An extremal problem for integer sparse recovery

April 18, 2019 ยท The Ethereal ยท ๐Ÿ› Linear Algebra and its Applications

๐Ÿ”ฎ THE ETHEREAL: The Ethereal
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Authors Sergei Konyagin, Benny Sudakov arXiv ID 1904.08661 Category math.CO: Combinatorics Cross-listed cs.IT, math.NA Citations 11 Venue Linear Algebra and its Applications Last Checked 2 months ago
Abstract
Motivated by the problem of integer sparse recovery we study the following question. Let $A$ be an $m \times d$ integer matrix whose entries are in absolute value at most $k$. How large can be $d=d(m,k)$ if all $m \times m$ submatrices of $A$ are non-degenerate? We obtain new upper and lower bounds on $d$ and answer a special case of the problem by Brass, Moser and Pach on covering $m$-dimensional $k \times \cdots\times k$ grid by linear subspaces.
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