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X-WR-CALNAME:CMSA
X-ORIGINAL-URL:https://cmsa.fas.harvard.edu
X-WR-CALDESC:Events for CMSA
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BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
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DTSTART:20170312T070000
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180402T163000
DTEND;TZID=America/New_York:20180403T180000
DTSTAMP:20260717T082004
CREATED:20230717T174857Z
LAST-MODIFIED:20260218T203218Z
UID:10000076-1522686600-1522778400@cmsa.fas.harvard.edu
SUMMARY:Math Science Lectures in Honor of Raoul Bott\, April 2-3
DESCRIPTION:On April 2-3\, the CMSA will be hosting two lectures by Freddy Cachazo (Perimeter Institute) on “Geometry and Combinatorics in Particle Interactions.”  This will be the first of the new annual Bott Math Science Lecture Series hosted by the CMSA. \nThe lectures will take place from 4:30-5:30pm in Science Center\, Hall D. \n \n \n  \n 
URL:https://cmsa.fas.harvard.edu/event/math-science-lectures-in-honor-of-raoul-bott-april-2-3/
LOCATION:Harvard Science Center\, 1 Oxford Street\, Cambridge\, MA\, 02138
CATEGORIES:Event,Math Science Lectures in Honor of Raoul Bott,Special Lectures
ATTACH;FMTTYPE=image/jpeg:https://cmsa.fas.harvard.edu/media/Cachazo-e1519325938458.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180402T120000
DTEND;TZID=America/New_York:20180402T133000
DTSTAMP:20260717T082004
CREATED:20240213T094751Z
LAST-MODIFIED:20240213T094751Z
UID:10002364-1522670400-1522675800@cmsa.fas.harvard.edu
SUMMARY:4-2-2018 Mathematical Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-2-2018-mathematical-physics-seminar/
LOCATION:MA
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180328T163000
DTEND;TZID=America/New_York:20180328T173000
DTSTAMP:20260717T082004
CREATED:20240213T064501Z
LAST-MODIFIED:20240515T174531Z
UID:10002125-1522254600-1522258200@cmsa.fas.harvard.edu
SUMMARY:A Mean Field View of the Landscape of Two-Layers Neural Networks
DESCRIPTION:Speaker: Andrea Montanari (Stanford) \nTitle: A Mean Field View of the Landscape of Two-Layers Neural Networks \nAbstract: Multi-layer neural networks are among the most powerful models in machine learning and yet\, the fundamental reasons for this success defy mathematical understanding. Learning a neural network requires to optimize a highly non-convex and high-dimensional objective (risk function)\, a problem which is usually attacked using stochastic gradient descent (SGD). Does SGD converge to a global optimum of the risk or only to a local optimum? In the first case\, does this happen because local minima are absent\, or because SGD somehow avoids them? In the second\, why do local minima reached by SGD have good generalization properties? We consider a simple case\, namely two-layers neural networks\, and prove that –in a suitable scaling limit– the SGD dynamics is captured by a certain non-linear partial differential equation. We then consider several specific examples\, and show how the asymptotic description can be used to prove convergence of SGD to network with nearly-ideal generalization error. This description allows to ‘average-out’ some of the complexities of the landscape of neural networks\, and can be used to capture some important variants of SGD as well. [Based on joint work with Song Mei and Phan-Minh Nguyen]
URL:https://cmsa.fas.harvard.edu/event/3-28-2018-colloquium/
LOCATION:CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-032818-e1521831836462-1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180326T120000
DTEND;TZID=America/New_York:20180326T133000
DTSTAMP:20260717T082004
CREATED:20240213T094518Z
LAST-MODIFIED:20240213T094518Z
UID:10002362-1522065600-1522071000@cmsa.fas.harvard.edu
SUMMARY:3-26-2018 Math Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/3-26-2018-math-physics-seminar/
LOCATION:MA
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180324T090000
DTEND;TZID=America/New_York:20180326T181500
DTSTAMP:20260717T082004
CREATED:20230717T174646Z
LAST-MODIFIED:20250304T212149Z
UID:10000074-1521882000-1522088100@cmsa.fas.harvard.edu
SUMMARY:Workshop on Geometry\, Imaging\, and Computing
DESCRIPTION:On March 24-26\, The Center of Mathematical Sciences and Applications will be hosting a workshop on Geometry\, Imaging\, and Computing\, based off  the journal of the same name. The workshop will take place in CMSA building\, G10. \nThe organizing committee consists of Yang Wang (HKUST)\, Ronald Lui (CUHK)\, David Gu (Stony Brook)\, and Shing-Tung Yau (Harvard). \nConfirmed Speakers: \n\nJianfeng Cai (HKUST)\nShikui Chen (Stony Brook)\nJerome Darbon (Brown University)\nLaurent Demanet (MIT)\nDavid Gu (Stony Brook)\nMonica Hurdal (Florida State University)\nRongjie Lai (RPI)\nYue Lu (Harvard)\nRonald Lok Ming Lui (CUHK)\nLakshminarayanan Mahadevan (Harvard)\nEric Miller (Tufts)\nAshley Prater  (AFOSR)\nLixin Shen (Syracuse University)\nAllen Tannenbaum (Stony Brook)\nGuowei Wei (Michigan State)\nStephen Wong (Houston Methodist)\nJun Zhang (University of Michigan\, Ann Arbor)\nSong Zhang (Purdue University)\nHongkai Zhao (University of California\, Irvine)
