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arXiv · 2008.01012

The Largest Entry in the Inverse of a Vandermonde Matrix

Carlo Sanna·Jeffrey Shallit·Shun Zhang
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Abstract

We investigate the size of the largest entry (in absolute value) in the inverse of certain Vandermonde matrices. More precisely, for every real $b > 1$, let $M_b(n)$ be the maximum of the absolute values of the entries of the inverse of the $n \times n$ matrix $[b^{i j}]_{0 \leq i, j < n}$. We prove that $\lim_{n \to +\infty} M_b(n)$ exists, and we provide some formulas for it.

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Carlo Sanna, Jeffrey Shallit, Shun Zhang. 2020-08-03. The Largest Entry in the Inverse of a Vandermonde Matrix. https://arxiv.org/abs/2008.01012

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