5 citations · 9 across the 4 of their papers we have counts for
Showing math.ACShow all
3 papers · 1 filter
math.AC2004
Subdivisions of toric complexes
Morten Brun, Tim Roemer
We introduce toric complexes as polyhedral complexes consisting of rational cones together with a set of integral generators for each cone, and we define their associated face ring…
math.AC2003★ 2 cited
Witt vectors and Tambara functors
Morten Brun
We give, for every finite group G, a combinatorial description of the ring of G-Witt vectors on a polynomial algebra over the integers. Using this description we show that the func…
math.AC2003★ 2 cited
Betti numbers of Z^n-graded modules
Morten Brun, Tim Roemer
Let S=K[X_1,...,X_n] be the polynomial ring over a field K. For bounded below Z^n-graded S-modules M and N we show that if Tor^S_p(M,N) is nonzero, then for every i between 0 and p…