URL:https://cmsa.fas.harvard.edu/event/workshop-on-geometry-imaging-and-computing/
LOCATION:CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Event,Workshop
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/GIC-Poster-2-e1520002551865.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180319T120000
DTEND;TZID=America/New_York:20180319T133000
DTSTAMP:20260717T082004
CREATED:20240213T094312Z
LAST-MODIFIED:20240213T094312Z
UID:10002358-1521460800-1521466200@cmsa.fas.harvard.edu
SUMMARY:3/19/2018 Mathematical Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/3-19-2018-mathematical-physics-seminar/
LOCATION:MA
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180315T150000
DTEND;TZID=America/New_York:20180315T160000
DTSTAMP:20260717T082004
CREATED:20240213T100139Z
LAST-MODIFIED:20240213T100209Z
UID:10002381-1521126000-1521129600@cmsa.fas.harvard.edu
SUMMARY:Dmytro Shklyrov HMS Focused Lecture Series
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/dmytro-shklyrov-hms-focused-lecture-series/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180307T163000
DTEND;TZID=America/New_York:20180307T173000
DTSTAMP:20260717T082004
CREATED:20240213T063843Z
LAST-MODIFIED:20240515T175119Z
UID:10002121-1520440200-1520443800@cmsa.fas.harvard.edu
SUMMARY:Harmonic functions and the chromatic polynomial
DESCRIPTION:Speaker: Richard Kenyon\, Brown \nTitle: Harmonic functions and the chromatic polynomial
URL:https://cmsa.fas.harvard.edu/event/2-7-2018-colloquium/
LOCATION:MA
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-030718-e1520356183643.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180305T152700
DTEND;TZID=America/New_York:20180305T152700
DTSTAMP:20260717T082004
CREATED:20240213T100816Z
LAST-MODIFIED:20240213T100816Z
UID:10002395-1520263620-1520263620@cmsa.fas.harvard.edu
SUMMARY:3-5-2018 Mathematical Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/3-5-2018-mathematical-physics-seminar/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180302T110000
DTEND;TZID=America/New_York:20180302T120000
DTSTAMP:20260717T082004
CREATED:20240213T095700Z
LAST-MODIFIED:20240213T095700Z
UID:10002372-1519988400-1519992000@cmsa.fas.harvard.edu
SUMMARY:3-2-2018 Mirror Symmetry Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/3-2-2018-mirror-symmetry-seminar/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180227T150000
DTEND;TZID=America/New_York:20180227T160000
DTSTAMP:20260717T082004
CREATED:20240213T100343Z
LAST-MODIFIED:20240213T100343Z
UID:10002386-1519743600-1519747200@cmsa.fas.harvard.edu
SUMMARY:2-27-2018 HMS Lecture
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-27-2018-hms-lecture/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180226T163000
DTEND;TZID=America/New_York:20180226T173000
DTSTAMP:20260717T082004
CREATED:20240213T063608Z
LAST-MODIFIED:20240515T175404Z
UID:10002119-1519662600-1519666200@cmsa.fas.harvard.edu
SUMMARY:Computer-assisted analysis of singularity formation of a regularized 3D Euler equation
DESCRIPTION:Speaker: Tom Hou\, Caltech \nTitle: Computer-assisted analysis of singularity formation of a regularized 3D Euler equation \n 
URL:https://cmsa.fas.harvard.edu/event/2-26-2018-colloquium/
LOCATION:MA
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-022618-e1519319166314.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180226T154200
DTEND;TZID=America/New_York:20180226T154200
DTSTAMP:20260717T082004
CREATED:20240213T100602Z
LAST-MODIFIED:20240213T100602Z
UID:10002390-1519659720-1519659720@cmsa.fas.harvard.edu
SUMMARY:2-26-2018 Mathematical Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-26-2018-mathematical-physics-seminar/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180223T153000
DTEND;TZID=America/New_York:20180223T153000
DTSTAMP:20260717T082004
CREATED:20240213T101226Z
LAST-MODIFIED:20240213T101226Z
UID:10002401-1519399800-1519399800@cmsa.fas.harvard.edu
SUMMARY:2-23-2018 RM & PT Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-23-2018-rm-pt-seminar/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Random Matrix & Probability Theory Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180223T100000
DTEND;TZID=America/New_York:20180223T110000
DTSTAMP:20260717T082004
CREATED:20240213T100016Z
LAST-MODIFIED:20240213T100016Z
UID:10002377-1519380000-1519383600@cmsa.fas.harvard.edu
