REMINDER: IGAP SPECIAL LECTURE "The little-known Habiro ring" - Zagier - TOMORROW at 14:00

[ICTP Math Section]

_*IGAP  S P E C I A L    L E C T U R E*_

*Thursday, 18 December *2025*at 14:00 *

Venue: _Budinich__ Lecture Hall_


Speaker: Don B. Zagier (MPI, Bonn - ICTP-IGAP-SISSA, Trieste)


Title:*The little-known Habiro ring *

Abstract:  The Habiro ring originally arose in topology as the natural 
home for quantum invariants of knots and 3-manifolds, but is actually a 
purely number-theoretical object and in fact a very interesting one, 
though for some reason not yet well known to number theorists.  I will 
give the definition of this ring and explain its main properties and 
some different elementary ways of looking at it, with several examples.  
If time permits, I will also say something about its recent 
generalization to a ring associated to an arbitrary number field.  This 
latter direction arose from my work with Stavros Garoufalidis on quantum 
invariants of knots and 3-manifolds and was then developed in detail in 
a joint paper with him, Peter Scholze, and Campbell Wheeler.

To attend via Zoom, please register at

https://zoom.us/meeting/register/sP5A5OY7Tf6b9M33j615TA