3 citations · 7 across the 3 of their papers we have counts for
4 papers
A Friedlander-Suslin theorem over a noetherian base ring
Wilberd van der Kallen
Let be a noetherian commutative ring and let be a finite flat group scheme over . Let act rationally on a finitely generated commutative -algebra . We show tha…
Explorations for alternating FPU-chains with large mass
Wilberd van der Kallen, Ferdinand Verhulst
We show interaction between high- and low-frequency modes in periodic -FPU chains with alternating large masses. The treatment discusses the difficult case where the number of p…
Subset Representations and Eigenvalues of the Universal Intertwining Matrix
Dirk Siersma, Wilberd van der Kallen
We solve a combinatorial question concerning eigenvalues of the universal intertwining endomorphism of a subset representation. This is then applied to justify the evaluation of th…
How to prove this polynomial always has integer values at all integers
Wilberd van der Kallen
The following problem was posed by user "Kevin" on Mathoverflow. How to prove this polynomial always has integer values at all integers? $$P_m(x)=\sum_{i=0}^{m}\sum_{j=0}^{m} \bino…