Dorothea Bahns

In my talk I will report on recent joint work with Kasia Rejzner and Nicola Pinamonti on the massive…

June 23, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

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Dorothea Bahns

June 23, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Lachlan MacDonald

Chern-Weil theory describes a procedure for constructing the characteristic classes of a smooth manifold from geometric data (such as…

June 21, 2021

09:00

UTC

Organized by Asia-Pacific GNCG Seminar.

David Kyed

The Podleś spheres, which are q-deformed analogues of the 2-sphere, are among the most classical objects in non-commutative geometry, but…

June 16, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Valerio Proietti

The hyperbolic sets of Smale’s Axiom A systems have been defined in the topological setting by Ruelle. We will…

June 14, 2021

09:00

UTC

Organized by Asia-Pacific GNCG Seminar.

Chi-Keung Ng

The aim of this article is to give an infinite dimensional analogue of a result of Choi and Effros…

June 9, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Nigel Higson

June 9, 2021

15:15

UTC

Organized by Americas GNCG Seminar.

Nick Wright

Affine Weyl groups are a class of groups for which the group C^*-algebra can in principle be understood directly. …

June 7, 2021

09:00

UTC

Organized by Asia-Pacific GNCG Seminar.

Arkadiusz Bochniak

Models of noncommutative geometry that are beyond the usual almost-commutative framework that assumes product geometries, may lead to interesting…

June 2, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Alain Connes

This is joint work with C. Consani. When contemplating the low lying zeros of the Riemann zeta function one…

June 2, 2021

17:15

CEST

Organized by Americas GNCG Seminar.

Romain Tessera

In a joint work with Anthony Genevois, we classify up to quasi-isometry the class of lamplighter groups over one-ended finitely…

May 31, 2021

11:00

CEST

Organized by Asia-Pacific GNCG Seminar.

Raimar Wulkenhaar

Finite-dimensional approximations of noncommutative quantum field theories are matrix models. They often show rich mathematical structures: many of them…

May 26, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Steve Rosenberg

The Wodzicki residue can be used to build Chern classes and Chern-Simons classes for infinite dimensional bundles with pseudodifferential…

May 24, 2021

11:00

CEST

Organized by Asia-Pacific GNCG Seminar.

Koen van den Dungen

A well-known theorem by Connes and Skandalis provides sufficient conditions for finding the Kasparov product of two (bounded) Kasparov…

May 19, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Zhengwei Liu

Quantum Fourier Analysis is a subject that combines an algebraic Fourier transform (pictorial in the case of subfactor theory) with…

May 17, 2021

11:00

CEST

Organized by Asia-Pacific GNCG Seminar.

Nikita Sopenko

Recently methods of quantum statistical mechanics have been fruitfully applied to the study of phases of quantum lattice systems…

May 14, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Karen Strung

Noncommutative Kähler structures were recently introduced by Ó Buachalla as a framework for studying noncommutative Kähler geometry on quantum…

May 12, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Edward McDonald

I discuss how a Tauberian theorem for singular values of noncommuting operators allows us to prove Weyl asymptotic formulas…

May 10, 2021

09:00

UTC

Organized by Asia-Pacific GNCG Seminar.

Zhizhang Xie

In this talk, I will speak about my recent work on a relative index theorem for incomplete manifolds. As…

May 7, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Matthew Kennedy

Recently, Davidson and I introduced a new framework for noncommutative convexity and noncommutative function theory, along with a corresponding…

May 5, 2021

16:00

CEST

Organized by Europe GNCG Seminar.

Anna Skripka

We will discuss recent advancements in approximation of functional calculus arising in problems of mathematical physics and noncommutative geometry….

April 30, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Adam Skalski

We shall discuss a class of noncommutative probabilistic evolutions, understood as Markov semigroups acting on von Neumann algebras and…

April 28, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Shin-ichi Oguni

We show a coarse version of the Cartan-Hadamard theorem,which states that proper coarsely convex spaces are coarsely homotopyequivalent to…

April 26, 2021

11:00

CEST

Organized by Asia-Pacific GNCG Seminar.

Ieke Moerdijk

Simplicial sets form a classical and well known tool for modelling topological spaces, and more recently topologically enriched categories…

April 23, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Sanaz Pooya

The Baum-Connes conjecture, if it holds for a certain group, provides topological tools to compute the K-theory of its…

April 21, 2021

14:00

CET

Organized by Europe GNCG Seminar.

Wilhelm Winter

I will try to put into context several well-known and one or two new facts around completely positive approximations of…

April 19, 2021

09:00

UTC

Organized by Asia-Pacific GNCG Seminar.

Yang Liu

As the counterpart of conformal geometry, modular geometry on noncommutative manifolds explores the basic notions such as metric and curvature…

April 16, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Paulo Carrillo Rouse

In this talk, I will report on joint work with B.L. WANG (ANU Canberra) et H. WANG (ECNU Shanghai). Given a discrete group \(G\), I…

April 14, 2021

14:00

CEST

Organized by Europe GNCG Seminar.

