MathPHP\LinearAlgebra\VectorOperationsTest::dataProviderForSubtract PHP Method

    public function dataProviderForSubtract()
    {
        return [[[], [], []], [[3], [2], [1]], [[2, 2, 2], [1, 2, 3], [1, 0, -1]], [[2, 2, 2], [-1, -2, -3], [3, 4, 5]]];
    }