A list consisting of two
SACLIB integral polynomials , representing
the numerator and the denominator of a rational function. n and d are
considered to be relatively prime and the leading coefficient of the
denominator is supposed to be positive. We call this representation of a
rational function normalized . All
operations on rational functions are implemented in such a way that the
result is normalized again.
Basic polynomial arithmetic and calculation
of the greatest common divisor of two polynomials (for cancelling common
factors of the numerator and denominator) are used from SACLIB.