Published on Department of Mathematics Calendar (https://calendar.math.yale.edu)

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Week of November 16, 2025

November 17, 2025
Geometric Analysis and Application [3] TBA Wenshuai Jiang - Zhejiang University 3:45pm -
KT 906
Group Actions and Dynamics [4] TBA Alek Skenderi - University of Wisconsin, Madison 4:00pm -
KT 203
November 18, 2025
Geometry & Topology [5] Stretch Factors on Infinite-Type Surfaces Paige Hillen - University of Wisconsin, Madison 4:30pm -
KT 207
November 19, 2025
Colloquium [6] TBA Van Vu - Yale University 4:00pm -
KT 101
November 20, 2025
Quantum Topology and Field Theory [7] TBA Scott Collier - Syracuse University 4:30pm -
KT 801
November 21, 2025
Friday Morning Seminar [8] Friday Morning Seminar 10:00am -
KT 801

Abstracts

Week of November 16, 2025

November 17, 2025
Geometric Analysis and Application [3] TBA 3:45pm -
KT 906

TBA
Group Actions and Dynamics [4] TBA 4:00pm -
KT 203

TBA
November 18, 2025
Geometry & Topology [5] Stretch Factors on Infinite-Type Surfaces 4:30pm -
KT 207

Given a finite-type surface S, it is still unknown exactly which numbers occur as stretch factors of pseudo-Anosov maps on S. It appears there is more flexibility in producing a homeomorphism with a given stretch factor if we allow for the surface to be infinite-type. I’ll discuss current work with Marissa Loving and Chenxi Wu showing every weak Perron number is the stretch factor of some end-periodic homeomorphism on some infinite-type surface.
November 19, 2025
Colloquium [6] TBA 4:00pm -
KT 101

TBA
November 20, 2025
Quantum Topology and Field Theory [7] TBA 4:30pm -
KT 801

TBA
November 21, 2025
Friday Morning Seminar [8] Friday Morning Seminar 10:00am -
KT 801

We have impromptu and (sometimes) scheduled talks, on topics in probability, combinatorics, geometry, and dynamics.

Everyone is welcome! 
Visit our web site at http://math.yale.edu for updates and special announcements

Links
[1] https://calendar.math.yale.edu/list/calendar/grid/week/2025-W46 [2] https://calendar.math.yale.edu/list/calendar/grid/week/2025-W48 [3] https://calendar.math.yale.edu/seminars/geometric-analysis-and-application [4] https://calendar.math.yale.edu/seminars/group-actions-and-dynamics [5] https://calendar.math.yale.edu/seminars/geometry-topology [6] https://calendar.math.yale.edu/seminars/colloquium [7] https://calendar.math.yale.edu/seminars/quantum-topology-and-field-theory [8] https://calendar.math.yale.edu/seminars/friday-morning-seminar [9] https://calendar.math.yale.edu/list/calendar/grid/week/abstract/2025-W46 [10] https://calendar.math.yale.edu/list/calendar/grid/week/abstract/2025-W48