SUMMARY:2-23-2018 Mirror Symmetry Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-23-2018-mirror-symmetry-seminar/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180221T163000
DTEND;TZID=America/New_York:20180221T173000
DTSTAMP:20260717T082004
CREATED:20240213T063335Z
LAST-MODIFIED:20240515T175648Z
UID:10002115-1519230600-1519234200@cmsa.fas.harvard.edu
SUMMARY:Essential concepts of Causal inference—a remarkable history
DESCRIPTION:Speaker: Don Rubin (Harvard Statistics) \nTitle: Essential concepts of Causal inference—a remarkable history \nAbstract: I believe that a deep understanding of cause and effect\, and how to estimate causal effects from data\, complete with the associated mathematical notation and expressions\, only evolved in the twentieth century.  The crucial idea of randomized experiments was apparently first proposed in 1925 in the context of agricultural field trails but quickly moved to be applied also in studies of animal breeding and then in industrial manufacturing.  The conceptual understanding seemed to be tied to ideas that were developing in quantum mechanics.  The key ideas of randomized experiments evidently were not applied to studies of human beings until the 1950s\, when such experiments began to be used in controlled medical trials\, and then in social science — in education and economics.  Humans are more complex than plants and animals\, however\, and with such trials came the attendant complexities of non-compliance with assigned treatment and the occurrence of “hawthorne” and placebo effects.  The formal application of the insights from earlier simpler experimental settings to more complex ones dealing with people\, started in the 1970s and continue to this day\, and include the bridging of classical mathematical ideas of experimentation\, including fractional replication and geometrical formulations from the early twentieth century\, with modern ideas that rely on powerful computing to implement aspects of design and analysis. \n 
URL:https://cmsa.fas.harvard.edu/event/2-21-2018-colloquium/
LOCATION:CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-022118-e1518810758992.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180216T150900
DTEND;TZID=America/New_York:20180216T150900
DTSTAMP:20260717T082004
CREATED:20240213T101421Z
LAST-MODIFIED:20240213T101421Z
UID:10002404-1518793740-1518793740@cmsa.fas.harvard.edu
SUMMARY:2-16-2018 RM & PT Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-16-2018-rm-pt-seminar/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Random Matrix & Probability Theory Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180216T110000
DTEND;TZID=America/New_York:20180216T110000
DTSTAMP:20260717T082004
CREATED:20240213T101018Z
LAST-MODIFIED:20240213T101018Z
UID:10002397-1518778800-1518778800@cmsa.fas.harvard.edu
SUMMARY:2-16-2018 Mirror Symmetry Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-16-2018-mirror-symmetry-seminar/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180216T093000
DTEND;TZID=America/New_York:20180216T093000
DTSTAMP:20260717T082004
CREATED:20230801T174827Z
LAST-MODIFIED:20231221T104855Z
UID:10000045-1518773400-1518773400@cmsa.fas.harvard.edu
SUMMARY:02-16-2018 Special Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/02-16-2018-special-seminar/
LOCATION:MA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180214T163000
DTEND;TZID=America/New_York:20180214T173000
DTSTAMP:20260717T082004
CREATED:20240213T063118Z
LAST-MODIFIED:20240515T180124Z
UID:10002113-1518625800-1518629400@cmsa.fas.harvard.edu
SUMMARY:A new program on quantum subgroups
DESCRIPTION:Speaker: Zhengwei Liu (Harvard Physics) \nTitle: A new program on quantum subgroups \nAbstract: Quantum subgroups have been studied since the 1980s. The A\, D\, E classification of subgroups of quantum SU(2) is a quantum analogue of the McKay correspondence. It turns out to be related to various areas in mathematics and physics. Inspired by the quantum McKay correspondence\, we introduce a new program that our group at Harvard is developing. \n 
URL:https://cmsa.fas.harvard.edu/event/02-14-2018-colloqium/
LOCATION:MA
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-021418-e1518126484875.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180209T110000
DTEND;TZID=America/New_York:20180209T110000
DTSTAMP:20260717T082004
CREATED:20240213T102158Z
LAST-MODIFIED:20240213T102158Z
UID:10002416-1518174000-1518174000@cmsa.fas.harvard.edu
SUMMARY:02-09-2018 Mirror Symmetry Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/02-09-2018-mirror-symmetry-seminar/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180208T170000
DTEND;TZID=America/New_York:20180208T180000
DTSTAMP:20260717T082004
