Current Seminars
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Bowen Lecture Series -1- Symmetries of polynomial equations.
Location: UC Berkeley - Banatao Auditorium, Sutardja Dai Hall Speakers: James McKernan (University of California, San Diego)The symmetries of systems of polynomial equations can be be understood in terms of the geometry of the variety of zeroes (or solution set) of the polynomials. Roughly speaking, there are 3 kinds of geometries corresponding to positive, zero and negative curvature giving rise to 3 different kinds of symmetry groups. In this lecture, I will discuss recent advances in algebraic geometry that lead to very precise results on the structure of these symmetry groups.
Updated on Feb 11, 2019 10:18 AM PST -
BGMS Seminar: The integral Hodge conjecture for curve classes
Location: MSRI: Simons Auditorium Speakers: John Ottem (University of Oslo)The integral Hodge conjecture predicts which integral cohomology classes on a smooth complex projective variety can be represented by linear combinations of complex subvarieties. This statement is known to be false in general, as shown first by Atiyah and Hirzebruch. I'll give a short introduction to this conjecture, and present some new counterexamples. This is joint work with Olivier Benoist.
Created on Feb 14, 2019 02:33 PM PST -
Algebraic Geometry colloquium: Some smooth perfectoid spaces
Location: MSRI: Simons Auditorium Speakers: Jared Weinstein (Boston University)Updated on Feb 14, 2019 11:30 AM PST -
Student Seminar on Deformation Theory
Location: MSRI: Baker Board Room Speakers: Constantin Teleman (University of California, Berkeley)Created on Feb 19, 2019 11:43 AM PST
Upcoming Seminars
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Bowen Lecture Series -2- On the birational classification of algebraic varieties.
Location: UC Berkeley - Banatao Auditorium, Sutardja Dai Hall Speakers: Christopher Hacon (University of Utah)Algebraic varieties are geometric objects defined by polynomial equations. The minimal model program (MMP) is an ambitious program that aims to classify algebraic varieties. According to the MMP, there are 3 building blocks: Fano varieties, Calabi-Yau varieties and varieties of general type which are higher dimensional analogs of Riemann Surfaces of genus 0,1 or at least 2 respectively. In this talk I will recall the general features of the MMP and discuss recent advances in our understanding of Fano varieties and varieties of general type.
Updated on Feb 11, 2019 10:17 AM PST -
Reading Group on Hodge Theory: Abelian varieties associated to hyperkähler varieties of Kummer type and Hodge classes on abelian fourfolds (after O'Grady)
Location: MSRI: Baker Board Room Speakers: John Ottem (University of Oslo)Updated on Feb 15, 2019 04:34 PM PST -
BGMS Seminar: Moduli of surfaces in P^3
Location: MSRI: Simons Auditorium Speakers: Kristin DeVleming (University of California, San Diego)We will discuss a stable pair compactification of the moduli space of degree d surfaces in P^3. These compactifications, introduced by Koll\'ar and Shepherd-Barron arising from ideas in the Minimal Model Program, are generally difficult to describe explicitly. Motivated by work of Hacking, who obtained an explicit modular compactification for plane curves, we consider a surface S in P^3 as a pair (P^3, S). Then, using a particular enlarged class of these pairs, we can compactify the moduli space of such surfaces. Using this framework, for surfaces of odd degree d, we obtain a rough classification of the singular objects on the boundary of this moduli space and will discuss some divisorial components of the boundary. We give a more detailed description for quintic surfaces.
Updated on Feb 14, 2019 09:24 AM PST -
Bowen Lecture Series -3- Birational geometry in characteristic p>0.
Location: UC Berkeley - 60 Evans Hall Speakers: Christopher Hacon (University of Utah)After recent spectacular progress in the classification of varieties over an algebraic closed field of characteristic 0 (e.g. the solution set of a system of polynomial equations defined by p1,...,prp1,...,pr in C[x1,...,xn]C[x1,...,xn]) it is natural to try and understand the geometry of varieties defined over an algebraically closed field of characteristic p>0p>0. Many technical difficulties arise in this context. Nevertheless, there has been much progress recently. In particular, the MMP was established for 3-folds in characteristic p>5p>5 by work of Birkar, Hacon, Xu and others. In this talk, we will explain some of the challenges and the recent progress in this active area of research.
