64 citations · 346 across the 53 of their papers we have counts for
7 papers · 1 filter
The G-stable rank for tensors
Harm Derksen
We introduce the -stable rank of a higher order tensors over perfect fields. The -stable rank is related to the Hilbert-Mumford criterion for stability in Geometric Invariant…
Topological noetherianity for cubic polynomials
Harm Derksen, Rob H. Eggermont, Andrew Snowden
Let be the space of complex cubic polynomials in infinitely many variables. We show that this space is -noetherian, meaning that an…
Lower bound for ranks of invariant forms
Harm Derksen, Zach Teitler
We give a lower bound for the Waring rank and cactus rank of forms that are invariant under an action of a connected algebraic group. We use this to improve the Ranestad--Schreyer-…
Unipotent group actions on affine varieties
Harm Derksen, Arno van den Essen, David R. Finston +1
Algebraic actions of unipotent groups actions on affine varieties ( an algebraically closed field of characteristic 0) for which the algebraic quotient has sm…
A commuting derivations theorem on UFDs
Harm Derksen, Arno van den Essen, Stefan Maubach
Let be the polynomial ring over (a field of characteristic zero) in variables. The commuting derivations conjecture states that commuting locally nilpotent deriva…
On the number of subrepresentations of a general quiver representation
Harm Derksen, Aidan Schofield, Jerzy Weyman
It is well-known that the intersection multiplicities of Schubert classes in the Grassmanian are Littlewood-Richardson coefficients. We generalize this statement in the context of…