| Mon | Sep 08 | 05:30 | Abdus Salam-SMS Colloquium | Peter Stevenhagen | Solving the negative Pell equation | |
| Mon | Sep 08 | 06:00 | Tropical mathematics and machine learning | Susana López-Moreno | Poset Neural Networks | |
| Mon | Sep 08 | 11:15 | CAM seminar | Nikos. I. Kavallaris | Network Dynamics via Topological Data Analysis and Equation-Free Methods | |
| Mon | Sep 08 | 14:00 | Geometric and functional inequalities and applications | Gunther Uhlmann | The fractional Anisotropic Calderon Problem | |
| Mon | Sep 08 | 15:00 | European Non-Associative Algebra Seminar | Iván Ruiz Campos | The affine group scheme of the automorphisms of evolution algebras of dimension 2. | |
| Mon | Sep 08 | 15:30 | Knots and representation theory | Vladislav Kibkalo | Integrable Hamiltonian systems with noncompact foliations and bifurcations | |
| Mon | Sep 08 | 20:00 | Boston University Number Theory Seminar | Marius Leonhardt | The affine Chabauty method | |
| Mon | Sep 08 | 22:30 | SFU Mathematics of Computation, Application and Data ("MOCAD") Seminar | Charles Cheung | From PhysicsML to Physical AI | |
| Tue | Sep 09 | 01:00 | Nonlinear Analysis Seminar Series | Dr. Sung-Jin Oh | Integral formulas for under/overdetermined differential operators via recovery on curves and the finite-dimensional cokernel condition | |
| Tue | Sep 09 | 06:00 | ANU Research School of Earth Sciences HDR seminars | Geoff Bonning | The inner edge of the outer solar system: populations and processes in the formation of chondrules of the carbonaceous chondrites | |
| Tue | Sep 09 | 09:00 | NKUA HEP Seminars | Aristomenis Donos | TBA | |
| Tue | Sep 09 | 14:00 | Geometria em Lisboa (IST) | Leonardo Macarini | Existence and localization of closed magnetic geodesics with low energy | |
| Tue | Sep 09 | 14:00 | Systems Chemistry Discussion Series | Keith Andrews | Compartmentalising Catalysis | |
| Tue | Sep 09 | 15:00 | Midwest Mathematical Biology Seminar | Maliha Ahmed | TBA | |
| Tue | Sep 09 | 16:00 | Online Seminar On Undergraduate Mathematics Education | Gavin LaRose | Impacts on Student Achievement from Mastery Assessment and Course Redesign | |
| Tue | Sep 09 | 18:30 | NHETC Seminar | Ping Gao | A new probe of non-maximal quantum chaos: pole-skipping of higher spin operators | |
| Tue | Sep 09 | 19:00 | Harvard MIT Algebraic Geometry Seminar | Debaditya Raychadhury | Singularities of secant varieties | |
| Tue | Sep 09 | 20:00 | Five College Number Theory Seminar | Santiago Arango-Piñeros | Counting primitive integral solutions to generalized Fermat equations | |
| Tue | Sep 09 | 20:30 | MIT number theory seminar | Sachi Hashimoto | Rational points on $X_0(N)^*$ when $N$ is non-squarefree | |
| Wed | Sep 10 | 07:30 | Moscow-Beijing topology seminar | Nikolay Abrosimov | Volumes of non-Euclidean tetrahedra | |
| Wed | Sep 10 | 11:30 | RA Seminar | Gustavo Jasso | The Calabi-Yau Auslander-Iyama Correspondence | |
| Wed | Sep 10 | 15:00 | Topological Quantum Field Theory Club (IST, Lisbon) | Alexander Voronov | The superstring measure on the moduli spaces of genus-zero super Riemann surfaces | |
| Wed | Sep 10 | 16:00 | Metagovernance Seminar | Justin Jennings | Understanding Early Large-Scale Collectives | |
| Wed | Sep 10 | 19:00 | Noncommutative geometry in NYC | Andrei Alpeev | C*-simplicity and the Poisson boundary | |
| Wed | Sep 10 | 22:00 | University of Utah Representation Theory / Number Theory Seminar | Carsten Peterson | The multitemporal wave equation on Bruhat–Tits buildings | |
| Thu | Sep 11 | 10:00 | Online Complexity Seminar | Mikito Nanashima | Complexity-Theoretic Inductive Inference | |
| Thu | Sep 11 | 12:30 | Семінар з фрактального аналізу / Fractal analysis seminar | Mykola Pratsiovytyi | The role of Academician Volodymyr Korolyuk in the development of fractal analysis in Ukraine | |
| Thu | Sep 11 | 15:00 | Number Theory Web Seminar | Stanley Yao Xiao | Hilbert's Tenth Problem for systems of diagonal quadratic forms, and Buchi's problem | |
