def test_sfield():
x = symbols("x")
F = FracField((E, exp(exp(x)), exp(x)), ZZ, lex)
e, exex, ex = F.gens
assert sfield(exp(x)*exp(exp(x) + 1 + log(exp(x) + 3)/2)**2/(exp(x) + 3)) \
== (F, e**2*exex**2*ex)
F = FracField((x, exp(1/x), log(x), x**QQ(1, 3)), ZZ, lex)
_, ex, lg, x3 = F.gens
assert sfield(((x-3)*log(x)+4*x**2)*exp(1/x+log(x)/3)/x**2) == \
(F, (4*F.x**2*ex + F.x*ex*lg - 3*ex*lg)/x3**5)
F = FracField((x, log(x), sqrt(x + log(x))), ZZ, lex)
_, lg, srt = F.gens
assert sfield((x + 1) / (x * (x + log(x))**QQ(3, 2)) - 1/(x * log(x)**2)) \
== (F, (F.x*lg**2 - F.x*srt + lg**2 - lg*srt)/
(F.x**2*lg**2*srt + F.x*lg**3*srt))
def test_sfield():
x = symbols("x")
F = FracField((E, exp(exp(x)), exp(x)), ZZ, lex)
e, exex, ex = F.gens
assert sfield(exp(x)*exp(exp(x) + 1 + log(exp(x) + 3)/2)**2/(exp(x) + 3)) \
== (F, e**2*exex**2*ex)
F = FracField((x, exp(1 / x), log(x), x**QQ(1, 3)), ZZ, lex)
_, ex, lg, x3 = F.gens
assert sfield(((x-3)*log(x)+4*x**2)*exp(1/x+log(x)/3)/x**2) == \
(F, (4*F.x**2*ex + F.x*ex*lg - 3*ex*lg)/x3**5)
F = FracField((x, log(x), sqrt(x + log(x))), ZZ, lex)
_, lg, srt = F.gens
assert sfield((x + 1) / (x * (x + log(x))**QQ(3, 2)) - 1/(x * log(x)**2)) \
== (F, (F.x*lg**2 - F.x*srt + lg**2 - lg*srt)/
(F.x**2*lg**2*srt + F.x*lg**3*srt))
def get_domain(cls, items_sympy):
K, items_K = sfield(items_sympy, field=True, extension=True)
if K.gens:
domain = K.to_domain()
else:
domain = K.domain
def convert(item):
if not item:
return domain.zero
else:
return item.numer[()] / item.denom[()]
items_K = [convert(item) for item in items_K]
return domain, items_K
