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X-ORIGINAL-URL:https://cmsa.fas.harvard.edu
X-WR-CALDESC:Events for CMSA
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190426T143000
DTEND;TZID=America/New_York:20200426T153000
DTSTAMP:20260418T212021
CREATED:20240212T100818Z
LAST-MODIFIED:20240221T092817Z
UID:10001958-1556289000-1587915000@cmsa.fas.harvard.edu
SUMMARY:4/26/2019 General Relativity Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-26-2019-general-relativity-seminar/
CATEGORIES:General Relativity Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200325T100000
DTEND;TZID=America/New_York:20200429T140000
DTSTAMP:20260418T212021
CREATED:20230715T074440Z
LAST-MODIFIED:20250328T195935Z
UID:10000128-1585130400-1588168800@cmsa.fas.harvard.edu
SUMMARY:Frontiers in Applied Mathematics and Computation
DESCRIPTION:Together with the School of Engineering and Applied Sciences\, the CMSA will be hosting a lecture series on the Frontiers in Applied Mathematics and Computation. Talks in this series will aim to highlight current research trends at the interface of applied math and computation and will explore the application of these trends to challenging scientific\, engineering\, and societal problems. \nLectures will take place on March 25\, April 1\, and April 29\, 2021. \nSpeakers: \n\nGeorge Biros (U.T. Austin)\nLaura Grigori (INRIA Paris)\nSamory K. Kpotufe (Columbia)\nJonas Martin Peters (University of Copenhagen)\nJoseph M. Teran (UCLA)\n\n\nThe schedule below will be updated as talks are confirmed. \n  \n\n\n\nDate/Time\nSpeaker\nTitle/Abstract\n\n\n\n\n3/25/2021\n10:00 – 11:00am ET\nJoseph M. Teran\nTitle: Affine-Particle-In-Cell with Conservative Resampling and Implicit Time Stepping for Surface Tension Forces \nAbstract: The Particle-In-Cell (PIC) method of Harlow is one of the first and most widely used numerical methods for Partial Differential Equations (PDE) in computational physics. Its relative efficiency\, versatility and intuitive implementation have made it particularly popular in computational incompressible flow\, plasma physics and large strain elastoplasticity. PIC is characterized by its dual particle/grid (Lagrangian/Eulerian) representation of material where particles are generally used to track material transport in a Lagrangian way and a structured Eulerian grid is used to discretize remaining spatial derivatives in the PDE. I will discuss the importance of conserving linear and angular momentum when switching between these two representations and the recent Affine-Particle-In-Cell (APIC) extension to PIC designed for this conservation. I will also discuss a recent APIC technique for discretizing surface tension forces and their linearizations needed for implicit time stepping. This technique is characterized by a novel surface resampling strategy and I will discuss a generalization of the APIC conservation to this setting.\n\n\n4/1/2021\n9:00 – 10:00am ET\nGeorge Biros\nTitle: Inverse biophysical modeling and its application to neurooncology \nAbstract: A predictive\, patient-specific\, biophysical model of tumor growth would be an invaluable tool for causally connecting diagnostics with predictive medicine. For example\, it could be used for tumor grading\, characterization of the tumor microenvironment\, recurrence prediction\, and treatment planning\,  e.g.\, chemotherapy protocol or enrollment eligibility for clinical trials. Such a model also would provide an important bridge between molecular drivers of tumor growth and imaging-based phenotypic signatures\, and thus\,  help identify and quantify mechanism-based associations between these two. Unfortunately\, such a predictive biophysical model does not exist. Existing models undergoing clinical evaluation are too simple–they do not even capture the MRI phenotype. Although many highly complex models have been proposed\, the major hurdle in deploying them clinically is their calibration and validation. \nIn this talk\, I will discuss the challenges related to the calibration and validation of biophysical models\, and in particular the mathematical structure of the underlying inverse problems. I will also present a new algorithm that localizes the tumor origin within a few millimeters.