A survey on Han's conjecture
DOI:
https://doi.org/10.14244/lajm.v2i02.18Palavras-chave:
homologia de Hochschild, Conjectura de Han, Dimensão global, homologia de álgebras associativas, álgebras de dimensão finitaResumo
In 1989, D. Happel pointed out for a possible connection between the global dimension of a finite-dimensional algebra and its Hochschild cohomology: is it true that the vanishing of Hochschild cohomology higher groups is sufficient to deduce that the global dimension is finite? After the discovery of a counterexample, Y. Han proposed, in 2006, to reformulate this question to homology. In this survey, after introducing the concepts and results involved, I present the efforts made until now towards the comprehension of Han's conjecture; which includes: examples of algebras that have been proven to satisfy it and extensions to preserve it.
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