On the vanishing and non rigidity of the Andr

  • Francesc Planas Vilanova
  • Published 2007


Let I be an ideal of a commutative ring A B A I Given n we characterize the vanishing of the Andr e Quillen homology modules Hp A B W for all B module W and for all p p n in terms of some canonical morphisms As a corollary we obtain a new proof of a theorem of Andr e Finally we construct an example of an ideal I of a commutative ring A such that H A B W and… (More)


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