Updated on Feb 11, 2019 10:16 AM PST -
Applied Invariant Theory Seminar: Hilbert's 14th Problem & Nagata's Counter-example
Location: UC Berkeley Math (Evans Hall 891) Speakers: Emanuel Reinecke (University of Michigan), Lukas Waas (Ruprecht-Karls-Universität Heidelberg)Updated on Feb 13, 2019 12:29 PM PST -
DAG Seminar: Motivic cohomology and the derived Hecke algebra for dihedral weight one forms
Location: MSRI: Simons Auditorium Speakers: Michael Harris (Columbia University)This is a report on joint work in progress with Darmon, Rotger, and Venkatesh. In a series of papers, Venkatesh and his collaborators have proposed a conjectural framework that incorporates the action of motivic cohomology groups on the cohomology of locally symmetric spaces. The simplest case concerns the cohomology of the special fiber in characteristic p of the modular curve with coefficients in the sheaf of weight 1 forms. There the conjecture relates the action of derived Hecke operators, which only exist over coefficient rings in positive characteristic, to the (discrete) logarithms of certain units in the number fields cut out by two-dimensional complex representations of the absolute Galois group of Q. Our main result is a proof of this conjecture as it pertains to weight one forms whose associated Galois representations are induced from Dirichlet characters of quadratic fields. The proof is based on classical constructions in the theory of modular forms. If time permits, there will be a discussion of how Venkatesh's conjectures might fit into a (highly speculative) derived version of the Langlands program.
Updated on Feb 14, 2019 09:34 AM PST -
Combinatorics Seminar: Characterization of queer supercrystals
Location: UC Berkeley Math (Evans Hall 939) Speakers: Wencin Poh (University of California, Davis)We provide a characterization of the crystal bases for the quantum queer superalgebra recently introduced by Grantcharov et al.. This characterization is a combination of local queer axioms generalizing Stembridge's local axioms for crystal bases for simply-laced root systems, which were recently introduced by Assaf and Oguz, with further axioms and a new graph $G$ characterizing the relations of the type $A$ components of the queer crystal. We provide a counterexample to Assaf's and Oguz' conjecture that the local queer axioms uniquely characterize the queer supercrystal. We obtain a combinatorial description of the graph $G$ on the type $A$ components by providing explicit combinatorial rules for the odd queer operators on certain highest weight elements.
Updated on Feb 19, 2019 03:30 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Nonlinear Algebra Seminar: Voronoi Cells of Varieties & Algebraic Tools for Neural Coding and Population Genetics
Location: UC Berkeley Math (Evans Hall 891) Speakers: Michal Rosen-Zvi, Madeleine Weinstein (University of California, Berkeley)Madeleine Weinstein, UC Berkeley - 3:00pm - 4:00pm
Zvi Rosen, Florida Atlantic University - 4:00pm - 5:00pm
Created on Feb 12, 2019 03:35 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar: GL-modules, and the first fundamental theorem & Geometric Complexity Theory
Location: UC Berkeley Math (Evans Hall 891) Speakers: Rafael Oliveira (University of California, Berkeley), Mario Sanchez (University of California, Berkeley)Updated on Feb 19, 2019 03:50 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Baker Board RoomCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:00 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Baker Board RoomCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Baker Board RoomCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
DAG Seminar:
Location: MSRI: Baker Board RoomCreated on Jan 29, 2019 01:19 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
Applied Invariant Theory Seminar:
Location: UC Berkeley Math (Evans Hall 891)Created on Feb 07, 2019 09:13 AM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
Combinatorics Seminar:
Location: UC Berkeley Math (Evans Hall 939)Created on Nov 06, 2018 01:41 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 12:19 PM PST -
Prismatic Cohomology:
Location: MSRI: Baker Board RoomCreated on Feb 12, 2019 04:53 PM PST -
Women at MSRI lunch
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 03:50 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:06 PM PST -
Algebraic Geometry colloquium:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:14 PM PST -
Reading Group on Hodge Theory
Location: MSRI: Baker Board RoomCreated on Feb 13, 2019 04:32 PM PST -
BGMS Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:16 PM PST -
DAG Seminar:
Location: MSRI: Simons AuditoriumCreated on Jan 29, 2019 01:19 PM PST
Past Seminars
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Seminar DAG Seminar: Combinatorics in the ring of big Witt vectors
Updated on Feb 14, 2019 09:30 AM PST -
Seminar Women at MSRI lunch
Created on Feb 13, 2019 03:50 PM PST -
Seminar Prismatic Cohomology: Introduction to prismatic cohomology
Updated on Feb 14, 2019 09:15 AM PST -
Seminar DAG Seminar: Spaces of Algebraic Cobordism and Derived Algebraic Geometry
Updated on Feb 08, 2019 11:31 AM PST -
Seminar Applied Invariant Theory Seminar: The Hilbert-Mumford Criterion and Kempf-Ness Theorem & Scaling Algorithms and the Null Cone
Updated on Feb 07, 2019 09:19 AM PST -
Seminar BGMS Seminar: Moduli Spaces of Cubic Threefolds — Geometry and Topology
Updated on Feb 07, 2019 12:04 PM PST -
Seminar 5 minute talks
Created on Feb 08, 2019 01:43 PM PST -
Seminar Reading Seminar on Hodge Theory: Organizational meeting
Created on Feb 08, 2019 12:24 PM PST -
Seminar Algebraic Geometry colloquium: Slice theorems and existence of good moduli spaces.
