Browsing BI Open by Journals "Journal of Algebra"

Now showing items 1-2 of 2

    • The algebra of observables in noncommutative deformation theory 

      Eriksen, Eivind; Siqveland, Arvid (Journal article; Peer reviewed, 2019)
      We consider the algebra O(M) of observables and the (formally) versal morphism η : A → O(M) defined by the noncommutative deformation functor DefM of a family M = {M1, . . . , Mr} of right modules over an associative ...

    • Deformation theory of Cohen-Macaulay approximation 

      Ile, Runar (Journal article; Peer reviewed, 2021)
      In [22] we established axiomatic parametrised Cohen-Macaulay approximation which in particular was applied to pairs consisting of a finite type flat family of Cohen-Macaulay rings and modules. In this sequel we study the ...