Quadratic forms, linear algebraic groups and beyond

algebraic geometry group theory K-theory and homology rings and algebras representation theory

Audience:	Researchers in the discipline
Seminar series time:	Wednesday 15:30-16:30 in your time zone, UTC
Organizers:	Philippe Gille, Zinovy Reichstein*, Kirill Zaynullin
	*contact for this listing

Please identify yourself by name on zoom, so that we know who is attending. For a detailed schedule, visit the seminar page at mysite.science.uottawa.ca/kzaynull/QFLAG/index.html

The seminar meets on Wednesdays.

Upcoming talks

Past talks

Your time			Speaker	Title
Wed	Dec 07	16:30	Federico Scavia	Degenerate fourfold Massey products over arbitrary fields
Wed	Nov 23	16:30	Stephen Scully	On the dimensions of quadratic forms isotropic over the function field of a quadric
Wed	Nov 16	16:30	Barry Demba	Degree 3 relative invariant for unitary involutions
Wed	Nov 09	16:30	Maxim Zhykhovich	The J-invariant of algebras with orthogonal involution.
Wed	Oct 19	15:30	Yashonidhi Pandey	On Bruhat-Tits theory over a higher dimensional base
Wed	Oct 12	15:30	Benjamin Martin	Geometric invariant theory for reductive groups over non-algebraically closed fields
Wed	Sep 28	15:30	Karim Johannes Becher	Fields with bounded Brauer 2-torsion index
Wed	Jul 13	15:30	Goncalo Tabuada	TBA
Wed	Jul 06	15:30	Danny Ofek	TBA
Wed	Jun 29	15:30	Ido Efrat	Steinberg Relations for Massey Products
Wed	Jun 22	15:30	Max Lieblich	Murphy's Law for gerbes
Wed	Jun 15	15:30	Benjamin Antieau	The K-theory of Z/p^n
Wed	Jun 08	15:30	Eliahu Matzri	On the symbol length of symbols in Galois cohomology.
Wed	Jun 01	15:30	Aravind Asok	On P^1-stabilization in unstable motivic homotopy theory
Wed	May 25	15:30	Fatma Kader Bingöl	On the 4-torsion part of the Brauer group
Wed	May 18	15:30	Benjamin Antieau	Benjamin Antieu's talk is postponed to June 15
Wed	Apr 06	15:30	Holger Petersson	Integral octonions: history and perspectives
Wed	Mar 30	15:30	Claudio Quadrelli	The Bogomolov-Positselski conjecture for maximal pro-p Galois groups
Wed	Mar 23	15:30	Nicole Lemire	Codimension 2 cycles of classifying spaces of low-dimensional algebraic tori
Wed	Mar 16	15:30	Maneesh Thakur	The cyclicity problem for Albert division algebras
Wed	Mar 09	16:30	Fabio Tanania	On the motivic cohomology of the Nisnevich classifying space of PGL_n
Wed	Mar 02	16:30	Susanne Pumpluen	Nonassociative algebras obtained from skew polynomials and their applications
Wed	Feb 23	16:30	Mathieu Florence	Equivariant Witt vector bundles
Wed	Feb 16	16:30	Alexandra Utiralova	Harish-Chandra bimodules in complex rank
Wed	Feb 09	16:30	Roman Fedorov	On the purity conjecture of Nisnevich for torsors under reductive group schemes
Wed	Feb 02	16:30	Alexander S. Sivatski	Nonstandard quadratic forms over rational function fields
Wed	Jan 26	16:30	Alberto Elduque	Gradings on simple Lie algebras
Wed	Jan 19	16:30	Asher Auel	Brauer classes split by genus one curves
Wed	Dec 15	16:30	Olivier Wittenberg	Massey products in the Galois cohomology of number fields
Wed	Dec 08	16:30	Michael Bate	Overgroups of regular unipotent elements in algebraic groups
Wed	Dec 01	16:30	Erhard Neher	Quadratic forms over semilocal rings
Wed	Nov 24	16:30	Joshua Ruiter	Abstract homomorphisms of some special unitary groups
Wed	Nov 17	16:30	Alena Pirutka	Quadrics and computation of the unramified Brauer group
Wed	Nov 10	16:30	Maria Yakerson	Twisted K-theory in motivic homotopy theory
Wed	Oct 27	15:30	Jean-Louis Colliot-Thelene	Quadratic forms and stable rationality II
Wed	Oct 20	15:30	Jean-Louis Colliot-Thelene	Quadratic forms and stable rationality I
Wed	Oct 13	15:30	Eva Bayer-Fluckiger	Isometries of lattices and automorphisms of K3 surfaces
Wed	Oct 06	15:30	Simon Pepin Lehalleur	Quadratic enumerative geometry and the Deligne-Milnor formula
Wed	Sep 29	15:30	Hanspeter Kraft	Small $G$-varieties (joint work with Andriy Regeta and Susanna Zimmermann)
Wed	Sep 22	15:30	Nikita Karpenko	Yagita’s counter-examples and beyond
Wed	Jul 21	15:30	David Saltman	Lifting in Mixed Characteristics
