Organizers

Paul Baum
Francesco D'Andrea
Ludwik Dąbrowski
Søren Eilers
Piotr Hajac
Frédéric Latrémolière
dr hab. Tomasz Maszczyk
Ryszard Nest
Marc Rieffel
Andrzej Sitarz
Wojciech Szymański
Adam Wegert

Information

Wednesdays, 5:15 p.m.

List of talks

Jan. 20, 2027, 5:15 p.m.
SARA AZZALI (Università di Bari, Italy)
TBA
Jan. 13, 2027, 5:15 p.m.
ALEXANDER GOROKHOVSKY (University of Colorado, Boulder, USA)
TBA
Dec. 16, 2026, 5:15 p.m.
GILLES G. DE CASTRO (Universidade Federal de Santa Catarina, Florianópolis, Brazil)
TBA
Dec. 9, 2026, 5:15 p.m.
KULUMANI M. RANGASWAMY (University of Colorado, Colorado Springs, USA)
TBA
Dec. 2, 2026, 5:15 p.m.
PIOTR M. HAJAC (IMPAN, Warszawa, Poland)
TBA
Nov. 25, 2026, 5:15 p.m.
MICHAEL BRANNAN (University of Waterloo, Canada)
TBA
Nov. 18, 2026, 5:15 p.m.
ANDRZEJ SITARZ (Uniwersytet Jagielloński, Kraków, Poland)
TBA
Nov. 4, 2026, 5:15 p.m.
ARKADIUSZ BOCHNIAK (Uniwersytet Jagielloński, Kraków, Poland)
TBA
Oct. 28, 2026, 5:15 p.m.
BARTOSZ K. KWAŚNIEWSKI (Uniwersytet w Białymstoku, Poland)
TBA
Oct. 21, 2026, 5:15 p.m.
ANNA WYSOCZAŃSKA-KULA (Uniwersytet Wrocławski, Poland)
TBA
Oct. 14, 2026, 5:15 p.m.
MARIUSZ TOBOLSKI (Uniwersytet Wrocławski, Poland)
TBA (TBA)
Oct. 7, 2026, 5:15 p.m.
PIOTR KOSZMIDER (IMPAN, Warszawa, Poland)
ON MASAS OF THE CALKIN ALGEBRA (ON MASAS OF THE CALKIN ALGEBRA)
Masas of the Calkin algebra have proved considerably more elusive than masas of the algebra of bounded operators on a separable Hilbert space. Classical liftable masas fall into only three isomorphism types, while nonliftable examples …
June 10, 2026, 5:15 p.m.
MASOUD KHALKHALI (Western University, London, Ontario, Canada)
NONCOMMUTATIVE GEOMETRY ON THE BERKOVICH PROJECTIVE LINE (NONCOMMUTATIVE GEOMETRY ON THE BERKOVICH PROJECTIVE LINE)
We discuss recent joint work with Damien Tageddine (J. Fractal Geom. 13, 2026) on noncommutative geometric structures associated to the Berkovich projective line. Starting from the action of p-adic Schottky groups, we construct Patterson-Sullivan measures …
June 3, 2026, 5:15 p.m.
ATUL P. GOTHE (IMPAN / Uniwersytet Warszawski, Warszawa, Poland)
A QUANTUM CW-COMPLEX STRUCTURE FOR QUANTUM REAL PROJECTIVE SPACES (A QUANTUM CW-COMPLEX STRUCTURE FOR QUANTUM REAL PROJECTIVE SPACES)
A CW-complex is a topological space which can be built up inductively by attaching n-balls along their boundary (n-1)-spheres. Quantum CW-complexes generalise the classical construction by dualising the pushouts of topological spaces to pullbacks of …
May 27, 2026, 5:15 p.m.
ANDRZEJ SITARZ (Uniwersytet Jagielloński, Kraków, Poland)
NONCOMMUTATIVE RICCI FLOW (NONCOMMUTATIVE RICCI FLOW)
The Ricci flow plays a central role in Riemannian geometry, both as a conceptual tool and as a driver of major breakthroughs. After introducing its fundamental ideas and classical applications, I will survey several existing …