2 papers
math.RA2001
Absolutely indecomposable representations and Kac-Moody Lie algebras (with an appendix by Hiraku Nakajima)
William Crawley-Boevey, Michel Van den Bergh
A conjecture of Kac states that the polynomial counting the number of absolutely indecomposable representations of a quiver over a finite field with given dimension vector has posi…
math.RT2000
Grothendieck groups and tilting objects
I. Reiten, M. Van den Bergh
Let C be a connected noetherian hereditary abelian Ext-finite category with Serre functor over an algebraically closed field k, with finite dimensional homomorphism and extension s…