Thu | May 13 | **15:00** | Quantum Gravity and All of That | Roger Penrose | Why Resolving the Singularity Problem of General Relativity is Not Just a Quantum Gravity Issue | |

Thu | May 13 | **16:00** | International Zoom Inverse Problems Seminar, UC Irvine | Tony Liimatainen | Linearized Calderón problem and exponentially accurate quasimodes for analytic manifolds | |

Thu | May 13 | **16:00** | Recent Advances in Modern p-Adic Geometry (RAMpAGe) | Alex Youcis | Geometric coverings of rigid spaces | |

Thu | May 13 | **16:30** | Online Northeast PDE and Analysis Seminar | Cyrill Muratov | TBA | |

Thu | May 13 | 17:00 | LieJor Online Seminar: Algebras, representations, and applications | Alistair Savage | Affine Hecke algebras and the elliptic Hall algebra | |

Thu | May 13 | 17:00 | ViBraNT (Virtual Brazilian Number Theory seminar) | Daniel Fiorilli | Higher moments of primes in intervals and in arithmetic progressions | |

Thu | May 13 | 17:00 | Topos Institute Colloquium | Maria Emilia Maietti | Quotient completions for topos-like structures | |

Thu | May 13 | 17:00 | Algebraic and enumerative combinatorics seminar | Christian Bean | Automating the enumeration of pattern-avoiding permutations | |

Thu | May 13 | 17:30 | Seminario de Geometría Diferencial: Córdoba, Argentina | Gabriela Ovando | The geodesic flow on Lie groups | |

Thu | May 13 | 18:00 | Seminario Latinoamericano de Teoría de Números | Santiago Molina | Waldspurger formula in higher cohomology | |

Thu | May 13 | 18:00 | Online logic seminar | Andrés Villaveces | A partition relation for well-founded trees by Komjáth and Shelah, and two applications to model theory. | |

Thu | May 13 | 18:00 | UCLA Algebra Seminar | Fumiaki Suzuki | An O-acyclic variety of even index | |

Thu | May 13 | 19:00 | Rocky Mountain Rep Theory Seminar | Cris Negron | Quantum SL(2) and logarithmic vertex operator algebras at (p,1)-central charge | |

Thu | May 13 | 20:00 | CUNY Geometric Analysis Seminar | Max Hallgren | Ricci Flow with a Lower Bound on Ricci Curvature and Volume | |

Thu | May 13 | 20:30 | Fellowship of the Ring | Karen Smith | Extremal singularities in prime characteristic | |

Thu | May 13 | 20:30 | Princeton/IAS number theory seminar | Maksym Radziwiłł | Expansion and parity | |

Thu | May 13 | 21:00 | UCSD number theory seminar | Sean Howe | Bialgebraicity in local Shimura varieties | |

Fri | May 14 | 08:00 | Beijing Moscow Mathematics Colloquium | Stefan Nemirovski | Lorentz geometry and contact topology | |

Fri | May 14 | 08:00 | IBS-CGP Mathematical Physics Seminar | Johannes Walcher | On the rationality of MUMs and 2-functions | |

Fri | May 14 | 08:00 | Topological Quantum Field Theory Club (IST, Lisbon) | Si Li | Geometry of Localized Effective Theories and Algebraic Index | |

Fri | May 14 | 08:15 | Dynamical systems seminar at the Jagiellonian University | Alexandre Trilles | Topological stability of iterated function systems | |

Fri | May 14 | 08:15 | Theory of Markov Semigroups and Schrödinger Operators | Jacek Małecki | Archimedes principle for ideal gas | |

Fri | May 14 | 09:00 | Beijing Moscow Mathematics Colloquium | Wenshuai Jiang | Gromov-Hausdorff limit of manifolds and some applications | |

Fri | May 14 | 09:00 | ZORP (zoom on rational points) | Margherita Pagano | An example of Brauer-Manin obstruction to weak approximation at a prime with good reduction | |

Fri | May 14 | 09:30 | LETHEP seminars | Diptarka Das | Some universal aspects in out-of-equilibrium physics (Lecture 2) | |

