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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210513T103000
DTEND;TZID=America/New_York:20210513T120000
DTSTAMP:20260510T060812
CREATED:20240126T055239Z
LAST-MODIFIED:20240126T055239Z
UID:10001368-1620901800-1620907200@cmsa.fas.harvard.edu
SUMMARY:5/13/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/5-13-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210514T090000
DTEND;TZID=America/New_York:20210514T100000
DTSTAMP:20260510T060812
CREATED:20240126T054816Z
LAST-MODIFIED:20240126T054816Z
UID:10001365-1620982800-1620986400@cmsa.fas.harvard.edu
SUMMARY:5/20/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/5-20-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210518T103000
DTEND;TZID=America/New_York:20210518T120000
DTSTAMP:20260510T060812
CREATED:20240125T170922Z
LAST-MODIFIED:20240307T105733Z
UID:10001354-1621333800-1621339200@cmsa.fas.harvard.edu
SUMMARY:5/20/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/5-20-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210519T103000
DTEND;TZID=America/New_York:20210519T120000
DTSTAMP:20260510T060812
CREATED:20240126T054943Z
LAST-MODIFIED:20240126T054943Z
UID:10001366-1621420200-1621425600@cmsa.fas.harvard.edu
SUMMARY:5/19/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/5-19-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210521T090000
DTEND;TZID=America/New_York:20210612T170000
DTSTAMP:20260510T060812
CREATED:20230831T034826Z
LAST-MODIFIED:20250304T172540Z
UID:10000047-1621587600-1623517200@cmsa.fas.harvard.edu
SUMMARY:2021 Summer Introduction to Mathematical Research
DESCRIPTION:The Math Department and Harvard’s Center of Mathematical Sciences and Applications (CMSA) will be running a math program/course for mathematically minded undergraduates this summer. The course will be run by Dr. Yingying Wu from CMSA. Here is a description: \nSummer Introduction to Mathematical Research (sponsored by CMSA and the Harvard Math Department) \nIn this course\, we will start with an introduction to computer programming\, algorithm\, and scientific computing. Then we will discuss topics in topology\, classical geometry\, projective geometry\, differential geometry\, and see how they can be applied to machine learning. We will go on to discuss fundamental concepts of deep learning\, different deep neural network models\, and mathematical interpretations of why deep neural networks are effective from a calculus viewpoint. We will conclude the course with a gentle introduction to cryptography\, introducing some of the iconic topics: Yao’s Millionaires’ problem\, zero-knowledge proof\, the multi-party computation algorithm\, and its proof. \nThe course will meet 3 hours per week for 7 weeks via Zoom on days and times that will be scheduled for the convenience of the participants. There may be other times to be arranged for special events. \nThis program is only open to current Harvard undergraduates; both Mathematics concentrators and non-math concentrators are invited to apply. People already enrolled in a Math Department summer tutorial are welcome to partake in this program also. As with the summer tutorials\, there is no association with the Harvard Summer School; and neither Math concentration credit nor Harvard College credit will be given for completing this course. This course has no official Harvard status and enrollment does not qualify you for any Harvard related perks (such as a place to live if you are in Boston over the summer.) \nHowever: As with the summer tutorials\, those enrolled are eligible* to receive a stipend of $700\, and if you are a Mathematics concentrator\, any written paper for the course can be submitted to fulfill the Math Concentration third year paper requirement. (*The stipend is not available for people already receiving a stipend via the Math Department’s summer tutorial program\, nor is it available for PRISE participants or participants in the Herchel Smith program.) \nIf you wish to join this program\, please email Cliff Taubes (chtaubes@math.harvard.edu). The enrollment is limited to 10 people\, so don’t wait too long to apply.
