from sage.all_cmdline import * # import sage library
_sage_const_1en10 = RealNumber('1e-10');
+_sage_const_0 = Integer(0);
# Python imports
import warnings;
R = p.parent();
return derivative(p,R(x));
except Exception:
- return 0 ;
+ return _sage_const_0 ;
#####################################################
### Class for DD-Rings
dnum = self.base_derivation(num); dden = self.base_derivation(den);
el = self.element([dden*num - dnum*den, num*den]);
+ X = num/den;
name = str(X);
try:
name = X._DDFunction__name;
try:
return self.element([1 ],[], self.base()(X), name=str(X));
except Exception:
+ print "WHAT??";
return self(str(element));
except TypeError as e:
raise TypeError("Cannot cast an element to a DD-Function of (%s):\n\tElement: %s (%s)\n\tReason: %s" %(self, X, type(X), e));
'''
### We check some simplifications: if one of the functions is zero, then we can return directly 0
if ((other.is_null) or (self.is_null)):
- return 0 ;
+ return _sage_const_0 ;
if(self.is_one):
return other;
elif(other.is_one):
return super(DDFunction,self).__add__(self.__check_symbolic(other));
def __rsub__(self, other):
- return super(DDFunction,self).__sub__(self.__check_symbolic(other));
+ return (-self) + self.__check_symbolic(other);
def __rmul__(self, other):
return super(DDFunction,self).__mul__(self.__check_symbolic(other));
def __rdiv__(self, other):
- return super(DDFunction,self).__div__(self.__check_symbolic(other));
+ return self.inverse * self.__check_symbolic(other);
def __iadd__(self, other):
return super(DDFunction,self).__add__(self.__check_symbolic(other));
'''
Missing method for DDFuntions.
'''
- return 0 ;
+ return _sage_const_0 ;
def __str__(self, detail=True):
'''
## Constant case
if(poly.is_constant()):
if(m > 0):
- return 0;
+ return _sage_const_0;
return poly.parent().base()(poly);
## Non-constant polynomial
projects / ajpastor / diff_defined_functions.git / commitdiff