| Thu | Sep 11 | 17:00 | Topos Institute Colloquium | Eric Finster | Dependetopes and Higher Generalized Algebraic Theories | |
| Thu | Sep 11 | 18:00 | Online logic seminar | Mathieu Hoyrup | Computable type: an overview | |
| Thu | Sep 11 | 20:15 | CUNY Geometric Analysis Seminar | Junsheng Zhang | Kähler-Ricci Shrinkers and Polarized Fano Fibrations | |
| Thu | Sep 11 | 20:30 | STAGE | Ari Krishna + Sophie Zhu | Statements of the Weil conjectures, proof for curves via the Hodge index theorem | |
| Fri | Sep 12 | 15:30 | Relatorium seminar | Danielle Bowerman | Extension Monads: Some Structure Theorems | |
| Fri | Sep 12 | 16:00 | Ultraproducts and Number Theory | Wayne Lewis | Global Primitive Roots of Unity | |
| Fri | Sep 12 | 16:00 | GEOTOP-A seminar | Ginestra Bianconi | Topology shapes dynamics of higher-order networks and more | |
| Fri | Sep 12 | 17:00 | Geometry Webinar AmSur /AmSul | Vanderson Lima | TBA | |
| Fri | Sep 12 | 22:30 | SFU Mathematics of Computation, Application and Data ("MOCAD") Seminar | Alexandre Girouard | TBA | |
| Sat | Sep 13 | 14:05 | Knots, graphs and groups | И.Х.Сабитов | TBA | |
| Mon | Sep 15 | 00:00 | Tropical mathematics and machine learning | Aldo Guzmán-Sáenz | Topological Data Analysis and Machine Learning - an application to computational genomics | |
| Mon | Sep 15 | 14:00 | Geometric and functional inequalities and applications | Tobias Colding | TBA | |
| Mon | Sep 15 | 15:00 | European Non-Associative Algebra Seminar | Paolo Saracco | Integrals for bialgebras | |
| Mon | Sep 15 | 15:00 | Mathematical and Computational Biology Seminar Series | Yang Kuang | Promising Bio-marks from Predictive Mathematical Models of Hormone Treatment for Prostate Cancer | |
| Mon | Sep 15 | 20:00 | Boston University Number Theory Seminar | Sachi Hashimoto | Rational points on $X_0(N)^∗$ when $N$ is non-squarefree | |
| Mon | Sep 15 | 20:30 | MIT Algebraic Topology Seminar | Samuel Muñoz-Echániz | A Weiss–Williams theorem for embedding spaces and an application to diffeomorphisms of solid tori | |
| Tue | Sep 16 | 01:00 | Nonlinear Analysis Seminar Series | Dr. Bochen Liu | TBA | |
| Tue | Sep 16 | 07:00 | Tricontinental Quantum Fundamentals Seminar | Germain Tobar | Quantum metasurfaces as probes of vacuum particle content | |
| Tue | Sep 16 | 09:00 | Maths seminars at the University of Galway | Michael Flattery | (PhD Viva) | |
| Tue | Sep 16 | 13:00 | One World Combinatorics on Words Seminar | Kaisei Kishi | TBA | |
| Tue | Sep 16 | 14:00 | Florida Atlantic University Crypto Café | Dung Bui | FOLEAGE: F4OLE-Based Multi-Party Computation for Boolean Circuits | |
| Tue | Sep 16 | 15:00 | Midwest Mathematical Biology Seminar | Peter Thomas | TBA | |
| Tue | Sep 16 | 19:00 | Harvard MIT Algebraic Geometry Seminar | Hyunsuk Kim | Hodge theory of toric singularities | |
| Tue | Sep 16 | 20:00 | Five College Number Theory Seminar | John Cullinan | Explicit Arithmetic in Isogeny-Torsion Graphs | |
| Tue | Sep 16 | 20:30 | MIT number theory seminar | Mikayel Mkrtchyan | TBA | |
| Wed | Sep 17 | 04:00 | UNSW Number Theory Seminar | Lewis Combes | TBA | |
| Wed | Sep 17 | 05:00 | UNSW Number Theory Seminar | Alexander Fish | TBA | |
| Wed | Sep 17 | 07:30 | Moscow-Beijing topology seminar | Eiji Ogasa | TBA | |
| Wed | Sep 17 | 09:00 | Topological Quantum Field Theory Club (IST, Lisbon) | Dionne Ibarra | Octahedral fully augmented links and the TV volume conjecture | |
| Wed | Sep 17 | 11:00 | Maths seminars at the University of Galway | Paul Levy | Contact: Michael Tuite | |
| Wed | Sep 17 | 12:00 | NCTS international Geometric Measure Theory seminar | Gianmarco Caldini | On smooth approximation of integral cycles | |
| Wed | Sep 17 | 16:00 | Virtual seminar on geometry with symmetries | Oliver Goertsches | On torus equivariant $S^4$-bundles over $S^4$ and Petrie-type Questions for GKM Manifolds | |
| Wed | Sep 17 | 19:00 | Harvard number theory seminar | Jit Wu Yap | TBA | |
