Fri | May 24 | 21:30 | Daniel Halpern-Leistner | Infinite dimensional geometric invariant theory and gauged Gromov-Witten theory | |

Fri | May 24 | 19:30 | Hannah Larson | The Chow ring of the universal Picard stack over the hyperelliptic locus | |

Thu | May 23 | 23:30 | Hannah Larson | Yormark Distinguished Lecture: Cohomology of moduli spaces of curves | |

Fri | May 03 | 21:30 | Matt Kerr | Hypergeometric families and Beilinson’s conjectures (main talk) | |

Fri | May 03 | 19:00 | Matt Kerr | Hypergeometric families and Beilinson’s conjectures (pre-talk) | |

Fri | Apr 19 | 21:30 | Mura Yakerson | Motivic Adams conjecture | |

Fri | Apr 19 | 19:00 | Jakub Witaszek | Singularities in mixed characteristic via the Riemann-Hilbert correspondence | |

Fri | Apr 12 | 19:00 | Weite Pi | Cohomology rings of the moduli of one-dimensional sheaves on the projective plane | |

Fri | Apr 05 | 19:00 | Matt Baker | Representations of rigid matroids | |

Fri | Mar 15 | 21:30 | Hunter Spink | A new divided difference, with applications to Schubert polynomials | |

Fri | Mar 15 | 19:00 | Rosie Shen | Du Bois singularities, rational singularities, and beyond | |

Tue | Mar 12 | 20:00 | Dhruv Goel | Chow Classes of Varieties of Secant and Tangent Lines | |

Mon | Mar 11 | 22:45 | Nathan Chen | An overview of measures of irrationality | |

Fri | Feb 23 | 20:00 | Farbod Shokrieh | Heights, abelian varieties, and tropical geometry | |

Fri | Jan 26 | 20:00 | Junliang Shen | Geometry of the P=W conjecture and beyond | |

Fri | Jan 19 | 20:00 | Ziquan Zhuang | Stability of klt singularities | |

Fri | Dec 08 | 19:30 | Angela Gibney | Vertex operator algebras and moduli spaces | |

Fri | Dec 01 | 19:30 | Matt Satriano | Beyond twisted maps: crepant resolutions of log terminal singularities and a motivic McKay correspondence | |

Fri | Nov 17 | 19:30 | Renzo Cavalieri | A log/tropical take on Hurwitz numbers | |

Fri | Nov 10 | 19:30 | Federico Scavia | Massey products in Galois cohomology | |

Fri | Oct 27 | 18:30 | Izzet Coskun | The cohomology of a general stable sheaf on a K3 surface | |

Fri | Oct 20 | 21:00 | Louis Esser | Symmetries of Fano varieties | |

Fri | Oct 20 | 18:30 | Sung Gi Park | Kodaira dimension and hyperbolicity for smooth families of varieties | |

Fri | Oct 13 | 19:00 | Eugene Gorsky | Braid varieties | |

Thu | Oct 05 | 23:30 | Michael Temkin | Distinguished Lecture: Filling a few holes in the classical resolution of singularities | |

Mon | Oct 02 | 21:30 | Michael Temkin | Wild ramification and geometry of valuations (joint algebraic geometry and number theory seminar) | |

Fri | Jun 09 | 19:00 | Ben Church | Frames of 1-forms on varieties and maps to abelian varieties | |

Fri | Jun 02 | 19:00 | Melody Chan | The weight 0 compactly supported Euler characteristic of moduli spaces of marked hyperelliptic curves | |

Fri | May 19 | 19:00 | Ming Hao Quek | Around the motivic monodromy conjecture for non-degenerate hypersurfaces | |

Fri | May 05 | 19:00 | Hannah Larson | The embedding theorem in Hurwitz--Brill--Noether theory | |

Fri | Apr 28 | 19:00 | Helene Esnault | Crystallinity properties of complex rigid local systems [not online] | |

Fri | Apr 21 | 19:00 | Eric Larson | Interpolation for Brill--Noether Curves | |

Fri | Apr 14 | 19:00 | Isabel Vogt | Curve classes on conic bundles threefolds and applications to rationality | |

Fri | Mar 10 | 22:00 | Nathan Chen | Fano hypersurfaces and differential forms via positive characteristic | |

