2 papers
math.RA2024
Multiplicative Automorphisms of Incidence Algebras
Evgenii Kaigorodov, Piotr Krylov, Askar Tuganbaev
Let be the incidence algebra of the preordered set over the ring . In the case of a finite connected partially ordered set , we prove that the subgroup of inner…
math.RA2023
Incidence Coalgebras: Automorphisms and Derivations
Piotr Krylov, Askar Tuganbaev
We describe automorphisms and derivations of the incidence coalgebra of the partially ordered set over a field . In this case, the fact is significantly use…