CREATED:20240213T062806Z
LAST-MODIFIED:20240515T181311Z
UID:10002110-1518109200-1518112800@cmsa.fas.harvard.edu
SUMMARY:Sequences: random\, structured or something in between
DESCRIPTION:Speaker: Fan Chung (University of California\, San Diego) \nTitle: Sequences: random\, structured or something in between \nAbstract: There are many fundamental problems concerning sequences that arise in many areas of mathematics and computation. Typical problems include finding or avoiding patterns; testing or validating various ‘random-like’ behavior; analyzing or comparing different statistics\, etc. In this talk\, we will examine various notions of regularity or irregularity for sequences and mention numerous open problems. \n 
URL:https://cmsa.fas.harvard.edu/event/02-08-2018-colloquium/
LOCATION:MA
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-020818-e1518025233926.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180205T120000
DTEND;TZID=America/New_York:20180205T130000
DTSTAMP:20260717T082004
CREATED:20240213T102420Z
LAST-MODIFIED:20240213T102420Z
UID:10002419-1517832000-1517835600@cmsa.fas.harvard.edu
SUMMARY:1-5-2018 Mathematical Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/1-5-2018-mathematical-physics-seminar/
LOCATION:MA
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180205T090000
DTEND;TZID=America/New_York:20180209T170000
DTSTAMP:20260717T082004
CREATED:20230717T174149Z
LAST-MODIFIED:20250304T211916Z
UID:10000044-1517821200-1518195600@cmsa.fas.harvard.edu
SUMMARY:Workshop on Probabilistic and Extremal Combinatorics
DESCRIPTION:The workshop on Probabilistic and Extremal Combinatorics will take place February 5-9\, 2018 at the Center of Mathematical Sciences and Applications\, located at 20 Garden Street\, Cambridge\, MA. \nExtremal and Probabilistic Combinatorics are two of the most central branches of modern combinatorial theory. Extremal Combinatorics deals with problems of determining or estimating the maximum or minimum possible cardinality of a collection of finite objects satisfying certain requirements. Such problems are often related to other areas including Computer Science\, Information Theory\, Number Theory and Geometry. This branch of Combinatorics has developed spectacularly over the last few decades. Probabilistic Combinatorics can be described informally as a (very successful) hybrid between Combinatorics and Probability\, whose main object of study is probability distributions on discrete structures. \nThere are many points of interaction between these fields. There are deep similarities in methodology. Both subjects are mostly asymptotic in nature. Quite a few important results from Extremal Combinatorics have been proven applying probabilistic methods\, and vice versa. Such emerging subjects as Extremal Problems in Random Graphs or the theory of graph limits stand explicitly at the intersection of the two fields and indicate their natural symbiosis. \nThe symposia will focus on the interactions between the above areas. These topics include Extremal Problems for Graphs and Set Systems\, Ramsey Theory\, Combinatorial Number Theory\, Combinatorial Geometry\, Random Graphs\, Probabilistic Methods and Graph Limits. \nParticipation: The workshop is open to participation by all interested researchers\, subject to capacity. \nConfirmed participants include: \n\nJozsef Balogh\, University of Illinois\, Urbana\nFan Chung (Graham)\, University of California\, San Diego\nAsaf Ferber\, Massachusetts Institute of Technology\nJacob Fox\, Stanford Unviersity\nDavid Gamarnik\, Massachusetts Institute of Technology\nPenny Haxell\, University of Waterloo\nHao Huang\, Emory University\nJeff Kahn\, Rutgers University\nPeter Keevash\, Oxford University\nMichael Krivelevich\, Tel Aviv University\nDaniela Kühn\, University of Birmingham\nShoham Letzer\, ITS Zürich\nShachar Lovett\, University of California\, San Diego\nEyal Lubetzky\, Courant Institute\nRob Morris\, IMPA\nBhargav Narayanan\, Rutgers University\nDeryk Osthus\, University of Birmingham\nJanos Pach\, NYU\nYuval Peres\, Microsoft Redmond\nAlexey Pokryovskyi\, ETH Zürich\nWojciech Samotij\, Tel Aviv University\nLisa Sauermann\, Stanford University\nMathias Schacht\, University of Hamburg\nAlexander Scott\, University of Oxford\nAsaf Shapira\, Tel Aviv University\nJozef Skokan\, London School of Economics\nJoel Spencer\, New York University\nAngelika Steger\, ETH Zurich\nJacques Verstraete\, University of California\, San Diego\nYufei Zhao\, Massachusetts Institute of Technology\nDavid Zuckerman\, University of Texas at Austin\n\nCo-organizers of this workshop include Benny Sudakov and David Conlon.  More details about this event\, including participants\, will be updated soon.