Fri | May 14 | 10:00 | Algebra and Logic Seminar | Vesselin Drensky | Non-finitely based and limit varieties of algebraic systems | |

Fri | May 14 | 10:00 | ZORP (zoom on rational points) | Alexandre Lartaux | On the number of ideals with norm a binary form of degree 3 | |

Fri | May 14 | 10:15 | Knot theory seminar in Warsaw | Guillem Cazassus | Hopf algebras, equivariant Lagrangian Floer homology, and cornered instanton theory | |

Fri | May 14 | 12:00 | From 3-manifold invariants to number theory | Don Zagier | From 3-manifold invariants to number theory | |

Fri | May 14 | 12:00 | Budapest Big Seminar on Combinatorics + Geometry | Balázs Keszegh | On tangencies among planar curves | |

Fri | May 14 | 12:00 | Computer Physics and Quantum Informatics Seminar | Cesar Fernandez-Ramirez | Statistical techniques for model selection and physics interpretation in particle physics | |

Fri | May 14 | 12:00 | IIT Bombay Virtual Commutative Algebra Seminar | Tim Roemer | Cut and related polytopes in commutative algebra | |

Fri | May 14 | 12:15 | EXACT - (KRAKOW - POZNAN - WARSAW) Field Theory | Katarzyna Rejzner | Thermal states in Sine-Gordon model in Lorentzian signature | |

Fri | May 14 | 12:30 | The London geometry and topology seminar | Michael Magee | Spectral Gaps of Random Covers of Surfaces | |

Fri | May 14 | 12:30 | ZORP (zoom on rational points) | Samir Siksek | Integral points on punctured curves and punctured abelian varieties | |

Fri | May 14 | 13:00 | Functional analysis and operator algebras in Athens | Matthew Daws | Purely infinite algebras and ultrapowers | |

Fri | May 14 | 13:00 | May 12 in Rome: celebrating women in mathematics | Maria Colombo | The Transport Equation (with an opening address by Roberta Fulci) | |

Fri | May 14 | 13:00 | Applied Algebra and Analysis Online Seminar | Carlos Beltrán | Measuring the sensibility of numerical problems, including your favourite one | |

Fri | May 14 | 13:00 | Warwick Combinatorics Seminar | Pascal Schweitzer | Automorphisms of graphs with a forbidden minor | |

Fri | May 14 | 13:00 | Zoominar in Dynamical Systems @ Porto | Polina Vytnova | Computing Hausdorff dimension of Bernoulli convolutions | |

Fri | May 14 | 13:15 | Symplectic zoominar | Daniel Álvarez-Gavela | Caustics of Lagrangian homotopy spheres with stably trivial Gauss map | |

Fri | May 14 | 13:30 | Online Weekly Research Seminar for Early Career Mathematicians from India | Jaitra Chattopadhyay | Simultaneous divisibility and indivisibility properties of class numbers of quadratic fields | |

Fri | May 14 | 14:00 | Banach spaces webinars | Marek Cúth | Lipschitz-free $p$-spaces | |

Fri | May 14 | 14:00 | Geometry and Physics @ Lisbon | Stéphane Guillermou | Stable Gauss map of nearby Lagrangians | |

Fri | May 14 | 14:00 | Basic Problems in Quantum Information | Caslov Brukner | Quantum causality: fundamentals and quantum information applications | |

Fri | May 14 | 14:00 | Cologne Number Theory Seminars | George Andrews | How Ramanujan May Have Discovered of the Mock Theta Functions | |

Fri | May 14 | 14:00 | Resistência dinâmica (Dynamical resistance) | Meysan Nassiri | TBA | |

Fri | May 14 | 14:00 | Pure Mathematics Colloquium at Southampton | Goulnara Arzhantseva | Approximations of infinite groups | |

Fri | May 14 | 14:00 | ZORP (zoom on rational points) | Alec Shute | Sums of four squareful numbers | |

Fri | May 14 | 14:15 | St. Petersburg algebraic groups seminar | Andrei Rapinchuk | Groups with bounded generation: old and new | |