Fri | Mar 10 | 20:00 | Shiji Lyu | Behavior of some invariants in characteristic $p$ | |

Fri | Feb 24 | 20:00 | Patricio Gallardo Candela | A perspective on explicit compactifications of the moduli space of surfaces and pairs | |

Fri | Feb 17 | 20:00 | Chih-Wei Chang | The Iitaka dimensions of toric vector bundles | |

Fri | Feb 10 | 20:00 | Aaron Landesman | Splitting types of finite monodromy vector bundles | |

Fri | Feb 03 | 20:00 | Hernan Iriarte | Weak continuity on the variation of Newton Okounkov bodies | |

Fri | Jan 27 | 20:00 | Dusty Ross | Putting the “volume” back in “volume polynomials” | |

Fri | Jan 20 | 21:45 | Allen Knutson | Generic pipe dreams and the commuting scheme | |

Fri | Jan 20 | 20:00 | Will Sawin | Quantitative $\ell$-adic sheaf theory | |

Fri | Dec 02 | 20:00 | Chengxi Wang | Calabi-Yau varieties of large index | |

Fri | Nov 18 | 20:00 | Pierrick Bousseau | Fock–Goncharov Dual Cluster Varieties and Gross–Siebert Mirrors | |

Fri | Nov 11 | 20:00 | Jacob Tsimerman | Abelian Varieties not Isogenous to Jacobians | |

Fri | Oct 28 | 19:00 | Matthew Emerton | Stacks in the arithmetic Langlands program | |

Fri | Oct 21 | 19:00 | Matt Larson | The local motivic monodromy conjecture for simplicial nondegenerate singularities | |

Fri | Sep 16 | 19:00 | Adeel Khan | An invitation to motivic sheaves (part 2) | |

Fri | Sep 09 | 19:00 | Adeel Khan | An invitation to motivic sheaves (part 1) | |

Fri | Sep 02 | 19:00 | Hunter Spink | Examples of o-minimality in algebraic geometry | |

Fri | May 27 | 19:00 | Soheyla Feyzbakhsh | Hyperkahler varieties as Brill-Noether loci on curves | |

Fri | May 20 | 19:00 | Tony Feng | Enumerative arithmetic geometry and automorphic forms | |

Fri | May 13 | 19:00 | Daniele Agostini | Singular curves, degenerate theta functions and KP solutions | |

Fri | May 06 | 19:00 | Daniil Rudenko | Rational Elliptic Surfaces and Trigonometry of Non-Euclidean Tetrahedra | |

Fri | Apr 29 | 19:00 | David Anderson | The direct sum morphism in (equivariant) Schubert calculus | |

Fri | Apr 15 | 19:00 | Kiran Kedlaya | Angle ranks of abelian varieties | |

Fri | Apr 08 | 19:00 | Michail Savvas | Reduction of stabilizers and generalized Donaldson-Thomas invariants | |

Fri | Apr 01 | 19:00 | Siddarth Kannan | Moduli of relative stable maps to $\mathbf{P}^1$: cut-and-paste invariants | |

Fri | Mar 25 | 19:00 | Hunter Spink | A new Chern character for "classical Lie type" combinatorics | |

Fri | Mar 18 | 19:00 | Tony Yue Yu | Non-archimedean Quantum K-theory and Gromov-Witten invariants | |

Fri | Mar 11 | 20:00 | Omid Amini | Geometry of hybrid curves and their moduli spaces, with a view toward applications | |

Fri | Mar 04 | 20:00 | Ana Balibanu | Regular centralizers and the wonderful compactification | |

Fri | Feb 25 | 20:00 | Yi Hu | Resolution of Singularities in Arbitrary Characteristics | |

Fri | Feb 18 | 20:00 | Enrica Mazzon | Higher Fano manifolds | |

Fri | Feb 04 | 20:00 | Madeline Brandt | Top Weight Cohomology of $A_g$ | |

Fri | Jan 28 | 20:00 | Allen Knutson | Resolutions of Richardson varieties, stable curves, and dual simplicial spheres | |

Fri | Jan 21 | 20:00 | Chelsea Walton | Representation theory of elliptic algebras | |

Fri | Jan 14 | 20:00 | Emily Clader | Permutohedral complexes and rational curves with cyclic action | |