URL:https://cmsa.fas.harvard.edu/event/workshop-on-probabilistic-and-extremal-combinatorics/
LOCATION:CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Event,Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180202T144400
DTEND;TZID=America/New_York:20180202T144400
DTSTAMP:20260717T082004
CREATED:20240213T102555Z
LAST-MODIFIED:20240213T102555Z
UID:10002423-1517582640-1517582640@cmsa.fas.harvard.edu
SUMMARY:2-2-2018 Mirror Symmetry Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/2-2-2018-mirror-symmetry-seminar/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180129T144200
DTEND;TZID=America/New_York:20180129T144200
DTSTAMP:20260717T082004
CREATED:20240228T085343Z
LAST-MODIFIED:20240228T085343Z
UID:10002882-1517236920-1517236920@cmsa.fas.harvard.edu
SUMMARY:1-29-2018 Mathematical Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/1-29-2018-mathematical-physics-seminar/
LOCATION:MA
CATEGORIES:Mathematical Physics Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180126T143700
DTEND;TZID=America/New_York:20180126T143700
DTSTAMP:20260717T082004
CREATED:20240213T102934Z
LAST-MODIFIED:20240213T102934Z
UID:10002431-1516977420-1516977420@cmsa.fas.harvard.edu
SUMMARY:01-26-2018 Mirror Symmetry Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/01-26-2018-mirror-symmetry-seminar/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180125T142100
DTEND;TZID=America/New_York:20180125T142100
DTSTAMP:20260717T082004
CREATED:20240213T103415Z
LAST-MODIFIED:20240213T103415Z
UID:10002441-1516890060-1516890060@cmsa.fas.harvard.edu
SUMMARY:Quantum Cohomology\, Nakajima Varieties and Quantum groups
DESCRIPTION:During the Spring 2018 Semester Artan Sheshmani (QGM/CMSA) will be teaching a CMSA special lecture series on Quantum Cohomology\, Nakajima Vareties and Quantum groups. The lectures will be held Tuesdays and Thursdays beginning January 25th\, from 1:00 to 3:00pm in room G10\, CMSA Building. \nYou can watch Prof. Sheshmani describe the series here. \nThe Syllabus is as follows: \n\n\n\nDate………..\nTopic\nVideo/Audio\n\n\n1-25-2018\nGromov-Witten invariants  \nDefinition\, examples via algebraic geometry I\nVideo / Audio / Combined  \n\n*due to technical difficulties the audio and video are split for this lecture.\n\n\n 2-01-2018\nGromov-Witten invariants  \nVirtual Fundamental Class I (definition)\nVideo / Audio / Combined  \n\n*due to technical difficulties the audio and video are split for this lecture\n\n\n2-13-2018\nGromov-Witten invariants  \nVirtual Fundamental Class II (computation in some cases)\n\n\n\n 2-15-2018\nComputing GW invariants  \nThree level GW classes \nGenus zero invariants of the projective plane\n\n\n\n 2-20-2018\nQuantum Cohomology  \nSmall Quantum Cohomology (Definition and Properties) I\n\n\n\n2-22-2018\nQuantum Cohomology  \nSmall Quantum Cohomology (Definition and Properties) II\n\n\n\n2-27-2018\nQuantum Cohomology  \nBig Quantum Cohomology I\n\n\n\n 3-1-2018\nQuantum Cohomology  \nBig Quantum Cohomology II \nGW potential \nWDVV equation\n\n\n\n3-6-2018\nGW invariants via Quantum Cohomology  \nThe Quintic threefold case \nThe P^2 case\n\n\n\n\nGW invariants via Quantum Cohomology  \nDubrovin (quantum) connection\n\n\n\n\nNakajima varieties  \n-Algebraic and symplectic reduction\n\n\n\n\nNakajima varieties  \nQuasi maps to Nakajima varieties\n\n\n\n\nQuantum cohomology of Nakajima varieties  \nSmall Quantum Cohomology of Hilb^n (C2) I\n\n\n\n\nQuantum cohomology of Nakajima varieties  \nSmall Quantum Cohomology of Hilb^n (C2) II\n\n\n\n\nQuantum cohomology of Nakajima varieties  \nSmall Quantum Cohomology of Hilb^n (C2) III\n\n\n\n\nQuantum cohomology of Nakajima varieties  \nBig Quantum Cohomology of Hilb^n (C2) I\n \n\n\n\nQuantum cohomology of Nakajima varieties  \nBig Quantum Cohomology of Hilb^n (C2) II\n\n\n\n\nQuantum cohomology of Nakajima varieties  \nBig Quantum Cohomology of Hilb^n (C2) III\n\n\n\n\nQuantum cohomology of Nakajima varieties  \nBig Quantum Cohomology of Hilb^n (C2) IV\n 
URL:https://cmsa.fas.harvard.edu/event/quantum-cohomology-nakajima-varieties-and-quantum-groups/
LOCATION:MA
