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DTSTART;TZID=America/New_York:20261005T163000
DTEND;TZID=America/New_York:20261005T173000
DTSTAMP:20260930T203843Z
CREATED:20260729T184527Z
LAST-MODIFIED:20260930T203843Z
UID:10003983-1791217800-1791221400@cmsa.fas.harvard.edu
SUMMARY:Spectral Methods for signal recovery in multi-modal problems
DESCRIPTION:Colloquium \nSpeaker: Subhabrata Sen\, Harvard Statistics \nTitle: Spectral Methods for signal recovery in multi-modal problems \nAbstract: Motivated by multi-modal estimation\, we will study a multi-view spiked random matrix model in which several noisy matrix observations contain correlated spikes. We will introduce a new spectral method for signal recovery in this setting and characterize the behavior of the top eigenvalue and the associated eigenvector. Our results will identify the sharp threshold for signal recovery in this problem. We will discuss broader implications for multi-modal data analysis. \nBased on joint work with Xiaodong Yang and Yue M. Lu.
URL:https://cmsa.fas.harvard.edu/event/colloquium_10526/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/2026/07/CMSA-Colloquium-10.5.2026.docx-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261026T163000
DTEND;TZID=America/New_York:20261026T173000
DTSTAMP:20260913T171707Z
CREATED:20260729T200800Z
LAST-MODIFIED:20260913T171707Z
UID:10004030-1793032200-1793035800@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Anar Akhmedov\, University of Minnesota
URL:https://cmsa.fas.harvard.edu/event/colloquium-102626/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261102T163000
DTEND;TZID=America/New_York:20261102T173000
DTSTAMP:20260903T143728Z
CREATED:20260729T200831Z
LAST-MODIFIED:20260903T143728Z
UID:10004031-1793637000-1793640600@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Ivan Corwin (Columbia University)
URL:https://cmsa.fas.harvard.edu/event/colloquium-11226/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261109T163000
DTEND;TZID=America/New_York:20261109T173000
DTSTAMP:20260915T153408Z
CREATED:20260729T200854Z
LAST-MODIFIED:20260915T153408Z
UID:10004032-1794241800-1794245400@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Lukas Müller (LMU Munich)
URL:https://cmsa.fas.harvard.edu/event/colloquium-11926/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261116T163000
DTEND;TZID=America/New_York:20261116T173000
DTSTAMP:20261001T144250Z
CREATED:20260729T200924Z
LAST-MODIFIED:20261001T144250Z
UID:10004033-1794846600-1794850200@cmsa.fas.harvard.edu
SUMMARY:Snake graphs and q-deformed real numbers
DESCRIPTION:Colloquium \nSpeaker: James Propp (UMass Lowell) \nTitle: Snake graphs and q-deformed real numbers \nAbstract: I’ll present a statistical-mechanical construction of q-deformed real numbers [[x]]_q\, inspired by the q-deformed rational numbers [x]_q of Morier-Genoud and Ovsienko. The new construction admits two equivalent formulations: one in terms of random filters in snake posets and the other in terms of random dimer covers of snake graphs. \nI’ll begin with a combinatorial approach to Stern’s diatomic series and the Calkin–Wilf bijection via finite snake graphs\, and then construct q-deformed rational numbers by introducing an activity parameter q into the model. I extend from q-deformed rationals to q-deformed reals by passing from finite to infinite snake graphs; the main technical step is to show that the associated limiting probability measures are well defined. \nThe resulting q-deformation [[x]]_q satisfies [[x]]_1 = x for all x>0. There’s evidence that\, wherever both [x]_q and [[x]]_q are defined\, [[x]]_q = q [x]_q. For more details\, see arXiv:2607.14332.
URL:https://cmsa.fas.harvard.edu/event/colloquium-111626/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/2026/07/CMSA-Colloquium-11.16.2026.docx-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261123T163000
DTEND;TZID=America/New_York:20261123T173000
DTSTAMP:20260918T181326Z
CREATED:20260729T200958Z
LAST-MODIFIED:20260918T181326Z
UID:10004034-1795451400-1795455000@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Ewain Gwynne\, U Chicago
URL:https://cmsa.fas.harvard.edu/event/colloquium-112326/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261130T163000
DTEND;TZID=America/New_York:20261130T173000
DTSTAMP:20260729T201026Z
CREATED:20260729T201026Z
LAST-MODIFIED:20260729T201026Z
UID:10004035-1796056200-1796059800@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium
URL:https://cmsa.fas.harvard.edu/event/colloquium-113026/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261207T163000
DTEND;TZID=America/New_York:20261207T173000
DTSTAMP:20260917T152720Z
CREATED:20260729T201051Z
LAST-MODIFIED:20260917T152720Z
UID:10004036-1796661000-1796664600@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Roberto De Leo\, Howard University
URL:https://cmsa.fas.harvard.edu/event/colloquium-12726/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20270201T163000
DTEND;TZID=America/New_York:20270201T173000
DTSTAMP:20260924T184143Z
CREATED:20260924T184143Z
LAST-MODIFIED:20260924T184143Z
UID:10004049-1801499400-1801503000@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Nina Holden (NYU)
URL:https://cmsa.fas.harvard.edu/event/colloquium_2127/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20270208T163000
DTEND;TZID=America/New_York:20270208T173000
DTSTAMP:20260922T153454Z
CREATED:20260922T152756Z
LAST-MODIFIED:20260922T153454Z
UID:10004048-1802104200-1802107800@cmsa.fas.harvard.edu
SUMMARY:Colloquium
DESCRIPTION:Colloquium \nSpeaker: Giulio Biroli\, ENS Paris
URL:https://cmsa.fas.harvard.edu/event/colloquium-2727/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Colloquium
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