Fri | Dec 17 | 20:00 | Ziquan Zhuang | Properness of the K-moduli space | |

Fri | Dec 10 | 20:00 | Noah Olander | Semiorthogonal decompositions and dimension | |

Fri | Dec 03 | 20:00 | Louis Esser | Varieties of general type with doubly exponential asymptotics | |

Fri | Nov 19 | 20:00 | Renzo Cavalieri | The integral Chow ring of $M_{0}(\mathbb{P}^r,d)$ | |

Fri | Nov 12 | 20:00 | Kai Behrend | Donaldson-Thomas theory of the quantum Fermat quintic | |

Fri | Nov 05 | 19:00 | Mohammed Abouzaid | What can symplectic topology tell us about algebraic varieties? | |

Fri | Oct 15 | 19:00 | Maddie Weinstein | Algebraic Geometry of Curvature and Matrices with Partitioned Eigenvalues | |

Fri | Oct 08 | 19:00 | Joaquín Moraga | Toroidalization principles for klt singularities | |

Fri | Oct 01 | 19:00 | Arnav Tripathy | Line bundles in equivariant elliptic cohomology | |

Fri | Sep 24 | 19:00 | Ming Hao Quek | Logarithmic resolution of singularities via multi-weighted blow-ups | |

Fri | Sep 17 | 19:00 | Han-Bom Moon | Derived category of moduli of vector bundles | |

Fri | Sep 10 | 19:00 | Maria Yakerson | Twisted K-theory in motivic homotopy theory | |

Fri | Aug 13 | 19:00 | Elden Elmanto | The completely decomposed arc topology and motivic applications | |

Fri | Aug 06 | 19:00 | Ritvik Ramkumar | On the tangent space to the Hilbert scheme of points in $\mathbf{P}^3$ | |

Fri | Jul 30 | 19:00 | Federico Scavia | The Grothendieck ring of stacks | |

Fri | Jul 23 | 19:00 | Tom Graber | Virtual localization for relative obstruction theories and stable log maps | |

Fri | Jul 16 | 19:00 | Raymond Cheng | $q$-bic Hypersurfaces | |

Fri | Jul 09 | 19:00 | Denis Nardin | Quadratic forms on rings and the homotopy limit problem | |

Fri | Jun 11 | 19:00 | Lena Ji | The Noether–Lefschetz theorem | |

Fri | Jun 04 | 19:00 | Martin Ulirsch | Tropical geometry and logarithmic compactifications of reductive algebraic groups | |

Fri | May 28 | 19:00 | Dhruv Ranganathan | Constructing logarithmic moduli | |

Fri | May 21 | 19:00 | Eric Katz | Iterated p-adic integration on semistable curves | |

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

Fri | May 07 | 19:00 | Geoff Smith | Normal bundles of rational curves and separably rationally connected varieties | |

Fri | Apr 30 | 19:00 | Remy van Dobben de Bruyn | Constructing varieties with prescribed Hodge numbers modulo m in positive characteristic | |

Fri | Apr 23 | 19:00 | Michael Temkin | Logarithmic resolution of singularities | |

Fri | Apr 16 | 19:00 | Samir Canning | The Chow rings of $M_7$, $M_8$, and $M_9$ | |

Fri | Apr 09 | 19:00 | Sam Molcho | The strict transform in logarithmic geometry | |

Fri | Apr 02 | 19:00 | Matt Baker | Pastures, Polynomials, and Matroids | |

Fri | Mar 26 | 19:00 | Nikolas Kuhn | A blowup formula for virtual Donaldson invariants | |

Sat | Mar 13 | 00:00 | Yuuji Tanaka | On the virtual Euler characteristics of the moduli spaces of semistable sheaves on a complex projective surface | |

Fri | Mar 05 | 20:00 | Arend Bayer | Fano varieties: from derived categories to geometry via stability | |

Fri | Feb 26 | 20:00 | Jihao Liu | Complements and local singularities in birational geometry | |

Fri | Feb 19 | 20:00 | Izzet Coskun | Algebraic Hyperbolicity and Lang-type loci in hypersurfaces | |

Fri | Feb 12 | 20:00 | Laure Flapan | Fano manifolds associated to hyperkähler manifolds | |

