/**
  * @dataProvider dataProviderForScalarDivide
  */
 public function testScalarDivide(array $A, $k, array $R)
 {
     $A = new Vector($A);
     $A/k = $A->scalarDivide($k);
     $R = new Vector($R);
     $this->assertEquals($R, $A/k);
     $this->assertEquals($R->getVector(), $A/k->getVector());
 }