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Results tagged with nt.number-theory
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user 500300
Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions
3
votes
Number of matrices with unit determinant and fixed sum of elements
$a_n$ is odd if and only if $n>1$ is a power of a prime $\equiv3\pmod4$. To see this, note that adding the constraints $M=M^T$ and $WMW=M$ for $W=\left(\begin{smallmatrix}&&1\\&1&\\1&&\end{smallmatrix …
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