Fri | May 14 | 14:30 | Rutgers Seminar on Complex Analysis, Harmonic Analysis and Complex Geometry | Yum-Tong Siu | Global non-deformability, super rigidity, and rigidity of vector bundles and CR manifolds | |

Fri | May 14 | 15:00 | CRM - Séminaire du CIRGET / Géométrie et Topologie | Ziwen Zhu | Equivariant K-stability and valuative criteria | |

Fri | May 14 | 15:00 | Distinguished Lecture Series 2021 - Amie Wilkinson | Amie Wilkinson | TBA | |

Fri | May 14 | 15:00 | Logic Supergroup | Francesca Boccuni & Luca Zanetti | How to Hamlet a Caesar | |

Fri | May 14 | 15:00 | CRM-Montreal analysis Seminar | Michael Lipnowski | TBA | |

Fri | May 14 | 15:00 | Stochastics and Statistics Seminar Series | Ann Lee | Likelihood-Free Frequentist Inference | |

Fri | May 14 | 15:15 | Basic Problems in Quantum Information | Jaroslaw Korbicz | Spectrum Broadcast Structures And Quantum Origins Of Objectivity | |

Fri | May 14 | 15:30 | Séminaire de géométrie arithmétique et motivique (Paris Nord) | Alexander Petrov | Automatic de Rhamness of arithmetic local systems | |

Fri | May 14 | 16:30 | Probability and the City Seminar | Konstantin Matetski | Directed mean curvature flow in noisy environment | |

Fri | May 14 | 17:00 | Columbia algebraic geometry seminar | Aline Zanardini | Stability of pencils of plane curves | |

Fri | May 14 | 17:00 | Cibercoloquio Latinoamericano de Matemáticas | Alberto Verjovsky | Grupos modulares y orbifolds usando los cuaterniones | |

Fri | May 14 | 17:00 | STAGE | Zhiyu Zhang | Perfections in mixed characteristic | |

Fri | May 14 | 17:00 | Seminario de álgebra, combinatoria y teoría de Lie | Alfredo Álzaga | Dependent Type Theory - Una Introducción | |

Fri | May 14 | 17:30 | Basic Problems in Quantum Information | Iman Marvian | Locality and Symmetry Through the Lens of Quantum Information | |

Fri | May 14 | 17:45 | Princeton HET seminar | Anatoly Dymarsky | TBA | |

Fri | May 14 | 18:00 | CUNY Harmonic Analysis and PDE's Seminar | Emily J. King | Mathematical analysis of neural networks | |

Fri | May 14 | 18:00 | Global Noncommutative Geometry Seminar (Americas) | Nikita Sopenko | Invertible states of quantum lattice spin systems and their invariants | |

Fri | May 14 | 18:00 | UCSB Seminar on Geometry and Arithmetic | Adel Betina | Eisenstein intersection points on the Hilbert Eigenvariety | |

Fri | May 14 | 18:45 | Basic Problems in Quantum Information | Jess Riedel | Wavefunction branches | |

Fri | May 14 | 19:00 | Stanford algebraic geometry seminar | Joachim Jelisiejew | Pathologies on the Hilbert scheme of points | |

Fri | May 14 | 22:00 | Analysis and Geometry Seminar | Trang Thi Thien Nguyen | Non-homogeneous T(1) theorem for singular integrals on product quasimetric spaces | |

Fri | May 14 | 22:00 | Caltech geometry/topology seminar | Artem Kotelskiy | Khovanov homology via Floer theory of the 4-punctured sphere | |

Sat | May 15 | 00:00 | Automorphic Project & Research Seminar | Masao Oi | Geometric L-packets of Howe-unramified toral supercuspidal representations I | |

Sun | May 16 | 11:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Gang Tian | Ricci flow on Fano manifolds | |

Sun | May 16 | 12:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Xingwang Xu | Gauss curvature flow on 2-sphere | |

Sun | May 16 | 13:00 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Yuxin Ge | On conformally compact Einstein manifolds | |

Sun | May 16 | 13:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Juncheng Wei | Singularities formations in some geometric flows | |

Sun | May 16 | 14:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Paul Yang | Quasiconformal maps on the 4-sphere | |

Sun | May 16 | 15:00 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Eric Chen | The Yamabe flow on asymptotically flat manifolds | |

