public static TAlgebraicNumber Abs <TAlgebraicNumber>(
this IAlgebraicNumberCalculator <TAlgebraicNumber> calculator,
TAlgebraicNumber number)
{
if (calculator is null)
{
throw new ArgumentNullException(nameof(calculator));
}
return(calculator.IsStrictlyNegative(number)
? calculator.Opposite(number)
: number);
}
public Direction <TAlgebraicNumber> Opposite() => new Direction <TAlgebraicNumber>(_calculator, _calculator.Opposite(X), _calculator.Opposite(Y));