Fri | Feb 05 | 20:00 | Sean Keel | Berkovich geometry and mirror symmetry | |

Fri | Jan 29 | 20:00 | Soumya Sankar | Derived equivalences of gerbey curves | |

Fri | Jan 22 | 20:00 | Takumi Murayama | Grothendieck's localization problem | |

Fri | Jan 15 | 20:00 | Ben Antieau | Genus 1 curves in twisted projective spaces | |

Fri | Dec 04 | 20:00 | Rahul Pandharipande | The top Chern class of the Hodge bundle and the log Chow ring of the moduli space of curves | |

Fri | Nov 13 | 20:00 | Taylor Dupuy | Abelian Varieties Over Finite Fields in the LMFDB | |

Fri | Nov 06 | 20:00 | Akhil Mathew | \'Etale K-theory and motivic cohomology | |

Fri | Oct 30 | 19:00 | Aaron Landesman | The Torelli map restricted to the hyperelliptic locus | |

Fri | Oct 23 | 19:00 | Jarod Alper | Coherent completeness and the local structure of algebraic stacks | |

Fri | Oct 16 | 19:00 | Barbara Fantechi | Infinitesimal deformations of semi-smooth varieties | |

Fri | Oct 09 | 19:00 | Karen Smith | Extremal Singularities in Prime Characteristic | |

Fri | Oct 02 | 19:00 | Juliette Bruce | The top weight cohomology of $A_g$ | |

Fri | Sep 25 | 19:00 | Richard Thomas | Square root Euler classes and counting sheaves on Calabi-Yau 4-folds | |

Fri | Sep 18 | 19:00 | Rachel Webb | Virtual cycle on the moduli space of maps to a complete intersection | |

Fri | Sep 11 | 19:00 | Andrew Kobin | Zeta functions and decomposition spaces | |

Fri | Sep 04 | 19:00 | Chris Eur | Simplicial generation of Chow rings of matroids | |

Fri | Aug 28 | 19:00 | Martin Olsson | Determinants and deformation theory of perfect complexes | |

Fri | Aug 21 | 19:00 | Hannah Larson | Brill--Noether theory over the Hurwitz space | |

Fri | Jul 31 | 19:30 | Dan Abramovich | Resolution and logarithmic resolution via weighted blowings up | |

Fri | Jul 24 | 19:00 | Brendan Hassett | Symbols, birational geometry, and computations | |

Fri | Jul 17 | 19:00 | Laura Escobar | Wall-crossing phenomena for Newton-Okounkov bodies | |

Fri | Jul 10 | 19:00 | John Christian Ottem | On (2,3)-fourfolds | |

Fri | Jun 12 | 19:00 | Wei Ho | Splitting Brauer classes | |

Fri | Jun 12 | 17:45 | Margaret Bilu | Arithmetic and motivic statistics via zeta functions | |

Fri | Jun 05 | 19:00 | Bhargav Bhatt | A p-adic Riemann-Hilbert functor and vanishing theorems | |

Fri | May 29 | 17:45 | Yuchen Liu | Moduli spaces of quartic hyperelliptic K3 surfaces via K-stability | |

Fri | May 22 | 18:00 | Chenyang Xu | K-moduli of Fano varieties | |

Fri | May 15 | 19:00 | Rob Silversmith | Studying subschemes of affine/projective space via matroids | |

Fri | May 15 | 17:45 | Rohini Ramadas | The locus of post-critically finite maps in the moduli space of self-maps of $\mathbb{P}^n$ | |

Fri | May 08 | 19:00 | Bjorn Poonen | Bertini irreducibility theorems via statistics | |

Fri | May 08 | 17:45 | Julie Desjardins | Density of rational points on a family of del Pezzo surface of degree 1 | |

Fri | May 01 | 19:00 | Burt Totaro | The Hilbert scheme of infinite affine space | |

Fri | May 01 | 17:45 | Borys Kadets | 38406501359372282063949 & all that: Monodromy of Fano problems | |

Fri | Apr 24 | 18:00 | Kirsten Wickelgren | There are $160,839 \langle 1 \rangle + 160,650 \langle -1\rangle$ 3-planes in a 7-dimensional cubic hypersurface | |

Fri | Apr 17 | 18:00 | Gavril Farkas | Green’s conjecture via Koszul modules | |