# Tagged Questions

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### I want to generate(or count) all possible binary matrix that satisfy certain Condition

I want to generate(or count) all possible binary matrix that satisfy below Condition. let A be arbitrary binary matrix 4*4 ...
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### How to tell if two matrices are equal up to a permutation

Given two real rectangular matrices A, B how can I tell if they are equal up to a permutation of their rows/column without trying all possible permutations? (This is closely related to the question I ...
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### Summing the product of combinations of matrix elements

I have a situation where I have an $NxN$ matrix $A$ where each element $a_{i,j}\in\mathbb{R}_{\leq 0}$. I would like to consider the set of all collections of elements such that each collection of $N$ ...
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### A question on a matrix built with permutations of the $n$ first integers.

Let each row and each column of a $n \times n$ matrix $A$ be a permutation of $\{1, 2,...n\}$ and let $A$ be symmetric. (a) If $n$ is odd, prove that each of $1, 2,..., n$ occurs on the principle ...
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