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X-WR-CALDESC:Events for Claremont Center for the Mathematical Sciences
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DTSTART;TZID=America/Los_Angeles:20260323T161500
DTEND;TZID=America/Los_Angeles:20260323T171500
DTSTAMP:20260423T071631
CREATED:20260320T193527Z
LAST-MODIFIED:20260320T193527Z
UID:4056-1774282500-1774286100@colleges.claremont.edu
SUMMARY:A Regularity Criterion for the 3-D Navier-Stokes Equations Based on Finitely Many Observations (Abhishek Balakrishna\, USC)
DESCRIPTION:Abstract: This talk presents a regularity criterion for the three-dimensional Navier–Stokes equations based on finitely many observations of the flow. Motivated by data assimilation\, we study a nudging algorithm that incorporates coarse spatial measurements through general interpolation operators. \nWe show that suitable conditions on the observed data guarantee global regularity of the associated system and yield an exponential tracking property. As a consequence\, we obtain a new regularity criterion for weak solutions formulated entirely in terms of finitely many observables\, covering modal\, volume\, and nodal measurements.
URL:https://colleges.claremont.edu/ccms/event/a-regularity-criterion-for-the-3-d-navier-stokes-equations-based-on-finitely-many-observations-abhishek-balakrishna-usc/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
ORGANIZER;CN="Ryan Aschoff":MAILTO:ryan.aschoff@cgu.edu
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260324T121500
DTEND;TZID=America/Los_Angeles:20260324T131000
DTSTAMP:20260423T071631
CREATED:20260209T235439Z
LAST-MODIFIED:20260226T211019Z
UID:3991-1774354500-1774357800@colleges.claremont.edu
SUMMARY:Computing certificates for complete positivity (Achill Schürmann\, University of Rostock)
DESCRIPTION:A key problem in computer proofs based on solutions from copositive optimization\, is checking whether or not a given quadratic form is completely positive or not. In this talk we describe the first known algorithm for arbitrary rational input. It is based on a suitable adaption of Voronoi’s Algorithm and the underlying theory from positive definite to copositive quadratic forms. We observe several similarities with the classical theory\, but also some differences\, in particular for three and more variables. A key element and currently the main bottleneck in our algorithm is an adapted shortest vector computation\, asking for all nonnegative integer vectors attaining the copositive minimum of a given copositive quadratic form. \n(based on joint work with Valentin Dannenberg\, Alexander Oertel\, Mathieu Dutour Sikiric and Frank Vallentin)
URL:https://colleges.claremont.edu/ccms/event/antc-talk-achill-schurmann-university-of-rostock/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
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DTSTART;TZID=America/Los_Angeles:20260324T161500
DTEND;TZID=America/Los_Angeles:20260324T171500
DTSTAMP:20260423T071631
CREATED:20260316T040720Z
LAST-MODIFIED:20260316T040956Z
UID:4048-1774368900-1774372500@colleges.claremont.edu
SUMMARY:Analysis Seminar: Metrics on quantum channels from noncommutative geometry (Tron Omland\, University of Oslo and Norwegian National Security Authority)
DESCRIPTION:Abstract: We study metrics on completely positive maps\, and in particular on quantum channels\, induced by seminorms from noncommutative geometry. Using an infinite-dimensional analogue of the Choi–Jamiołkowski correspondence\, we construct such metrics and show that\, under suitable assumptions\, they satisfy stability and chaining. I will present the main ideas and explain how spectral triples and related constructions give rise to distances between quantum processes. This is joint work with Austad\, Bedos\, Eidesen\, and Larsen.
URL:https://colleges.claremont.edu/ccms/event/analysis-seminar-metrics-on-quantum-channels-from-noncommutative-geometry-tron-omland-university-of-oslo-and-norwegian-national-security-authority/
LOCATION:Estella 2099\, Pomona College\, 610 N. College Ave.\, Claremont\, CA\, United States
CATEGORIES:Analysis Seminar
ORGANIZER;CN="Asuman Aksoy":MAILTO:asuman.aksoy@claremontmckenna.edu
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260327T110000
DTEND;TZID=America/Los_Angeles:20260327T121500
DTSTAMP:20260423T071631
CREATED:20260110T234844Z
LAST-MODIFIED:20260313T054308Z
UID:3953-1774609200-1774613700@colleges.claremont.edu
SUMMARY:NO CCMS Colloquium - Cesar Chavez Day
DESCRIPTION:
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-3/
LOCATION:Davidson Lecture Hall\, CMC\, 340 E 9th St\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Sam Nelson":MAILTO:snelson@cmc.edu
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