def __init__(self, ambient, category):
self._ambient = ambient
Parent.__init__(self, category=category.IsomorphicObjects())
# Bricolage
self._remove_from_coerce_cache(ambient)
phi = SetMorphism(Hom(ambient, self, category), self.retract)
phi.register_as_coercion()
def __init__(self, R, repr_var1 = 'x', repr_var2 = 'y', inversed_ring = None):
self._coeffs_ring = MultivariatePolynomialAlgebra_generic(R, repr_var2, always_show_main_var = True)
MultivariatePolynomialAlgebra_generic.__init__(
self,
self._coeffs_ring,
repr_var1,
always_show_main_var = True,
extra_bases_category = Finite_rank_double_bases()
)
self._repr_var1 = repr_var1
self._repr_var2 = repr_var2
self._coeffs_base_ring = R
if(inversed_ring is None):
self._inversed_ring = DoubleMultivariatePolynomialAlgebra_generic(R, repr_var2, repr_var1, self)
else:
self._inversed_ring = inversed_ring
m = SetMorphism( Hom(self, self.inversed_ring()), lambda x : x.swap_coeffs_elements())
m.register_as_coercion()
