2 papers
math.RT2007★ 7 cited
On the combinatorics of rigid objects in 2-Calabi-Yau categories
Raika Dehy, Bernhard Keller
Given a triangulated 2-Calabi-Yau category C and a cluster-tilting subcategory T, the index of an object X of C is a certain element of the Grothendieck group of the additive categ…
math.RT2000
Degenerations of Schubert varieties of SL(n)/B to toric varities
R. Dehy, R. Yu
Using polytopes defined in an earlier paper, we show in this paper the existence of degenerations of a large class of Schubert varieties of SL_n to toric varieties by extending the…