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180124T090000
DTEND;TZID=America/New_York:20180125T170000
DTSTAMP:20260717T082004
CREATED:20230717T173945Z
LAST-MODIFIED:20250305T214037Z
UID:10000042-1516784400-1516899600@cmsa.fas.harvard.edu
SUMMARY:Blockchain Conference
DESCRIPTION:On January 24-25\, 2019 the Center of Mathematical Sciences will be hosting a conference on distributed-ledger (blockchain) technology. The conference is intended to cover a broad range of topics\, from abstract mathematical aspects (cryptography\, game theory\, graph theory\, theoretical computer science) to concrete applications (in accounting\, government\, economics\, finance\, management\, medicine). The talks will take place in Science Center\, Hall D. \nhttps://youtu.be/FyKCCutxMYo \nPhotos\n \nSpeakers: \n\nJoseph Abadi\, Princeton University\nBenedikt Bunz\, Stanford University\nJake Cacciapaglia\, Nebula Genomics/Harvard Medical School\nEduardo Castello\, Massachusetts Institute of Technology\nAlisa DiCaprio\, R3\nZhiguo He\, University of Chicago\nSteven Kou\, Boston University\nAnne Lafarre\, Tilburg University\nJacob Leshno\, University of Chicago\nBruce Schneier\, Harvard Kennedy School\nDavid Schwartz\, Ripple\nElaine Shi\, Cornell University/Thunder Research\nHong Wan\, NCSU
URL:https://cmsa.fas.harvard.edu/event/blockchain-conference/
LOCATION:Harvard Science Center\, 1 Oxford Street\, Cambridge\, MA\, 02138
CATEGORIES:Conference,Event
ATTACH;FMTTYPE=image/jpeg:https://cmsa.fas.harvard.edu/media/Blockchain-Final-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20180123T170000
DTEND;TZID=America/New_York:20180123T170000
DTSTAMP:20260717T082004
CREATED:20240213T103131Z
LAST-MODIFIED:20240213T103131Z
UID:10002436-1516726800-1516726800@cmsa.fas.harvard.edu
SUMMARY:2018 HMS Focused Lecture Series
DESCRIPTION:As part of their CMSA visitation\, HMS focused visitors will be giving lectures on various topics related to Homological Mirror Symmetry throughout the Spring 2018 Semester. The lectures will take place  on Tuesdays and Thursdays in the CMSA Building\, 20 Garden Street\, Room G10. \nThe schedule will be updated below. \n\n\n\nDate\nSpeaker\nTitle/Abstract\n\n\nJanuary 23\, 25\, 30 and February 1  \n3-5pm \n*Room G10*\nIvan Losev  \n(Northeastern)\nTitle: BGG category O: towards symplectic duality  \nAbstract: We will discuss a very classical topic in the representation theory of semisimple Lie algebras: the Bernstein-Gelfand-Gelfand (BGG) category O. Our aim will be to motivate and state a celebrated result of Beilinson\, Ginzburg and Soergel on the Koszul duality for such categories\, explaining how to compute characters of simple modules (the Kazhdan-Lusztig theory) along the way. The Koszul duality admits a conjectural generalization (Symplectic duality) that is a Mathematical manifestation of 3D Mirror symmetry. We will discuss that time permitting. \nApproximate (optimistic) plan of the lectures: \n1) Preliminaries and BGG category O. \n2) Kazhdan-Lusztig bases. Beilinson-Bernstein localization theorem. \n3) Localization theorem continued. Soergel modules. \n4) Koszul algebras and Koszul duality for categories O. \nTime permitting: other instances of Symplectic duality. \nPrerequisites: \nSemi-simple Lie algebras and their finite dimensional representation theory. \nSome  Algebraic geometry. No prior knowledge of category O/ Geometric \nRepresentation theory is assumed. \nScanned from a Xerox Multifunction Device\n\n\nFebruary 27\,  \nand March 1 \n3-5pm\nColin Diemer  \n(IHES)\nTitle: Moduli spaces of Landau-Ginzburg models and (mostly Fano) HMS.  \nAbstract: Mirror symmetry as a general phenomenon is understood to take place near the large complex structure limit resp. large radius limit\, and so implicitly involves degenerations of the spaces under consideration. Underlying most mirror theorems is thus a mirror map which gives a local identification of respective A-model and B-model moduli spaces. When dealing with mirror symmetry for Calabi-Yau’s the role of the mirror map is well-appreciated. In these talks I’ll discuss the role of moduli in mirror symmetry of Fano varieties (where the mirror is a Landau-Ginzburg (LG) model). Some topics I expect to cover are a general structure theory of moduli of LG models (follows Katzarkov\, Kontsevich\, Pantev)\, the interplay of the topology  of LG models with autoequivalence relations in the Calabi-Yau setting\, and the relationship between Mori theory in the B-model and degenerations of the LG A-model. For the latter topic we’ll focus on the case of del Pezzo surfaces (due to unpublished work of Pantev) and the toric case (due to the speaker with Katzarkov and G. Kerr). Time permitting\, we may make some speculations on the role of LG moduli in the work of Gross-Hacking-Keel (in progress work of the speaker with T. Foster).\n\n\nMarch 6 and 8  \n4-5pm\nAdam Jacob  \n(UC Davis)\nTitle: The deformed Hermitian-Yang-Mills equation  \nAbstract: In this series I will discuss the deformed Hermitian-Yang-Mills equation\, which is a complex analogue of the special Lagrangian graph equation of Harvey-Lawson. I will describe its derivation in relation to the semi-flat setup of SYZ mirror symmetry\, followed by some basic properties of solutions. Later I will discuss methods for constructing solutions\, and relate the solvability to certain geometric obstructions. Both talks will be widely accessible\, and cover joint work with T.C. Collins and S.-T. Yau.\n\n\nMarch 6\, 8\, 13\, 15  \n3-4pm\nDmytro Shklyarov  \n(TU Chemnitz)\nTitle: On categories of matrix factorizations and their homological invariants  \nAbstract: The talks will cover the following topics: \n1. Matrix factorizations as D-branes. According to physicists\, the matrix factorizations of an isolated hypersurface singularity describe D-branes in the Landau-Ginzburg (LG) B-model associated with the singularity. The talk is devoted to some mathematical implications of this observation. I will start with a review of open-closed topological field theories underlying the LG B-models and then talk about their refinements. \n2. Semi-infinite Hodge theory of dg categories. Homological mirror symmetry asserts that the “classical” mirror correspondence relating the number of rational curves in a CY threefold to period integrals of its mirror should follow from the equivalence of the derived Fukaya category of the first manifold and the derived category of coherent sheaves on the second one. The classical mirror correspondence can be upgraded to an isomorphism of certain Hodge-like data attached to both manifolds\, and a natural first step towards proving the assertion would be to try to attach similar Hodge-like data to abstract derived categories. I will talk about some recent results in this direction and illustrate the approach in the context of the LG B-models. \n3. Hochschild cohomology of LG orbifolds. The scope of applications of the LG mod- els in mirror symmetry is significantly expanded once we include one extra piece of data\, namely\, finite symmetry groups of singularities. The resulting models are called orbifold LG models or LG orbifolds. LG orbifolds with abelian symmetry groups appear in mir- ror symmetry as mirror partners of varieties of general type\, open varieties\, or other LG orbifolds. Associated with singularities with symmetries there are equivariant versions of the matrix factorization categories which\, just as their non-equivariant cousins\, describe D-branes in the corresponding orbifold LG B-models. The Hochschild cohomology of these categories should then be isomorphic to the closed string algebra of the models. I will talk about an explicit description of the Hochschild cohomology of abelian LG orbifolds.