URL:https://cmsa.fas.harvard.edu/event/2021-summer-introduction-to-mathematical-research/
CATEGORIES:Programs
ATTACH;FMTTYPE=image/jpeg:https://cmsa.fas.harvard.edu/media/CMSA-2-600x338-1-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210526T103000
DTEND;TZID=America/New_York:20210526T120000
DTSTAMP:20260510T060812
CREATED:20240125T170506Z
LAST-MODIFIED:20240125T170506Z
UID:10001350-1622025000-1622030400@cmsa.fas.harvard.edu
SUMMARY:6/3/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-3-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210527T090000
DTEND;TZID=America/New_York:20210527T100000
DTSTAMP:20260510T060812
CREATED:20240125T170757Z
LAST-MODIFIED:20240125T170757Z
UID:10001353-1622106000-1622109600@cmsa.fas.harvard.edu
SUMMARY:5/27/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/5-27-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210602T103000
DTEND;TZID=America/New_York:20210602T120000
DTSTAMP:20260510T060812
CREATED:20240125T170333Z
LAST-MODIFIED:20240307T101048Z
UID:10001349-1622629800-1622635200@cmsa.fas.harvard.edu
SUMMARY:6/2/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-2-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210603T090000
DTEND;TZID=America/New_York:20210603T100000
DTSTAMP:20260510T060812
CREATED:20240125T170637Z
LAST-MODIFIED:20240125T170637Z
UID:10001352-1622710800-1622714400@cmsa.fas.harvard.edu
SUMMARY:6/3/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-3-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210608T090000
DTEND;TZID=America/New_York:20210608T100000
DTSTAMP:20260510T060812
CREATED:20240125T165918Z
LAST-MODIFIED:20240125T165918Z
UID:10001346-1623142800-1623146400@cmsa.fas.harvard.edu
SUMMARY:6/10/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-10-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210609T103000
DTEND;TZID=America/New_York:20210609T120000
DTSTAMP:20260510T060812
CREATED:20240125T170051Z
LAST-MODIFIED:20240125T170051Z
UID:10001347-1623234600-1623240000@cmsa.fas.harvard.edu
SUMMARY:6/9/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-9-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210610T103000
DTEND;TZID=America/New_York:20210610T120000
DTSTAMP:20260510T060812
CREATED:20240125T170206Z
LAST-MODIFIED:20240125T170206Z
UID:10001348-1623321000-1623326400@cmsa.fas.harvard.edu
SUMMARY:6/10/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-10-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210615T110000
DTEND;TZID=America/New_York:20210615T123000
DTSTAMP:20260510T060812
CREATED:20230707T173422Z
LAST-MODIFIED:20240216T211240Z
UID:10001814-1623754800-1623760200@cmsa.fas.harvard.edu
SUMMARY:CMSA Math-Science Literature Lecture: Nonlinear stability of Kerr black holes for small angular momentum
DESCRIPTION:Sergiu Klainerman (Princeton University) \nTitle: Nonlinear stability of Kerr black holes for small angular momentum \nAbstract: According to a well-known conjecture\,  initial data sets\,  for the Einstein vacuum equations\, sufficiently close to a Kerr solution with parameters $a\, m$\, $|a|/m <1$\, have maximal developments with complete future null infinity and with domain of outer communication (i.e complement of a future event horizon)   which approaches  (globally)  a nearby Kerr solution. I will describe the main ideas in my recent joint work with Jeremie Szeftel concerning the resolution of the conjecture for small angular momentum\, i.e. $\, $|a|/m $ sufficiently small. The work\, ArXiv:2104.11857v1\,  also depends on forthcoming work on solutions of nonlinear wave equations in realistic perturbations of Kerr\,  with Szeftel and Elena Giorgi\,  which I will also describe. \nTalk chair: Lydia Bieri  \nVideo
URL:https://cmsa.fas.harvard.edu/event/cmsa-math-science-literature-lecture_klainerman/
LOCATION:Virtual
CATEGORIES:Event,Math Science Literature Lecture Series
ATTACH;FMTTYPE=image/jpeg:https://cmsa.fas.harvard.edu/media/Lecture_Klainerman-pdf.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210616T103000
DTEND;TZID=America/New_York:20210616T120000
DTSTAMP:20260510T060812
CREATED:20240125T165749Z
LAST-MODIFIED:20240125T165749Z
UID:10001345-1623839400-1623844800@cmsa.fas.harvard.edu