\n\n\n4/1/2021\n10:00 – 11:00am ET\nSamory K. Kpotufe\nTitle: From Theory to Clustering \nAbstract: Clustering is a basic problem in data analysis\, consisting of partitioning data into meaningful groups called clusters. Practical clustering procedures tend to meet two criteria: flexibility in the shapes and number of clusters estimated\, and efficient processing. While many practical procedures might meet either of these criteria in different applications\, general guarantees often only hold for theoretical procedures that are hard if not impossible to implement. A main aim is to address this gap.\nWe will discuss two recent approaches that compete with state-of-the-art procedures\, while at the same time relying on rigorous analysis of clustering. The first approach fits within the framework of density-based clustering\, a family of flexible clustering approaches. It builds primarily on theoretical insights on nearest-neighbor graphs\, a geometric data structure shown to encode local information on the data density. The second approach speeds up kernel k-means\, a popular Hilbert space embedding and clustering method. This more efficient approach relies on a new interpretation – and alternative use – of kernel-sketching as a geometry-preserving random projection in Hilbert space.\nFinally\, we will present recent experimental results combining the benefits of both approaches in the IoT application domain.\nThe talk is based on various works with collaborators Sanjoy Dasgupta\, Kamalika Chaudhuri\, Ulrike von Luxburg\, Heinrich Jiang\, Bharath Sriperumbudur\, Kun Yang\, and Nick Feamster.\n\n\n4/29/2021\n12:00 – 1:00pm ET\nJonas Martin Peters\nTitle: Causality and Distribution Generalization \nAbstract: Purely predictive methods do not perform well when the test distribution changes too much from the training distribution. Causal models are known to be stable with respect to distributional shifts such as arbitrarily strong interventions on the covariates\, but do not perform well when the test distribution differs only mildly from the training distribution. We discuss anchor regression\, a framework that provides a trade-off between causal and predictive models. The method poses different (convex and non-convex) optimization problems and relates to methods that are tailored for instrumental variable settings. We show how similar principles can be used for inferring metabolic networks. If time allows\, we discuss extensions to nonlinear models and theoretical limitations of such methodology.\n\n\n4/29/2021\n1:00 – 2:00pm ET\nLaura Grigori\nTitle: Randomization and communication avoiding techniques for large scale linear algebra \nAbstract: In this talk we will discuss recent developments of randomization and communication avoiding techniques for solving large scale linear algebra operations. We will focus in particular on solving linear systems of equations and we will discuss a randomized process for orthogonalizing a set of vectors and its usage in GMRES\, while also exploiting mixed precision.  We will also discuss a robust multilevel preconditioner that allows to further accelerate solving large scale linear systems on parallel computers.
URL:https://cmsa.fas.harvard.edu/event/frontiers-in-applied-mathematics-and-computation/
LOCATION:Virtual
CATEGORIES:Event,Special Lectures
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CDAM-poster.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200401T140000
DTEND;TZID=America/New_York:20200401T150000
DTSTAMP:20260418T212021
CREATED:20240209T113836Z
LAST-MODIFIED:20240209T113836Z
UID:10001862-1585749600-1585753200@cmsa.fas.harvard.edu
SUMMARY:4/1/2020 Random Matrix and Probability Theory Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-1-2020-random-matrix-and-probability-theory-seminar/
CATEGORIES:Random Matrix & Probability Theory Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200403T103000
DTEND;TZID=America/New_York:20200403T120000
DTSTAMP:20260418T212021
CREATED:20240209T114337Z
LAST-MODIFIED:20240209T153726Z
UID:10001865-1585909800-1585915200@cmsa.fas.harvard.edu
