14 citations · 40 across the 14 of their papers we have counts for
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math.AG2016★ 4 cited
Difference modules and difference cohomology
Marcin Chalupnik, Piotr Kowalski
We give some basics about homological algebra of difference representations. We consider both the difference-discrete and the difference-rational case. We define the corresponding…
math.AP2016
Three solutions for elliptic Dirichlet boundary value problem with singular weight
Piotr Kowalski, Joanna Piwnik
In this paper we prove the~existence of two non-trivial weak solutions of Dirichlet boundary value problem for p-Laplacian problem with a~singular part and two disturbances satisfy…
math.LO2016★ 10 cited
Existentially closed fields with finite group actions
Daniel Max Hoffmann, Piotr Kowalski
We study algebraic and model-theoretic properties of existentially closed fields with an action of a fixed finite group. Such fields turn out to be pseudo-algebraically closed in a…