SUMMARY:6/16/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-16-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210617T103000
DTEND;TZID=America/New_York:20210617T120000
DTSTAMP:20260510T060812
CREATED:20240125T165626Z
LAST-MODIFIED:20240125T165626Z
UID:10001344-1623925800-1623931200@cmsa.fas.harvard.edu
SUMMARY:6/17/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-17-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210624T090000
DTEND;TZID=America/New_York:20210624T100000
DTSTAMP:20260510T060812
CREATED:20240125T165458Z
LAST-MODIFIED:20240125T165458Z
UID:10001343-1624525200-1624528800@cmsa.fas.harvard.edu
SUMMARY:6/24/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/6-24-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210701T090000
DTEND;TZID=America/New_York:20210701T100000
DTSTAMP:20260510T060812
CREATED:20240125T165332Z
LAST-MODIFIED:20240125T165332Z
UID:10001342-1625130000-1625133600@cmsa.fas.harvard.edu
SUMMARY:7/1/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-1-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210707T103000
DTEND;TZID=America/New_York:20210707T120000
DTSTAMP:20260510T060812
CREATED:20240125T165153Z
LAST-MODIFIED:20240125T165153Z
UID:10001341-1625653800-1625659200@cmsa.fas.harvard.edu
SUMMARY:7/7/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-7-2021-quantum-matter-seminar/
LOCATION:Virtual
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210708T090000
DTEND;TZID=America/New_York:20210708T100000
DTSTAMP:20260510T060812
CREATED:20240213T084942Z
LAST-MODIFIED:20240213T084942Z
UID:10002260-1625734800-1625738400@cmsa.fas.harvard.edu
SUMMARY:7/8/2021 Interdisciplinary Science Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-8-2021-interdisciplinary-science-seminar/
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210708T200000
DTEND;TZID=America/New_York:20210708T213000
DTSTAMP:20260510T060812
CREATED:20240125T165003Z
LAST-MODIFIED:20240125T165003Z
UID:10001340-1625774400-1625779800@cmsa.fas.harvard.edu
SUMMARY:7/8/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-8-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210714T113000
DTEND;TZID=America/New_York:20210714T120000
DTSTAMP:20260510T060812
CREATED:20240125T164804Z
LAST-MODIFIED:20240125T164804Z
UID:10001339-1626262200-1626264000@cmsa.fas.harvard.edu
SUMMARY:7/14/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-14-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210715T103000
DTEND;TZID=America/New_York:20210715T123000
DTSTAMP:20260510T060812
CREATED:20240125T164550Z
LAST-MODIFIED:20240125T164707Z
UID:10001338-1626345000-1626352200@cmsa.fas.harvard.edu
SUMMARY:Hybrid Fracton Orders
DESCRIPTION:Nathanan Tantivasadakarn (Harvard) \nVideo\nTitle: Hybrid Fracton Orders \nAbstract: I will introduce a family of gapped quantum phases that exhibit the phenomenology of both conventional three-dimensional topological orders and fracton orders called “Hybrid Fracton Orders”.  First\, I will present the simplest example of such an order: the “Hybrid X-cube” model\, where excitations can be labeled identically to those of the Z2 toric code tensored with the Z2 X-cube model\, but exhibit fusion and braiding properties between the two sets of excitations. Next\, I will provide a general construction of hybrid fracton orders which inputs a finite group G and an abelian normal subgroup N and produces an exactly solvable model. Such order can host non-abelian fracton excitations when G is non-abelian. Furthermore\, the mobilities of a general excitation is dictated by the choice of N\, from which by varying\, one can view as “interpolating” between a pure 3D topological order and a pure fracton order. \nBased on 2102.09555 and 2106.03842\n\n\n\n  \n  \n 
URL:https://cmsa.fas.harvard.edu/event/hybrid-fracton-orders/
LOCATION:Virtual
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210721T103000
DTEND;TZID=America/New_York:20210721T120000
DTSTAMP:20260510T060812
CREATED:20240213T085105Z
LAST-MODIFIED:20240213T085105Z
UID:10002262-1626863400-1626868800@cmsa.fas.harvard.edu
SUMMARY:7/21/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-21-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210722T080000