Updated on Feb 08, 2019 01:20 PM PST -
Seminar 5 minute talks
Created on Feb 08, 2019 01:43 PM PST -
Seminar Commutative Algebra, Algebraic Geometry and Combinatorics: Terminal singularities that are not Cohen-Macaulay & Symmetric powers of algebraic and tropical curves
Updated on Feb 08, 2019 03:53 PM PST -
Seminar DAG Seminar: Equivariant techniques in derived algebraic geometry
Updated on Feb 08, 2019 11:30 AM PST -
Seminar BGMS Seminar: Supersingular twistor spaces
Updated on Feb 07, 2019 12:00 PM PST -
Seminar Combinatorics Seminar: Two probabilistic proofs of Moon's Theorem and the Bradley-Terry model
Updated on Feb 05, 2019 03:19 PM PST -
Seminar Applied Invariant Theory Seminar: Constructing the quotient X//G & The moduli space of cubic surfaces
Updated on Feb 07, 2019 09:17 AM PST -
Seminar Combinatorics Seminar: Varieties of signature tensors
Updated on Feb 01, 2019 09:58 AM PST -
Seminar Combinatorics Seminar: Triangulations with vanishing local h-polynomials
Updated on Jan 25, 2019 09:15 AM PST -
Seminar Lunch with Hamilton: Construction of unstable KAM tori for a system of coupled NLS equations.
Updated on Dec 05, 2018 08:59 AM PST -
Seminar Hamiltonian Colloquium: Parity-time symmetry entails pseudo-Hermiticity regardless of diagonalizability
Updated on Dec 04, 2018 12:29 PM PST -
Seminar Arnold Diffusion
Created on Dec 05, 2018 03:17 PM PST -
Seminar Tutorial on Lyapunov functions and Isolating blocks.
Created on Dec 05, 2018 03:14 PM PST -
Seminar Hamiltonian Seminar: Oscillatory orbits in the planar three body problem for all values of the masses
Updated on Nov 29, 2018 11:19 AM PST -
Seminar Graduate Student Seminar
Created on Sep 07, 2018 01:47 PM PDT -
Seminar Weak KAM Theory, Homogenization and Symplectic Topology
Created on Aug 24, 2018 03:42 PM PDT -
Seminar Celestial Mechanics: Variational construction of periodic and heteroclinic orbits in the planar Sitnikov problem
Updated on Nov 27, 2018 09:45 AM PST -
Seminar Chancellor Course: Topics in Analysis
Updated on Aug 17, 2018 03:34 PM PDT -
Seminar Lunch with Hamilton: Modeling the interaction of electromagnetic waves with beams and plasma using variational principles and Hamiltonian analysis
Updated on Nov 29, 2018 02:52 PM PST -
Seminar Weak KAM Theory, Homogenization and Symplectic Topology
Created on Aug 24, 2018 03:42 PM PDT -
Seminar Chancellor Course: Topics in Analysis
Updated on Aug 17, 2018 03:33 PM PDT -
Seminar Hamiltonian Colloquium: Dynamical zeta functions and topology for negatively curved surfaces
Updated on Nov 28, 2018 11:04 AM PST