Mon | May 17 | 01:00 | IBS-CGP weekly zoom seminar | Xujia Chen | Lifting cobordisms and Kontsevich-type recursions for counts of real curves | |

Mon | May 17 | 02:00 | BIMSA Geometry and Physics Seminars | Jim Halverson | Complexity, Physics, and Effective Theories of Deep Learning 1 | |

Mon | May 17 | 06:30 | Arithmetic Monday | David Hansen | Local Shimura varieties and their cohomology | |

Mon | May 17 | 08:00 | French-Korean webinar in number theory | Riccardo Pengo | Entanglement in the family of division fields of a CM elliptic curve | |

Mon | May 17 | 08:00 | KIAS String Seminars | Jeong-Hyuck Park | String Theory and Non-Riemannian Geometry | |

Mon | May 17 | 11:15 | Warsaw Number Theory Seminar | Marco Streng | Obtaining modular units via a recurrence relation | |

Mon | May 17 | 11:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Kengo Hirachi | Normal form for pseudohermitian structures and the singularity of the Szegö kernel | |

Mon | May 17 | 12:00 | Monday's Nonstandard Seminar | Verena Bögelein | Higher regularity in congested traffic dynamics | |

Mon | May 17 | 12:00 | Paris algebra seminar | Sachin Gautam | Poles of finite-dimensional representations of Yangians | |

Mon | May 17 | 12:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Jih-Hsin Cheng | Positive mass theorem and the CR Yamabe equation on 5-dimensional contact spin manifolds | |

Mon | May 17 | 13:00 | One World Combinatorics on Words Seminar | Jeffrey Shallit | The Walnut Tutorial: Using A Tool for Doing Combinatorics on Words | |

Mon | May 17 | 13:00 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Yongbing Zhang | Free boundary constant p-mean curvature surfaces intersecting the Pansu sphere | |

Mon | May 17 | 13:00 | IMBM Algebra Seminars | Ergün Yalçın | Higher limits over the fusion orbit category | |

Mon | May 17 | 13:00 | Monday's Nonstandard Seminar | Piotr Rybka | An example of convergence of gradient flows | |

Mon | May 17 | 13:30 | Bremen-Oldenburg Dynamics Seminar | Rhiannon Dougall | Comparison of entropy for infinite covering manifolds, and group extensions of subshifts of finite type | |

Mon | May 17 | 13:30 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Xi Zhang | The non-abelian Hodge correspondence on some non-K\"ahler manifolds | |

Mon | May 17 | 13:30 | One World Optimization seminar | Marco Antonio López Cerdá | Properties of Inequality Systems and Their Influence in Convex Optimization | |

Mon | May 17 | 13:40 | Nečas Seminar on Continuum Mechanics | Jan Stebel | Continuum-fracture models of porous media processes: derivation and analysis | |

Mon | May 17 | 14:00 | From 3-manifold invariants to number theory | Don Zagier | From 3-manifold invariants to number theory | |

Mon | May 17 | 14:00 | Extremal and probabilistic combinatorics webinar | Xizhi Liu | A unified approach to hypergraph stability | |

Mon | May 17 | 14:00 | Groups, Operators, and Banach Algebras Webinar | Alex Frei | Relative Cuntz-Pimsner algebras: a complete description of their lattice of gauge-invariant ideals | |

Mon | May 17 | 14:00 | Geometric and functional inequalities and applications | Jill Pipher | Regularity of solutions of complex coefficient systems and $p$-ellipticity | |

Mon | May 17 | 14:00 | IASM: Geometric PDE and Applications to Problems in Conformal and CR Geometry | Ruobing Zhang | On the structure of collapsing Ricci-flat Kaehler manifolds in dimension four | |

Mon | May 17 | 14:00 | IFT-Madrid Webinars | Robert Reischke | Consistent equivalence principle tests with fast radio bursts | |

Mon | May 17 | 14:00 | Quantum Groups Seminar | No talk | ------ | |

Mon | May 17 | 14:00 | UAB dynamical systems group international seminar | Anna Geyer | Stability and persistence of periodic traveling waves | |