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math.RA2020
Symmetry criteria for Hochschild extensions
Yang Han
We give two sufficient and necessary conditions for a Hochschild extension of a finite dimensional algebra by its dual bimodule and a Hochschild 2-cocycle to be a symmetric algebra…
math.RT2020
Hirzebruch-Riemann-Roch and Lefschetz type formulas for finite dimensional algebras
Yang Han
The Hirzebuch-Riemann-Roch (HRR) and Lefschetz type formulas for finite dimensional elementary algebras of finite global dimension are explicitly given. They have cohomological, ho…