Elliptic Hall algebra over $\mathbb{F}_1$

Date
2017/11/17 Fri 16:30 - 18:00
Room
RIMS402号室
Speaker
Shintarou Yanagida
Affiliation
Nagoya University
Abstract

This talk is motivated by the recent work of Morton and
Samuelson which states that the Turaev skein algebra for torus is
isomorphic to a specialization of the elliptic Hall algebra. In this
talk we introduce the category $B_q$ which is an $\mathbb{F}_1$-analogue
of the category of coherent sheaves over an elliptic curve. Although our
category is not an abelian category, even nor an additive category, it
is an example of so-called belian and quasi-exact category in the sense
of Deitmar. Then we can consider the Hall algebra $U_q$ associated to
$B_{q}$ using Szczesny's construction of Hall algebra for monoid
representations. The main statement is that $U_{q}$ is isomorphic
to the Turaev skein algebra of torus. Thus our construction gives the
`B-side counter-part' of the torus skein algebra directly, not replying
on an `bi-hand' specialization process on Hall algebra.