English

Lifting solutions of polynomial equations on matrices over field to complete local principal ideal rings

Group Theory 2026-02-05 v1 Commutative Algebra Rings and Algebras

Abstract

Let O^\widehat{\mathscr O} be a complete local principal ideal ring with residue field kk of characteristic not 22 and fO^[x1,x2,,xm]f\in \widehat{\mathscr O}[x_1,x_2,\dots,x_m]. Take AMn(O^)A\in \mathrm M_n(\widehat{\mathscr O}) with its reduction AMn(k)\overline{A}\in \mathrm M_n(k). In this article, we study the following lifting problem. Suppose there exists a tuple (B~1,B~2,,B~m)Mn(k)m(\widetilde{B}_1, \widetilde{B}_2, \dots,\widetilde{B}_m)\in \mathrm M_n(k)^m of pairwise commuting matrices such that f(B~1,B~2,,B~m)=Af(\widetilde{B}_1, \widetilde{B}_2, \dots,\widetilde{B}_m) = \overline{A}; under what conditions can this solution be lifted to a tuple (B1,B2,,Bm)Mn(O^)m(B_1,B_2,\dots,B_m)\in \mathrm M_n(\widehat{\mathscr O})^m of pairwise commuting matrices satisfying f(B1,B2,,Bm)=Af(B_1,B_2,\dots,B_m)=A? For A\overline{A} cyclic, we show that, under suitable hypotheses analogous to those appearing in Hensel lemma, such a lifting is always possible.

Keywords

Cite

@article{arxiv.2602.04576,
  title  = {Lifting solutions of polynomial equations on matrices over field to complete local principal ideal rings},
  author = {Saikat Panja and Ayon Roy and Anupam Singh},
  journal= {arXiv preprint arXiv:2602.04576},
  year   = {2026}
}

Comments

v1, 10 pages; comments are welcome