 Doubly stochastic matrix (source code)

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= Doubly stochastic matrix
{wiki=Doubly_stochastic_matrix}

A **doubly stochastic matrix** is a special type of square matrix that has non-negative entries and each row and each column sums to 1. In other words, for a matrix \\( A \\) of size \\( n \\times n \\), the following conditions must hold: 1. \\( a_\{ij\} \\geq 0 \\) for all \\( i, j \\) (all entries are non-negative).

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