(f)
return f.per(dmp_neg(f.num, f.lev, f.dom), f.den, cancel=False)
Negate all coefficients in ``f``.
Negate all coefficients in ``f``.
Negate all coefficients in f .
def neg(f):
        """Negate all coefficients in ``f``. """
        return f.per(dmp_neg(f.num, f.lev, f.dom), f.den, cancel=False)
def neg ( f ) : return f . per ( dmp_neg ( f . num , f . lev , f . dom ) , f . den , cancel = False )