DTEND;TZID=America/New_York:20210722T093000
DTSTAMP:20260510T060812
CREATED:20240213T085228Z
LAST-MODIFIED:20240213T085228Z
UID:10002266-1626940800-1626946200@cmsa.fas.harvard.edu
SUMMARY:7/22/2021 Quantum Matter Seminar
DESCRIPTION:
URL:https://cmsa.fas.harvard.edu/event/7-22-2021-quantum-matter-seminar/
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210722T090000
DTEND;TZID=America/New_York:20210722T100000
DTSTAMP:20260510T060812
CREATED:20240213T085509Z
LAST-MODIFIED:20240227T090807Z
UID:10002271-1626944400-1626948000@cmsa.fas.harvard.edu
SUMMARY:Moduli spaces of stable pairs on algebraic surfaces
DESCRIPTION:Interdisciplinary Science Seminar \nSpeaker: Yinbang Lin (Tongji University) \nTitle: Moduli spaces of stable pairs on algebraic surfaces \nAbstract: As a variant of Grothendieck’s Quot schemes\, we introduce the moduli space of limit stable pairs. We show an example over a smooth projective algebraic surface where there is a virtual fundamental class. We are able to describe this class explicitly. We will also show an application towards moduli of sheaves.
URL:https://cmsa.fas.harvard.edu/event/7-22-2021-interdisciplinary-science-seminar/
LOCATION:Virtual
CATEGORIES:Interdisciplinary Science Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210729T103000
DTEND;TZID=America/New_York:20210729T120000
DTSTAMP:20260510T060812
CREATED:20240213T085639Z
LAST-MODIFIED:20240213T085639Z
UID:10002273-1627554600-1627560000@cmsa.fas.harvard.edu
SUMMARY:The nu=5/2 enigma: Recent insights from theory and experiment
DESCRIPTION:peaker: Ady Stern & David Mross (Weizmann) \nSpeaker: Ady Stern & David Mross (Weizmann \nTitle: The nu=5/2 enigma: Recent insights from theory and experiment \nAbstract: Non-Abelian phases of matter have long inspired quantum physicists across various disciplines. The strongest experimental evidence of such a phase arises in quantum Hall systems at the filling factor 5/2 but conflicts with decades of numerical works. We will briefly introduce the 5/2 plateau and explain some of the key obstacles to identifying its topological order. We will then describe recent experimental and theoretical progress\, including a proposal for resolving the 5/2 enigma based on electrical conductance measurements.
URL:https://cmsa.fas.harvard.edu/event/the-nu5-2-enigma-recent-insights-from-theory-and-experiment/
LOCATION:Virtual
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210824
DTEND;VALUE=DATE:20210825
DTSTAMP:20260510T060812
CREATED:20230705T081718Z
LAST-MODIFIED:20250328T145235Z
UID:10000070-1629763200-1629849599@cmsa.fas.harvard.edu
SUMMARY:Big Data Conference 2021
DESCRIPTION:On August 24\, 2021\, the CMSA hosted our seventh annual Conference on Big Data. The Conference features many speakers from the Harvard community as well as scholars from across the globe\, with talks focusing on computer science\, statistics\, math and physics\, and economics. \nThe 2021 Big Data Conference took place virtually on Zoom. \nOrganizers:  \n\nShing-Tung Yau\, William Caspar Graustein Professor of Mathematics\, Harvard University\nScott Duke Kominers\, MBA Class of 1960 Associate Professor\, Harvard Business\nHorng-Tzer Yau\, Professor of Mathematics\, Harvard University\nSergiy Verstyuk\, CMSA\, Harvard University\n\nSpeakers: \n\nAndrew Blumberg\, University of Texas at Austin\nMoran Koren\, Harvard CMSA\nHima Lakkaraju\, Harvard University\nKatrina Ligett\, The Hebrew University of Jerusalem\n\n\n\n\n\nTime (ET; Boston time)\nSpeaker\nTitle/Abstract\n\n\n9:00AM\nConference Organizers\nIntroduction and Welcome\n\n\n9:10AM – 9:55AM\nAndrew Blumberg\, University of Texas at Austin\nTitle: Robustness and stability for multidimensional persistent homology \nAbstract: A basic principle in topological data analysis is to study the shape of data by looking at multiscale homological invariants. The idea is to filter the data using a scale parameter that reflects feature size. However\, for many data sets\, it is very natural to consider multiple filtrations\, for example coming from feature scale and density. A key question that arises is how such invariants behave with respect to noise and outliers. This talk will describe a framework for understanding those questions and explore open problems in the area.