Neighborhood radius estimation for Arnold's miniversal deformations of complex and $p$-adic matrices

Abstract

V.I. Arnold (1971) constructed a simple normal form to which all complex matrices $B$ in a neighborhood $U$ of a given square matrix $A$ can be reduced by similarity transformations that smoothly depend on the entries of $B$. We calculate the radius of the neighborhood $U$. A.A. Mailybaev (1999, 2001) constructed a reducing similarity transformation in the form of Taylor series; we construct this transformation by another method. We extend Arnold's normal form to matrices over the field ${\mathbb{Q}}_p$ of $p$-adic numbers and the field $\mathbb{F}((T))$ of Laurent series over a field $\mathbb{F}$.

19 pages

References in corpus (1)

• Canonical matrices for linear matrix problems

Cited by in corpus (1)

• A constructive proof of Pokrzywa's theorem about perturbations of matrix pencils