Tensors Over Banach Spaces: Completeness, Algebra and Interpolation

Abstract

Can polynomial interpolation be extended to a Banach space setting? Are tensors whose elements are non-commutative Banach space elements legitimate objects with notable analytic and algebraic properties? Here we explore these questions and present the ground work conducted to successfully interpolate a left-sided polynomial whose inputs are general Banach space elements, when the Banach space admits an associative algebra, submultiplicative norm and a multiplicative identity. We start with introductions and propose theorems and lemmas equipped for general tensors over a Banach space for those whose research interests lie outside of Lagrange interpolation, transitioning into algebraic properties inspired by Maksimov's work on cubic matrices, gradually narrowing down to the interpolation itself for left-sided polynomials in the last section of the article.