\n\n\nApril 10 & 12  \n3-4pm\nMauricio Romo  \n(IAS)\nTitle: Gauged Linear Sigma Models\, Supersymmetric Localization and Applications  \nAbstract: In this series of lectures I will review various results on connections between gauged linear sigma models (GLSM) and mathematics. I will start with a brief introduction on the basic concepts about GLSMs\, and their connections to quantum geometry of Calabi-Yaus (CY). In the first lecture I will focus on nonperturbative results on GLSMs on closed 2-manifolds\, which provide a way to extract enumerative invariants and the elliptic genus of some classes of CYs. In the second lecture I will move to nonperturbative results in the case where the worldsheet is a disk\, in this case nonperturbative results provide interesting connections with derived categories and stability conditions. We will review those and provide applications to derived functors and local systems associated with  CYs. If time allows we will also review some applications to non-CY cases (in physics terms\, anomalous GLSMs). \nLecture notes\n\n\nApril 17\, 19\, 26  \n3-5pm\nAndrew  Harder  \n(University of Miami)\nTitle: Perverse sheaves of categories on surfaces  \nAbstract: Perverse sheaves of categories on a Riemann surface S are systems of categories and functors which are encoded by a graphs on S\, and which satisfy conditions that resemble the classical characterization of perverse sheaves on a disc. \nI’ll review the basic ideas behind Kapranov and Schechtman’s notion of a perverse schober and generalize this to perverse sheaves of categories on a punctured Riemann surface. Then I will give several examples of perverse sheaves of categories in both algebraic geometry\, symplectic geometry\, and category theory. Finally\, I will describe how one should be able to use related ideas to prove homological mirror symmetry for certain noncommutative deformations of projective 3-space. \n \n \n \n\n\nMay 15\, 17  \n1-3pm\nCharles Doran  \n(University of Alberta)\n\n\n\n\n\n\nLecture One:\nTitle: Picard-Fuchs uniformization and Calabi-Yau geometry\nAbstract:\n\n\n\n\n\n\nPart 1:  We introduce the notion of the Picard-Fuchs equations annihilating periods in families of varieties\, with emphasis on Calabi-Yau manifolds.  Specializing to the case of K3 surfaces\, we explore general results on “Picard-Fuchs uniformization” of the moduli spaces of lattice-polarized K3 surfaces and the interplay with various algebro-geometric normal forms for these surfaces.  As an application\, we obtain a universal differential-algebraic characterization of Picard rank jump loci in these moduli spaces.\n\nPart 2:  We next consider families with one natural complex structure modulus\, (e.g.\, elliptic curves\, rank 19 K3 surfaces\, b_1=4 Calabi-Yau threefolds\, …)\, where the Picard-Fuchs equations are ODEs.  What do the Picard-Fuchs ODEs for such families tell us about the geometry of their total spaces?  Using Hodge theory and parabolic cohomology\, we relate the monodromy of the Picard-Fuchs ODE to the Hodge numbers of the total space.  In particular\, we produce criteria for when the total space of a family of rank 19 polarized K3 surfaces can be Calabi-Yau.\n\n\n  \n\nLecture Two:\nTitle: Calabi-Yau fibrations: construction and classification\nAbstract: \nPart 1:  Codimension one Calabi-Yau submanifolds induce fibrations\, with the periods of the total space relating to those of the fibers and the structure of the fibration.  We describe a method of iteratively constructing Calabi-Yau manifolds in tandem with their Picard-Fuchs equations. Applications include the tower of mirrors to degree n+1 hypersurfaces in P^n and a tower of Calabi-Yau hypersurfaces encoding the n-sunset Feynman integrals. \nPart 2:  We develop the necessary theory to both construct and classify threefolds fibered by lattice polarized K3 surfaces.  The resulting theory is a complete generalization to threefolds of that of Kodaira for elliptic surfaces.  When the total space of the fibration is a Calabi-Yau threefold\, we conjecture a unification of CY/CY mirror symmetry and LG/Fano mirror symmetry by mirroring fibrations as Tyurin degenerations.  The detailed classification of Calabi-Yau threefolds with certain rank 19 polarized fibrations provides strong evidence for this conjecture by matching geometric characteristics of the fibrations with features of smooth Fano threefolds of Picard rank 1.
URL:https://cmsa.fas.harvard.edu/event/2018-hms-focused-lecture-series/
LOCATION:MA
CATEGORIES:Seminars
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