Homological aspects of derivation modules and critical case of the Herzog–Vasconcelos conjecture

Victor H. Jorge-Pérez ^[1] ; Cleto B. Miranda-Neto ^[2]
1. [1] Universidade de São Paulo
  
  Universidade de São Paulo
  
  Brasil
2. [2] Universidade Federal da Paraíba
  
  Universidade Federal da Paraíba
  
  Brasil
Localización: Collectanea mathematica, ISSN 0010-0757, Vol. 73, Fasc. 2, 2022, págs. 203-219
Idioma: inglés
DOI: 10.1007/s13348-021-00314-9
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Resumen
- Let R be a Noetherian local k-algebra whose derivation module Derk(R) is finitely generated. Our main goal in this paper is to investigate the impact of assuming that Derk(R) has finite projective dimension (or finite Gorenstein dimension), mainly in connection with freeness, under a suitable hypothesis concerning the vanishing of (co)homology or the depth of a certain tensor product. We then apply some of our results towards the critical case depthR=3 of the Herzog–Vasconcelos conjecture and consequently to the strong version of the Zariski–Lipman conjecture.