public static bool IsSmallerThan <TAlgebraicNumber>(
this IAlgebraicNumberCalculator <TAlgebraicNumber> calculator,
TAlgebraicNumber number1,
TAlgebraicNumber number2)
{
if (calculator is null)
{
throw new ArgumentNullException(nameof(calculator));
}
return(calculator.IsPositive(calculator.Subtract(number2, number1)));
}