def from_polynomial(cls, pol):
pol = PolynomialRing(QQ, 'x')(str(pol))
pol *= pol.denominator()
R = pol.parent()
pol = R(pari(pol).polredbest().polredabs())
return cls.from_coeffs(
[int(c) for c in pol.coefficients(sparse=False)])
def pol_string_to_list(pol, deg=None, var=None):
if var is None:
from lmfdb.hilbert_modular_forms.hilbert_field import findvar
var = findvar(pol)
if not var:
var = 'a'
pol = PolynomialRing(QQ, var)(str(pol))
if deg is None:
fill = 0
else:
fill = deg - pol.degree() - 1
return [str(c) for c in pol.coefficients(sparse=False)] + ['0'] * fill
def pol_string_to_list(pol, deg=None, var=None):
if var is None:
from lmfdb.hilbert_modular_forms.hilbert_field import findvar
var = findvar(pol)
if not var:
var = 'a'
pol = PolynomialRing(QQ, var)(str(pol))
if deg is None:
fill = 0
else:
fill = deg - pol.degree() - 1
return [str(c) for c in pol.coefficients(sparse=False)] + ['0']*fill
def from_polynomial(cls, pol):
try:
# try to cast to ring
pol = PolynomialRing(QQ, 'x')(pol)
except Exception:
# try again as a string
pol = PolynomialRing(QQ, 'x')(str(pol))
pol *= pol.denominator()
R = pol.parent()
pol = R(pari(pol).polredbest().polredabs())
return cls.from_coeffs(
[int(c) for c in pol.coefficients(sparse=False)])
def from_polynomial(cls, pol):
try:
# try to cast to ring
pol = PolynomialRing(QQ, 'x')(pol)
except Exception:
# try again as a string
pol = PolynomialRing(QQ, 'x')(str(pol))
pol *= pol.denominator()
# For some reason the error raised by Pari on a constant polynomial is not being caught
if pol.degree() < 1:
raise ValueError("Polynomial cannot be constant")
R = pol.parent()
pol = R(pari(pol).polredbest().polredabs())
return cls.from_coeffs([int(c) for c in pol.coefficients(sparse=False)])
def from_polynomial(cls, pol):
pol = PolynomialRing(QQ, 'x')(str(pol))
pol *= pol.denominator()
R = pol.parent()
pol = R(pari(pol).polredbest().polredabs())
return cls.from_coeffs([int(c) for c in pol.coefficients(sparse=False)])