2 papers
math.RT2020
Infinitesimal semi-invariant pictures and co-amalgamation
Eric J. Hanson, Kiyoshi Igusa, Moses Kim +1
The purpose of this paper is to study the local structure of the semi-invariant picture of a tame hereditary algebra near the null root. Using a construction that we call co-amalga…
math.RT2018
Weighted quivers
Kiyoshi Igusa, Moses Kim
A "weight" on a quiver with values in a group is a function which assigns an element of for each arrow in . This paper shows that the essential steps in the mutation…