3 papers
math.AG2019
A class of perverse schobers in Geometric Invariant Theory
Špela Špenko, Michel Van den Bergh
Perverse schobers are categorifications of perverse sheaves. We construct a perverse schober on a partial compactification of the stringy Kähler moduli space (SKMS) associated by H…
math.AG2018
On the noncommutative Bondal-Orlov conjecture for some toric varieties
Špela Špenko, Michel Van den Bergh, with an appendix by Jason P. Bell
We show that all toric noncommutative crepant resolutions (NCCRs) of affine GIT quotients of "weakly symmetric" unimodular torus representations are derived equivalent. This yields…
math.RA2010
On locally complex algebras and low-dimensional Cayley-Dickson algebras
Matej Bresar, Peter Semrl, Spela Spenko
The paper begins with short proofs of classical theorems by Frobenius and (resp.) Zorn on associative and (resp.) alternative real division algebras. These theorems characterize th…