3 citations · 4 across the 5 of their papers we have counts for
4 papers · 1 filter
Lefschetz extensions, tight closure, and big Cohen-Macaulay algebras
Matthias Aschenbrenner, Hans Schoutens
We associate to every equicharacteristic zero Noetherian local ring a faithfully flat ring extension which is an ultraproduct of rings of various prime characteristics, in a we…
The asymptotic behavior of solid closure in mixed characteristic
Hans Schoutens
We study how solid closure in mixed characteristic behaves after taking ultraproducts. The ultraproduct will be chosen so that we land in equal characteristic, and therefore can ma…
Mixed characteristic homological theorems in low degrees
Hans Schoutens
Let R be a locally finitely generated algebra over a discrete valuation ring V of mixed characteristic. For any of the homological properties, the Direct Summand Theorem, the Monom…
Canonical Big Cohen-Macaulay algebras and rational singularities
Hans Schoutens
We give a canonical construction of a balanced big Cohen-Macaulay algebra for a domain of finite type over by taking ultraproducts of absolute integral closures in posi…