MathPHP\LinearAlgebra\VectorOperationsTest::dataProviderForDirectProduct PHP Метод

    public function dataProviderForDirectProduct()
    {
        return [[[1], [2], [[2]]], [[1, 2], [2, 3], [[2, 3], [4, 6]]], [[1, 2, 3], [2, 3, 4], [[2, 3, 4], [4, 6, 8], [6, 9, 12]]], [[1, 2, 3, 4], [2, 3, 4, 5], [[2, 3, 4, 5], [4, 6, 8, 10], [6, 9, 12, 15], [8, 12, 16, 20]]]];
    }