Adam Rennie

I will outline efforts to describe the Kasparov product of two unbounded Kasparov modules in terms of another unbounded…

April 12, 2021

09:00

UTC

Organized by Asia-Pacific GNCG Seminar.

Jean-Eric Pin

Abstract. I will report on a result recently obtained with Christophe Reutenauer.Let p be a prime number. Mahler’s theorem…

April 9, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Francesco Fidaleo

We discuss the explicit construction of non type \(II_1\) representations and relative modular spectral triples of the noncommutative 2-torus…

April 7, 2021

14:00

CET

Organized by Europe GNCG Seminar.

Omar Mohsen

Using techniques from noncommutative geometry, I will present a very general inhomogeneous pseudo-differential calculus which allows us to obtain…

April 5, 2021

11:00

CEST

Organized by Asia-Pacific GNCG Seminar.

Henrique Bursztyn

The notion of Morita equivalence, native to ring theory, plays an important role in noncommutative geometry and has a…

April 2, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Adam Magee

Twisted real structures were introduced in 2016 as a generalisation of real structures for spectral triples which permit the…

March 31, 2021

14:00

CET

Organized by Europe GNCG Seminar.

Benoît Collins

We will report on arXiv:2103.05962, written in collaboration with Tobias Mai, Akihiro Miyagawa, Felix Parraud and Sheng Yin. Random matrix…

March 29, 2021

18:00

JST

Organized by Asia-Pacific GNCG Seminar.

Dan Voiculescu

The quasicentral modulus is a numerical invariant associated with a n-tuple of Hilbert space operators and a normed ideal of…

March 26, 2021

18:00

UTC

Organized by Americas GNCG Seminar.

Hermann Schulz-Baldes

Parings of \(K\)-theory with Fredholm modules given by Dirac operators can be computed numerically as the half-signature of a…

March 24, 2021

14:00

CET

Organized by Europe GNCG Seminar.

Stefaan Vaes

I will report on a recent joint work with Sorin Popa in which we undertake a systematic study of…

March 22, 2021

10:00

CET

Organized by Asia-Pacific GNCG Seminar.

Pere Ara

It was shown by Austin in 2013 that the question by Atiyah about the rationality of $\ell^2$-Betti numbers has…

March 19, 2021

14:00

EDT

Organized by Americas GNCG Seminar.

Catherine Meusburger

We explain how to construct a Traev-Viro style state sum model with defects, where defect planes are labelled by…

March 17, 2021

14:00

CET

Organized by Europe GNCG Seminar.

Hao Guo

I will discuss two connections between quantitative operator K-theory and scalar curvature, arising from recent work with Zhizhang Xie…

March 15, 2021

20:00

GMT+11

Organized by Asia-Pacific GNCG Seminar.

Asghar Ghorbanpour

In recent years, the investigation of geometries of noncommutative tori has attracted attention from both mathematics and physics. In…

March 12, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Paolo Piazza

The analysis of the signature operator and of the spin-Dirac operator on a \(\Gamma\)-Galois covering of a smooth compact…

March 10, 2021

14:00

CET

Organized by Europe GNCG Seminar.

Shilin Yu

The “coadjoint orbit method” philosophy of Kirillov and Kostant suggests that there is a close connection between the unitary…

March 8, 2021

17:00

GMT+8

Organized by Asia-Pacific GNCG Seminar.

Claire Debord

In this talk, after recalling basic facts on groupoids, we will see that the structure of a groupoid G…

March 5, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Kristin Courtney

In the 1990s, Blackadar and Kirchberg introduced NF algebras, which arise as limits of inductive systems where the connecting…

March 2, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Joachim Cuntz

Kasparov’s KK-theory which is based on so called Kasparov-modules can be described much more algebraically using universal extensions and classifying maps…

March 1, 2021

10:00

CET

Organized by Asia-Pacific GNCG Seminar.

Alcides Buss

In this lecture I will explain recent developments in the theory of amenability for actions of groups on C*-algebras…

February 26, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Xiang Tang

In this talk, we will report our exploration of cyclic cohomology of the Harish-Chandra Schwartz algebra of a connected…

February 23, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Eckhard Meinrenken

The idea of assigning weights to local coordinate functions appears in many areas of mathematics, such as singularity theory,…

February 19, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Sergiy Neshveyev

Given a C$^*$-algebra $A$ with an almost periodic time evolution we define a new C$^*$-algebra $A_c$ whose states parameterize…

February 16, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Henry Yuen

In low-degree testing the following question is considered: given a multivariate function over a finite field, if a sufficiently…

February 12, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Sylvie Paycha

Meromorphic germs (say at zero) in several variables with linear poles naturally arise in the context of renormalisation, which…

February 9, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Jens Hemelaer

We give an introduction to topos theory from a geometric point of view, focusing on toposes that arise from…

February 5, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Lisa Glaser

When describing a Riemannian geometry as a spectral triple, the algebra of functions on the geometry is infinite. But…

February 2, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Pierre Albin

Contact manifolds, which arise naturally in mechanics, dynamics, and geometry, carry natural Riemannian and sub-Riemannian structures and it was…

January 29, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Andreas Thom

Given a group Γ, we establish a connection between the unitarisability of its uniformly bounded representations and the asymptotic behaviour…

January 26, 2021

16:00

CET

Organized by Europe GNCG Seminar.