\n\n\n10:00AM – 10:45AM\nKatrina Ligett\, The Hebrew University of Jerusalem\nTitle: Privacy as Stability\, for Generalization \nAbstract: Many data analysis pipelines are adaptive: the choice of which analysis to run next depends on the outcome of previous analyses. Common examples include variable selection for regression problems and hyper-parameter optimization in large-scale machine learning problems: in both cases\, common practice involves repeatedly evaluating a series of models on the same dataset. Unfortunately\, this kind of adaptive re-use of data invalidates many traditional methods of avoiding overfitting and false discovery\, and has been blamed in part for the recent flood of non-reproducible findings in the empirical sciences. An exciting line of work beginning with Dwork et al. in 2015 establishes the first formal model and first algorithmic results providing a general approach to mitigating the harms of adaptivity\, via a connection to the notion of differential privacy. In this talk\, we’ll explore the notion of differential privacy and gain some understanding of how and why it provides protection against adaptivity-driven overfitting. Many interesting questions in this space remain open. \nJoint work with: Christopher Jung (UPenn)\, Seth Neel (Harvard)\, Aaron Roth (UPenn)\, Saeed Sharifi-Malvajerdi (UPenn)\, and Moshe Shenfeld (HUJI). This talk will draw on work that appeared at NeurIPS 2019 and ITCS 2020\n\n\n10:50AM – 11:35AM\nHima Lakkaraju\, Harvard University\nTitle: Towards Reliable and Robust Model Explanations \nAbstract: As machine learning black boxes are increasingly being deployed in domains such as healthcare and criminal justice\, there is growing emphasis on building tools and techniques for explaining these black boxes in an interpretable manner. Such explanations are being leveraged by domain experts to diagnose systematic errors and underlying biases of black boxes. In this talk\, I will present some of our recent research that sheds light on the vulnerabilities of popular post hoc explanation techniques such as LIME and SHAP\, and also introduce novel methods to address some of these vulnerabilities. More specifically\, I will first demonstrate that these methods are brittle\, unstable\, and are vulnerable to a variety of adversarial attacks. Then\, I will discuss two solutions to address some of the vulnerabilities of these methods – (i) a framework based on adversarial training that is designed to make post hoc explanations more stable and robust to shifts in the underlying data; (ii) a Bayesian framework that captures the uncertainty associated with post hoc explanations and in turn allows us to generate explanations with user specified levels of confidences. I will conclude the talk by discussing results from real world datasets to both demonstrate the vulnerabilities in post hoc explanation techniques as well as the efficacy of our aforementioned solutions.\n\n\n11:40AM – 12:25PM\nMoran Koren\, Harvard CMSA\nTitle: A Gatekeeper’s Conundrum \nAbstract: Many selection processes contain a “gatekeeper”. The gatekeeper’s goal is to examine an applicant’s suitability to a proposed position before both parties endure substantial costs. Intuitively\, the introduction of a gatekeeper should reduce selection costs as unlikely applicants are sifted out. However\, we show that this is not always the case as the gatekeeper’s introduction inadvertently reduces the applicant’s expected costs and thus interferes with her self-selection. We study the conditions under which the gatekeeper’s presence improves the system’s efficiency and those conditions under which the gatekeeper’s presence induces inefficiency. Additionally\, we show that the gatekeeper can sometimes improve selection correctness by behaving strategically (i.e.\, ignore her private information with some probability).\n\n\n12:25PM\nConference Organizers\nClosing Remarks
URL:https://cmsa.fas.harvard.edu/event/big-data-conference-2021/
LOCATION:Virtual
CATEGORIES:Big Data Conference,Conference,Event
