English

On the complete intersection conjecture of Murthy

Commutative Algebra 2015-10-12 v2

Abstract

Suppose A=k[X1,X2,,Xn]A=k[X_1, X_2, \ldots, X_n] is a polynomial ring over a field kk and II is an ideal in AA. Then M. P. Murthy conjectured that μ(I)=μ(I/I2)\mu(I)=\mu(I/I^2), where μ\mu denotes the minimal number of generators. Recently, Fasel \cite{F} settled this conjecture, affirmatively, when kk is an infinite perfect field, with 1/2k1/2\in k {\rm (always)}. We are able to do the same, when kk is an infinite field. In fact, we prove similar results for ideals II in a polynomial ring A=R[X]A=R[X], that contains a monic polynomial and RR is essentially finite type smooth algebra over an infinite field kk, or RR is a regular ring over a perfect field kk.

Keywords

Cite

@article{arxiv.1509.08534,
  title  = {On the complete intersection conjecture of Murthy},
  author = {Satya Mandal},
  journal= {arXiv preprint arXiv:1509.08534},
  year   = {2015}
}

Comments

We corporate an application to the Epi-Morphism conjecture of S. Abhyankar and correct few typos

R2 v1 2026-06-22T11:07:37.570Z