3 papers
math.AG2026
The Weil Decoration of the Horrocks-Mumford Bundle
Klaus Altmann, Andreas Hochenegger, Frederik Witt
For a normal algebraic variety we generalise the relation between reflexive rank one sheaves and Weil divisors to reflexive sheaves of arbitrary rank and so-called Weil decorations…
stat.AP2026
An Algebraic Approach to Evolutionary Accumulation Models
Jessica Renz, Frederik Witt, Iain G. Johnston
We present an algebraic approach to evolutionary accumulation modelling (EvAM). EvAM is concerned with learning and predicting the order in which evolutionary features accumulate o…
math.AG2024
Toric sheaves and polyhedra
Klaus Altmann, Andreas Hochenegger, Frederik Witt
Over a smooth projective toric variety we study toric sheaves, that is, reflexive sheaves equivariant with respect to the acting torus, from a polyhedral point of view. One applica…