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Results tagged with matrices
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user 728
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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Spectrum of primitive nonnegative integer matrices
Given such a polynomial, is there an efficient method to enumerate the valid matrices?
Some remarks.
An answer in the particular case $a_n = a_0 = 1$ will also make me happy. … A similar question, "What algebraic numbers are eigenvalues of nonnegative integer matrices?", is answered here, but I want all the roots of $P(X)$ and no other eigenvalues in the candidate matrices. …
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