SUMMARY:4/3/2020 General Relativity Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-3-2020-general-relativity-seminar/
LOCATION:Virtual
CATEGORIES:General Relativity Seminar,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200404T150000
DTEND;TZID=America/New_York:20200404T160000
DTSTAMP:20260418T212021
CREATED:20230715T081154Z
LAST-MODIFIED:20231229T054939Z
UID:10000129-1586012400-1586016000@cmsa.fas.harvard.edu
SUMMARY:CMSA Math-Science Literature Lecture: The ADHM construction of Yang-Mills instantons
DESCRIPTION:Simon Donaldson (Stony Brook) \nTitle: The ADHM construction of Yang-Mills instantons \nAbstract: In 1978 (Physics Letters 65A) Atiyah\, Hitchin\, Drinfeld and Manin (ADHM) described a construction of the general solution of the Yang-Mills instanton equations over the 4-sphere using linear algebra. This was a major landmark in the modern interaction between geometry and physics\,  and the construction has been the scene for much research activity up to the present day. In this lecture we will review the background and the original ADHM proof\,  using Penrose’s twistor theory and results on algebraic vector bundles over projective 3-space. As time permits\, we will also discuss some further developments\, for example\, the work of Nahm on monopoles and connections to Mukai duality for bundles over complex tori. \nVideo | Slides
URL:https://cmsa.fas.harvard.edu/event/cmsa-math-science-literature-lecture_donaldson/
LOCATION:Virtual
CATEGORIES:Event,Math Science Literature Lecture Series
ATTACH;FMTTYPE=image/jpeg:https://cmsa.fas.harvard.edu/media/Lecture_Donaldson-pdf.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200408T103000
DTEND;TZID=America/New_York:20200408T120000
DTSTAMP:20260418T212021
CREATED:20240213T103845Z
LAST-MODIFIED:20240213T103845Z
UID:10002449-1586341800-1586347200@cmsa.fas.harvard.edu
SUMMARY:4/8/2020 Quantum Matter seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-8-2020-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200413T120000
DTEND;TZID=America/New_York:20200422T130000
DTSTAMP:20260418T212021
CREATED:20240209T105609Z
LAST-MODIFIED:20240209T105609Z
UID:10001837-1586779200-1587560400@cmsa.fas.harvard.edu
SUMMARY:4/13/2020 Math-Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-13-2020-math-physics-seminar/
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200415T080000
DTEND;TZID=America/New_York:20200415T090000
DTSTAMP:20260418T212021
CREATED:20230715T081655Z
LAST-MODIFIED:20231229T055314Z
UID:10000130-1586937600-1586941200@cmsa.fas.harvard.edu
SUMMARY:CMSA Math-Science Literature Lecture: Why do some universities have separate departments of statistics?
DESCRIPTION:Donald Rubin (Harvard) \nTitle: Why do some universities have separate departments of statistics? And are they all anachronisms\, destined to follow the path of other dinosaurs? \nVideo | Slides
URL:https://cmsa.fas.harvard.edu/event/cmsa-math-science-literature-lecture_rubin/
LOCATION:Virtual
CATEGORIES:Event,Math Science Literature Lecture Series
ATTACH;FMTTYPE=image/jpeg:https://cmsa.fas.harvard.edu/media/Lecture-Series-Don-pdf.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200415T163000
DTEND;TZID=America/New_York:20200415T173000
DTSTAMP:20260418T212021
CREATED:20240209T114437Z
LAST-MODIFIED:20240507T194616Z
UID:10001866-1586968200-1586971800@cmsa.fas.harvard.edu
SUMMARY:Stability of spacetimes with supersymmetric compactifications
DESCRIPTION:Speaker: Lars Andersson (Max-Planck Institute for Gravitational Physics) \nTitle: Stability of spacetimes with supersymmetric compactifications \nAbstract: Spacetimes with compact directions\, which have special holonomy such as Calabi-Yau spaces\, play an important role in supergravity and string theory. In this talk I will discuss the global\, non-linear stability for the vacuum Einstein equations on a spacetime which is a cartesian product of a high dimensional Minkowski space with a compact Ricci flat internal space with special holonomy. I will start by giving a brief overview of related stability problems which have received a lot of attention recently\, including the black hole stability problem. This is based on joint work with Pieter Blue\, Zoe Wyatt\, and Shing-Tung Yau.