Emil Prodan

Starting with the pioneering works of Jean Bellissard in the 1980’s,Non-Commutative Geometry has emerged as one of sharpest tools…

January 22, 2021

14:00

EST

Organized by Americas GNCG Seminar.

Francesco D’Andrea

If a quantum space X can be obtained by “gluing” two subspaces Y and Z, there is a Mayer-Vietoris…

January 19, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Elmar Schrohe

The index theory for operator algebras generated by pseudodifferential operators and Fourier integral operators, more specifically Lie groups of…

January 12, 2021

15:00

CET

Organized by Europe GNCG Seminar.

Zhaoting Wei

December 16, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Iakovos Androulidakis

December 9, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Sheagan John

December 2, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Francesca Arici

November 17, 2020

00:00

CET

Organized by Europe GNCG Seminar.

Nigel Higson

November 11, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Ralf Meyer

November 10, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Rudy Rodsphon

November 4, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Christiaan van de Ven

November 3, 2020

15:00

CEST

Organized by Americas GNCG Seminar.

Matthew Lorentz

October 28, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Boris Tsygan

October 27, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Jonathan Block

October 21, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Henri Moscovici

October 20, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Paolo Piazza

October 14, 2020

18:00

UTC

Organized by Americas GNCG Seminar.

Nadia Larsen

October 13, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Bogdan Nica

October 7, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Nigel Higson

October 6, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Simone Cecchini

September 30, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Makoto Yamashita

September 29, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Rudolf Zeidler

September 23, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Alain Connes

September 22, 2020

15:00

CEST

Organized by Europe GNCG Seminar.

Kristin Courtney

September 16, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Anna Duwenig

September 9, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Bruno de Mendonca Braga

September 2, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Giovanni Landi

August 26, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Yi Wang

August 19, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Jonathan Belcher

August 12, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Jintao Deng

August 5, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Markus Pflaum

July 29, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Raphael Ponge

July 22, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Masoud Khalkhali

July 15, 2020

18:00

UTC

Organized by Americas GNCG Seminar.

Aurelien Sagnier

July 8, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Carla Farsi

June 24, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Shintaro Nishikawa

June 17, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Jianchao Wu

June 10, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Paolo Antonini

June 3, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Zhizhang Xie

May 27, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Rufus Willett

May 20, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Robin Deeley

May 13, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Yanli Song

May 6, 2020

18:00

UTC

Organized by Americas GNCG Seminar.

Boris Tsygan

April 29, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

Jonathan Rosenberg

April 22, 2020

19:00

UTC

Organized by Americas GNCG Seminar.

GRID View

Dorothea Bahns

Georg-August-Universität Göttingen

June 23, 2021

14:00

(CEST)

Lachlan MacDonald

University of Adelaide

June 21, 2021

09:00

(UTC)

David Kyed

Syddansk Universitet

June 16, 2021

14:00

(CEST)

Valerio Proietti

East China Normal University

June 14, 2021

09:00

(UTC)

Nigel Higson

Penn State University

June 9, 2021

15:15

(UTC)

Nick Wright

the University of Southampton

June 7, 2021

09:00

(UTC)

Arkadiusz Bochniak

Jagiellonian University, Krakow/ Indiana University Bloomington

June 2, 2021

14:00

(CEST)

Alain Connes

IHÉS/Collège de France

June 2, 2021

17:15

(CEST)

Romain Tessera

Institut de Mathématiques de Jussieu – Paris Rive Gauche

May 31, 2021

11:00

(CEST)

Raimar Wulkenhaar

Westfälische Wilhelms-Universität Münster

May 26, 2021

14:00

(CEST)

Steve Rosenberg

Boston University

May 24, 2021

11:00

(CEST)

Koen van den Dungen

Universität Bonn

May 19, 2021

14:00

(CEST)

Nikita Sopenko

Caltech

May 14, 2021

14:00

(EDT)

Karen Strung

Institute of Mathematics, Czech Academy of Sciences

May 12, 2021

14:00

(CEST)

Edward McDonald

University of New South Wales, Australia

May 10, 2021

09:00

(UTC)

Zhizhang Xie

Texas A&M University

May 7, 2021

14:00

(EDT)

Anna Skripka

University of New Mexico

April 30, 2021