@public
def rootof(f, x, index=None, radicals=True, expand=True):
 return CRootOf(f, x, index=index, radicals=radicals, expand=expand)

@ public def rootof ( f , x , index = None , radicals = True , expand = True ) : return CRootOf ( f , x , index = index , radicals = radicals , expand = expand )
an indexed root of a univariate polynomial .