public function inverse()
{
$determinant = new Determinant($this->matrix);
$factor = $determinant->retrieve();
if ($factor === $this->valueZero) {
throw new NotInverseException();
}
$factor = 1 / $factor;
$transposed = $this->transposed();
$operations = new Operations($transposed, $this->precision);
$adjugate = $operations->adjugateMatrix();
$operations = new Operations($adjugate, $this->precision);
return $operations->multiplicationScalar($factor);
}
/**
* @return string
* @throws OperationNotAllowedException
*/
public function forOrderN()
{
if ($this->matrix->getNumRows() <= 3) {
throw new OperationNotAllowedException('determinantOrderN only allowed on 4x4 or greater matrix');
}
$this->gaussReduction();
$determinant = new Determinant($this->cofactor(1, 1));
return bcmul($this->matrix->getPoint(1, 1), $determinant->retrieve(), $this->precision);
}
public function determinant($precision = null)
{
$precision = $this->getPrecision($precision);
$determinant = new Determinant($this->matrix, $precision);
return $determinant->retrieve();
}