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/BD_21-Poster.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210901T183100
DTEND;TZID=America/New_York:20210901T193100
DTSTAMP:20260510T060812
CREATED:20240214T093606Z
LAST-MODIFIED:20240301T100331Z
UID:10002639-1630521060-1630524660@cmsa.fas.harvard.edu
SUMMARY:Naturalness and muon anomalous magnetic moment
DESCRIPTION:Title: Naturalness and muon anomalous magnetic moment \nAbstract: We study a model for explaining the apparent deviation of the muon anomalous magnetic moment\, (g-2)\, from the Standard Model expectation. There are no new scalars and hence no new hierarchy puzzles beyond those associated with the Standard model Higgs; the only new particles that are relevant for (g-2) are vector-like singlet and doublet leptons. Interestingly\, this simple model provides a calculable example violating the Wilsonian notion of naturalness: despite the absence of any symmetries prohibiting its generation\, the coefficient of the naively leading dimension-six operator for (g−2) vanishes at one-loop. While effective field theorists interpret this either as a surprising UV cancellation of power divergences\, or as a delicate cancellation between matching UV and calculable IR corrections to (g−2) from parametrically separated scales\, there is a simple explanation in the full theory: the loop integrand is a total derivative of a function vanishing in both the deep UV and IR. The leading contribution to (g−2) arises from dimension-eight operators\, and thus the required masses of new fermions are lower than naively expected\, with a sizable portion of parameter space already covered by direct searches at the LHC. All of the the viable parameter can be probed by the LHC and planned future colliders.
URL:https://cmsa.fas.harvard.edu/event/9-1-2021-quantum-matter-in-mathematics-and-physics/
LOCATION:Virtual
CATEGORIES:Quantum Matter
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210902T130000
DTEND;TZID=America/New_York:20210902T143000
DTSTAMP:20260510T060812
CREATED:20240213T112100Z
LAST-MODIFIED:20240304T084111Z
UID:10002491-1630587600-1630593000@cmsa.fas.harvard.edu
SUMMARY:Eppur si muovono: rotations in active matter
DESCRIPTION:Abstract: Living matter relies on the self organization of its components into higher order structures\, on the molecular as well as on the cellular\, organ or even organism scale. Collective motion due to active transport processes has been shown to be a promising route for attributing fascinating order formation processes on these different length scales. Here I will present recent results on structure formation on actively transported actin filaments on lipid membranes and vesicles\, as well as the cell migration induced structure formation in the developmental phase of mammary gland organoids. For both systems spherical structures with persistent collective rotations are observed.
URL:https://cmsa.fas.harvard.edu/event/eppur-si-muovono-rotations-in-active-matter/
CATEGORIES:Active Matter Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210902T183400
DTEND;TZID=America/New_York:20210902T193400
DTSTAMP:20260510T060812
CREATED:20240214T093431Z
LAST-MODIFIED:20240301T095944Z
UID:10002634-1630607640-1630611240@cmsa.fas.harvard.edu
SUMMARY:Exotic quantum matter: From lattice gauge theory to hyperbolic lattices
DESCRIPTION:Title: Exotic quantum matter: From lattice gauge theory to hyperbolic lattices \nAbstract: This talk\, in two parts\, will discuss two (unrelated) instances of exotic quantum matter. In the first part\, I will discuss quantum critical points describing possible transitions out of the Dirac spin liquid\, towards either symmetry-breaking phases or topologically ordered spin liquids. I will also comment on the role of instanton zero modes for symmetry breaking in parton gauge theories. In the second part\, I will propose an extension of Bloch band theory to hyperbolic lattices\, such as those recently realized in circuit QED experiments\, based on ideas from algebraic geometry and Riemann surface theory.
URL:https://cmsa.fas.harvard.edu/event/9-2-2021-quantum-matter-in-mathematics-and-physics/
LOCATION:Virtual
CATEGORIES:Quantum Matter
END:VEVENT
END:VCALENDAR