URL:https://cmsa.fas.harvard.edu/event/4-15-2020-colloquium/
LOCATION:Virtual
CATEGORIES:Colloquia & Seminar,Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Colloquium-04.15.20-1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200416T103000
DTEND;TZID=America/New_York:20200416T120000
DTSTAMP:20260418T212021
CREATED:20240209T114516Z
LAST-MODIFIED:20240209T154751Z
UID:10001868-1587033000-1587038400@cmsa.fas.harvard.edu
SUMMARY:4/16/2020 Condensed Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-16-2020-condensed-matter-seminar/
LOCATION:Virtual
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200420T000000
DTEND;TZID=America/New_York:20200420T130000
DTSTAMP:20260418T212021
CREATED:20240209T114055Z
LAST-MODIFIED:20240209T114055Z
UID:10001863-1587340800-1587387600@cmsa.fas.harvard.edu
SUMMARY:4/20/2020 Math Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-20-2020-math-physics-seminar/
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200422T103000
DTEND;TZID=America/New_York:20200422T120000
DTSTAMP:20260418T212021
CREATED:20240216T101157Z
LAST-MODIFIED:20240216T101157Z
UID:10002763-1587551400-1587556800@cmsa.fas.harvard.edu
SUMMARY:4/22/2020 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-22-2020-quantum-matter-seminar/
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200422T140000
DTEND;TZID=America/New_York:20200422T150000
DTSTAMP:20260418T212021
CREATED:20240209T102835Z
LAST-MODIFIED:20240209T154714Z
UID:10001826-1587564000-1587567600@cmsa.fas.harvard.edu
SUMMARY:4/22/2020 RM&PT Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-22-2020-rmpt-seminar/
LOCATION:Virtual
CATEGORIES:Random Matrix & Probability Theory Seminar,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200423T103000
DTEND;TZID=America/New_York:20200423T120000
DTSTAMP:20260418T212021
CREATED:20240209T105232Z
LAST-MODIFIED:20240209T105232Z
UID:10001834-1587637800-1587643200@cmsa.fas.harvard.edu
SUMMARY:4/23/2020 Condensed Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-23-2020-condensed-matter-seminar/
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200427T000000
DTEND;TZID=America/New_York:20200427T130000
DTSTAMP:20260418T212021
CREATED:20240209T110122Z
LAST-MODIFIED:20240209T110122Z
UID:10001840-1587945600-1587992400@cmsa.fas.harvard.edu
SUMMARY:4/27/2020 Math-Physics Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-27-2020-math-physics-seminar/
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200429T103000
DTEND;TZID=America/New_York:20200429T120000
DTSTAMP:20260418T212021
CREATED:20240209T100056Z
LAST-MODIFIED:20240216T085255Z
UID:10001818-1588156200-1588161600@cmsa.fas.harvard.edu
SUMMARY:4/29/2020 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-29-2020-quantum-matter-seminar/
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200429T140000
DTEND;TZID=America/New_York:20200429T150000
DTSTAMP:20260418T212021
CREATED:20240209T101703Z
LAST-MODIFIED:20240216T085622Z
UID:10001820-1588168800-1588172400@cmsa.fas.harvard.edu
SUMMARY:4/29/2020 Random Matrix and Probability Theory Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-29-2020-random-matrix-and-probability-theory-seminar/
CATEGORIES:Random Matrix & Probability Theory Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200430T103000
DTEND;TZID=America/New_York:20200430T120000
DTSTAMP:20260418T212021
CREATED:20240209T103318Z
LAST-MODIFIED:20240209T103318Z
UID:10001828-1588242600-1588248000@cmsa.fas.harvard.edu
SUMMARY:4/30/2020 Condensed Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/4-30-2020-condensed-matter-seminar/
CATEGORIES:Seminars
END:VEVENT
END:VCALENDAR