MathPHP\LinearAlgebra\MatrixOperationsTest::dataProviderForDirectSum PHP Method

    public function dataProviderForDirectSum()
    {
        return [[[[1, 3, 2], [2, 3, 1]], [[1, 6], [0, 1]], [[1, 3, 2, 0, 0], [2, 3, 1, 0, 0], [0, 0, 0, 1, 6], [0, 0, 0, 0, 1]]]];
    }