Wed	Jul 14	15:30	Seidon Alsaody	TBA
Wed	Jul 07	15:30	Stefan Schreieder	Refined unramified cohomology of schemes
Wed	Jun 23	15:30	Anand Sawant	Near-rationality properties of norm varieties
Wed	Jun 16	15:30	Ning Guo	The Grothendieck–Serre conjecture over valuation rings
Wed	Jun 09	15:30	Zev Rosengarten	Rigidity and Unirational groups
Wed	Jun 02	15:30	Jan Minac and Tung T. Nguyen	A panoramic view of absolute Galois groups
Wed	May 26	15:30	Alexander Vishik	Torsion Motives
Wed	May 19	15:30	Susanna Zimmermann	Algebraic groups acting birationally on surfaces over a perfect field
Wed	May 12	15:30	Robert Guralnick	Generic Stabilizers for Simple Algebraic Groups
Wed	May 05	15:30	Suresh Venapally	Degree three cohomology groups of function fields of curves over number fields
Wed	Apr 14	15:30	Olivier Haution	The cobordism ring of algebraic involutions
Wed	Apr 07	15:30	Kelly McKinnie	Common Splitting Fields of Symbol Algebras
Wed	Mar 31	15:30	Andrei Lavrenov	Morava motives of projective quadrics
Wed	Mar 24	15:30	Michel Brion	Homomorphisms of algebraic groups: representability and rigidity
Wed	Mar 17	15:30	Matthieu Romagny	Smooth affine group schemes over the dual numbers
Wed	Mar 10	16:30	Vladimir Popov	Root systems and root lattices in number fields
Wed	Mar 03	16:30	Olivier Benoist	Sums of squares in local fields
Wed	Feb 24	16:30	Julia Hartmann	Local-global principles for constant reductive groups over arithmetic function fields
Wed	Feb 17	16:30	Ivan Panin	Rationally isotropic quadratic spaces are locally isotropic (mixed characteristic case)
Wed	Feb 10	16:30	Patrick Brosnan	Fixed Points in Toroidal Compactifications and Essential Dimension of Covers
Wed	Feb 03	16:30	Giancarlo Lucchini-Arteche	Local-global principles for homogeneous spaces over some two-dimensional geometric global fields
Wed	Jan 27	16:30	Alexander Kuznetsov	Exceptional collection of vector bundles on F4/P4
Wed	Jan 20	16:30	Uriya First	The Grothendieck--Serre conjecture for classical groups in low dimensions
Mon	Dec 14	16:00	Eric Primosic	Motivic cohomology and infinitesimal group schemes
Mon	Dec 07	16:00	Pavel Sechin	Morava K-theory pure motives with applications to quadrics
Mon	Nov 30	16:00	Alex Wertheim	Degree One Milnor K-Invariants of Groups of Multiplicative Type
Mon	Nov 23	16:00	Victor Petrov	Isotropy of Tits construction
Mon	Nov 16	16:00	Kęstutis Česnavičius	Grothendieck–Serre in the split unramified case
Mon	Nov 09	16:00	Lucy Moser-Jauslin	Forms of almost homogeneous varieties
Mon	Nov 02	16:00	Anastasia Stavrova	Torsors of isotropic reductive groups over Laurent polynomials
Mon	Oct 26	15:00	Cameron Ruether	Injections from Kronecker Products and the Cohomological Invariants of Half-Spin
Mon	Oct 19	15:00	Cyril Demarche	Splitting families in Galois cohomology
Mon	Oct 12	15:00	Alexander Merkurjev	Operations in connective K-theory
Mon	Oct 05	15:00	Igor Rapinchuk	Algebraic groups with good reduction
Mon	Sep 28	15:00	Alexandre Lourdeaux	Brauer invariants of linear algebraic groups
Mon	Sep 21	15:00	Mikhail Borovoi	Galois cohomology of real reductive groups
Mon	Sep 14	15:00	Raman Parimala	A Hasse principle for simply connected groups
Fri	Jul 10	15:00	Benedict Williams	Algebras requiring many generators
Fri	Jul 03	15:00	Maurice Chayet	E8 and a new class of commutative non-associative algebras with a continuous Pierce Spectrum
Fri	Jun 26	15:00	Burt Totaro	Cohomological invariants in positive characteristic
Fri	Jun 19	15:00	Maike Gruchot	Variations of G-complete reducibility
Fri	Jun 12	15:00	Roberto Pirisi	Brauer groups of moduli of hyperelliptic curves, via cohomological invariants
Fri	Jun 05	15:00	Danny Krashen	Field patching, local-global principles and rationality
Fri	May 29	15:00	Federico Scavia	Codimension two cycles on classifying stacks of algebraic tori
Fri	May 22	15:00	Alexander Duncan	Cohomological invariants and separable algebras
Fri	May 15	15:00	David Stewart	Irreducible modules for pseudo-reductive groups

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