MathPHP\LinearAlgebra\VectorAxiomsTest::dataProviderForAdditiveInverse PHP Method

    public function dataProviderForAdditiveInverse()
    {
        return [[[], []], [[2], [-2]], [[0, 1, 2, 3, 4, 5, -6, -7, 8], [0, -1, -2, -3, -4, -5, 6, 7, -8]]];
    }