| 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 | On the first min-max width of hyperbolic surfaces | |
| Fri | Sep 12 | 22:30 | SFU Mathematics of Computation, Application and Data ("MOCAD") Seminar | Alexandre Girouard | The exterior Steklov problem for Euclidean domains | |
| 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 | 10:30 | NKUA HEP Seminars | Μαρία Γεροντίδου | Μετρητές Νετρονίων: Θεμελιώδης Έρευνα και Εφαρμογές | |
| Mon | Sep 15 | 12:00 | NKUA HEP Seminars | Αντώνης Αγαπητός | Advancing LHC physics with ML: Recent CMS results in boosted topologies, jet tagging, and beyond | |
| Mon | Sep 15 | 14:00 | Geometric and functional inequalities and applications | No Talk | 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 | 15:30 | Knots and representation theory | M. Ivanov | TBA | |
| 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 (rescheduled) | |
| Tue | Sep 16 | 07:00 | NKUA HEP Seminars | Ευστάθιος Καρέντζος | Ενοποιώντας Συστήματα, Ανιχνευτές και Ανάλυση με Μηχανική Μάθηση: Μια Ερευνητική Διαδρομή στο Μιονικό Φασματόμετρο του πειράματος ATLAS | |
| Tue | Sep 16 | 08:30 | NKUA HEP Seminars | Γεώργιος Κριντήρας | Το άλλο 95%: Αναζητώντας την προέλευση της μάζας | |
| Tue | Sep 16 | 09:00 | Maths seminars at the University of Galway | Michael Flattery | (PhD Viva) | |
| Tue | Sep 16 | 10:30 | NKUA HEP Seminars | Στυλιανός Αγγελιδάκης | Ανακατασκευή & Συνδυασμένη Απόδοση Μιονίων για το Πρόγραμμα Φυσικής του ATLAS | |
| Tue | Sep 16 | 12:00 | NKUA HEP Seminars | Δήμητρα Τσιώνου | Μετρήσεις ακρίβειας με ανιχνευτές στοιχειωδών σωματιδίων | |
| Tue | Sep 16 | 13:00 | One World Combinatorics on Words Seminar | Kaisei Kishi | Net Occurrences in Fibonacci and Thue-Morse Words | |
| 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 | Higher Siegel-Weil formula for unitary groups over function fields: case of corank-1 coefficients | |
| Wed | Sep 17 | 04:00 | UNSW Number Theory Seminar | Lewis Combes | Selmer groups for mod p Galois representations | |
| Wed | Sep 17 | 05:00 | UNSW Number Theory Seminar | Alexander Fish | Ehrhart spectra of large subsets in $\Z^n$ | |
| 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 | On Uniform Boundedness of Torsion Points for Abelian Varieties over Function Fields | |
| 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 | Second moments for 2-Selmer groups and 2-class groups | |
| 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 | 12:00 | Monthly Global Diffeology Seminar | Katsuhiko Kuribayashi | Toward Riemannian diffeology | |
| Fri | Sep 19 | 13:00 | Algebraic and Combinatorial Perspectives in the Mathematical Sciences | Lorenzo Clemente | Algorithmic analysis of control systems with affine input and polynomial state dynamics | |
| 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 | On barrier height and other problems in RNA branching landscapes | |
| 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 | Skein Modules and Their Structure | |
| 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 | 14:05 | Knots, graphs and groups | Olga Frolkina | О связи свойств компактного подмножества $\mathbb{R}^N$ и его проекций | |
| Sat | Sep 20 | 15:30 | Richmond Geometry Meeting 2025 | Career Panel | Career Panel | |
| Sat | Sep 20 | 18:00 | Richmond Geometry Meeting 2025 | Denis Auroux | Lagrangian Floer theory, from local to global | |
| 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 | Higgs bundles, isomonodromy, and minimal surfaces | |
| Sun | Sep 21 | 15:00 | Richmond Geometry Meeting 2025 | Yuya Murakami | Witten’s aymptotic expansion conjecture and quantum modularity for Gukov–Pei–Putrov–Vafa invariants | |
| 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 | Cluster tilting in topological Fukaya categories for higher Teichmüller theory | |
| Mon | Sep 22 | 13:00 | Carleton-Ottawa Number Theory seminar | Brandon Hansson | Arithmetic combinatorics from high-dimensional probability | |
| 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 | A $C_3$-equivariant Snaith construction | |
| 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 | |
| Tue | Sep 23 | 15:00 | Midwest Mathematical Biology Seminar | Maxwell Kreider | TBA | |
| Tue | Sep 23 | 18:30 | NHETC Seminar | Brandon Rayhaun | TBA | |
| Tue | Sep 23 | 19:00 | Harvard MIT Algebraic Geometry Seminar | Sam Grushevsky | TBA | |
| Tue | Sep 23 | 20:00 | Five College Number Theory Seminar | Nicole Looper | TBA | |
| Tue | Sep 23 | 20:30 | MIT number theory seminar | Jeff Achter | TBA | |
| Wed | Sep 24 | 07:30 | Moscow-Beijing topology seminar | Ueki Jun | TBA | |
| Wed | Sep 24 | 12:00 | Longitudinal Algebra and Geometry Open ONline Seminar (LAGOON) | Jon Pridham | TBA | |
| Wed | Sep 24 | 19:00 | Harvard number theory seminar | Daniel Li-Huerta | Close fields and the local Langlands correspondence | |
| Wed | Sep 24 | 19:00 | Noncommutative geometry in NYC | Jananan Arulseelan | TBA | |
| Wed | Sep 24 | 22:00 | University of Utah Representation Theory / Number Theory Seminar | Jessica Fintzen | TBA | |
| Thu | Sep 25 | 00:00 | Postech-PMI Number Theory Seminar | Ryan Chen | Near-center derivatives and arithmetic 1-cycles | |
| Thu | Sep 25 | 05:00 | Computational algebra seminar | Florian Breuer | TBA | |
| Thu | Sep 25 | 15:00 | Number Theory Web Seminar | Mariusz Lemańczyk | TBA | |
| Thu | Sep 25 | 17:00 | Topos Institute Colloquium | Fosco Loregian | A double category of transducers | |
