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Results tagged with matrices
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user 95756
Questions where the notion matrix has an important or crucial role (for the latter, note the tag matrix-theory for potential use). Matrices appear in various parts of mathematics, and this tag is typically combined with other tags to make the general subject clear, such as an appropriate top-level tag ra.rings-and-algebras, co.combinatorics, etc. and other tags that might be applicable. There are also several more specialized tags concerning matrices.
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Extending a Theorem of Brualdi to Matrices with Infinitely Many Rows
This question is about extending a result on transportation polytopes from Brualdi regarding $m\times n$ matrices to the case when $m=\infty$. … Define $$A[K,J):=[a_{i,j}:i\in K, j\in\lbrace 1,2,\ldots,n\rbrace-J].$$
Denote by $N(R,S)$ by the class of all $m\times n$ nonnegative matrices with row sum given by the positive vector $R=(r_1,\ldots …
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