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math.KT2025
Comparison of Cohomological and K-theoretical Hall algebra
Felix Küng, Špela Špenko
We give a more conceptual construction of a comparison algebra morphism from the K-theoretical Hall algebra to a twist of the cohomological Hall algebra associated to a symmetric q…
math.KT2024
Homotopy Invariants for gradable finite dimensional algebras
Sira Gratz, Theo Raedschelders, Å pela Å penko +1
We show that for a gradable finite dimensional algebra the perfect complexes and bounded derived category cannot be distinguished by homotopy invariants.