English

Associative Local Function Rings

Algebraic Geometry 2024-10-23 v1

Abstract

We prove that for an arbitrary field k,k, a complete, associative krk^r-algebra H^\hat H augmented over krk^r has exactly rr maximal two-sided ideals and deserves the name rr-pointed. If AA is any kk-algebra, M={Mi}i=1rM=\{M_i\}_{i=1}^r is a family of simple right AA-modules with a countable kk-basis, and there is a homomorphism ρA:A\enmH^(H^kr(i=1rMi))=:O^(M)\rho_A:A\rightarrow\enm_{\hat H}(H\hat{\otimes}_{k^r}(\oplus_{i=1}^r M_i))=:\hat O(M) then O^(M)\hat O(M) is rr-pointed and MM is contained in the set of right simple O^(M)\hat O(M)-modules. Our main result is that the subalgebra generated ρA(A)\rho_A(A) and all ρA(a)1\rho_A(a)^{-1} whenever ρA(a)\rho_A(a) is a unit, is a natural substitute for the localization A(M)A(M) of the kk-algebra AA in MM which only exists when the Ore condition is fulfilled.

Keywords

Cite

@article{arxiv.2410.16819,
  title  = {Associative Local Function Rings},
  author = {Arvid Siqveland},
  journal= {arXiv preprint arXiv:2410.16819},
  year   = {2024}
}