| Wed | Sep 17 | 19:00 | Noncommutative geometry in NYC | Alastair Hamilton | Noncommutative geometry in effective field theory and large N phenomena | |
| Wed | Sep 17 | 22:00 | University of Utah Representation Theory / Number Theory Seminar | Noy Soffer Aranov | The Minimal Denominator in Function Fields | |
| Thu | Sep 18 | 03:00 | ANU Research School of Earth Sciences school seminar | Ron Hackey (RSES) | A grand finale: IODP Expedition 405 tracking tsunamigenic slip across the Japan Trench – and testing whether flexural rigidity controls slip extent during giant earthquakes | |
| Thu | Sep 18 | 14:30 | Gothenburg PhD seminar | Erik Jansson | How to compute the polar factorization of a matrix in a way you shouldn't | |
| Thu | Sep 18 | 15:00 | Number Theory Web Seminar | Ashvin A. Swaminathan | TBA | |
| Thu | Sep 18 | 17:00 | Topos Institute Colloquium | Maru Sarazola | Double categorical equivalences | |
| Thu | Sep 18 | 17:00 | Art and Math Seminar | Edmund Harriss | Genuine Pretending: Philosophies for mathematics and art | |
| Thu | Sep 18 | 18:00 | Online logic seminar | John Goodrick | Expansions of ordered Abelian groups by unary predicates | |
| Thu | Sep 18 | 20:30 | SFU NT-AG seminar | Fabien Pazuki | TBA | |
| Thu | Sep 18 | 20:30 | STAGE | Yutong Chen | The étale site | |
| Fri | Sep 19 | 07:00 | Europe and Pacific Theoretical Physics | Jesse Woods | Defining QFT Categorically I | |
| Fri | Sep 19 | 13:00 | Algebraic and Combinatorial Perspectives in the Mathematical Sciences | Lorenzo Clemente | TBA | |
| Fri | Sep 19 | 13:00 | TCS + Combinatorics Joint Seminar Birmingham | Thomas Sauerwald | Balanced Allocations: The Power of Choice versus Noise | |
| Fri | Sep 19 | 16:00 | GEOTOP-A seminar | Christine Heitsch | TBA | |
| Fri | Sep 19 | 17:45 | Richmond Geometry Meeting 2025 | Welcome Message | Welcome Message | |
| Fri | Sep 19 | 18:00 | Richmond Geometry Meeting 2025 | Rhea Palak Bakshi | TBA | |
| Fri | Sep 19 | 20:00 | Richmond Geometry Meeting 2025 | Christine Ruey Shan Lee | TBA | |
| Fri | Sep 19 | 21:30 | Richmond Geometry Meeting 2025 | Mikhail Khovanov | TBA | |
| Sat | Sep 20 | 12:30 | Richmond Geometry Meeting 2025 | Boyu Zhang | TBA | |
| Sat | Sep 20 | 14:00 | Richmond Geometry Meeting 2025 | Matthew Stoffregen | TBA | |
| Sat | Sep 20 | 15:30 | Richmond Geometry Meeting 2025 | Career Panel | Career Panel | |
| Sat | Sep 20 | 18:00 | Richmond Geometry Meeting 2025 | Denis Auroux | TBA | |
| Sat | Sep 20 | 19:30 | Richmond Geometry Meeting 2025 | Ludmil Katzarkov | TBA | |
| Sat | Sep 20 | 21:30 | Richmond Geometry Meeting 2025 | Poster Session | Poster Session | |
| Sun | Sep 21 | 13:30 | Richmond Geometry Meeting 2025 | Richard A. Wentworth | TBA | |
| Sun | Sep 21 | 15:00 | Richmond Geometry Meeting 2025 | Yuya Murakami | TBA | |
| Sun | Sep 21 | 17:30 | Richmond Geometry Meeting 2025 | Mrunmay Jagadale | TBA | |
| Mon | Sep 22 | 11:15 | CAM seminar | Martin Hermann (moved to 24.09,13:15-14:00) | TBA | |
| Mon | Sep 22 | 12:00 | Paris algebra seminar | Merlin Christ | TBA | |
| Mon | Sep 22 | 14:00 | Geometric and functional inequalities and applications | Anna Mazzucato | On the Euler equations with in-flow and out-flow boundary conditions | |
| Mon | Sep 22 | 15:00 | European Non-Associative Algebra Seminar | Alessio Marrani | Okubo Algebra: a new approach to Quantum Chromodynamics? | |
| Mon | Sep 22 | 20:00 | Boston University Number Theory Seminar | TBA | TBA | |
| Mon | Sep 22 | 20:30 | MIT Algebraic Topology Seminar | Mark Behrens | TBA | |
| Mon | Sep 22 | 22:30 | SFU Mathematics of Computation, Application and Data ("MOCAD") Seminar | Sheehan Olver | TBA | |
| Tue | Sep 23 | 07:00 | Nonlinear Analysis Seminar Series | Dr. Elia Brué | Non-Uniqueness and Flexibility in Two-Dimensional Euler Equations | |
| Tue | Sep 23 | 12:00 | One World Numeration seminar | Vilmos Komornik | TBA | |
| Tue | Sep 23 | 13:00 | ItaCa Fest 2025 | B. M. Bumpus | TBA | |
| Tue | Sep 23 | 13:40 | ItaCa Fest 2025 | R. Van Belle | TBA | |
| Tue | Sep 23 | 14:20 | ItaCa Fest 2025 | TBA | TBA | |
