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sage --version
SageMath version 10.3, Release Date: 2024-03-19
>fricas --version
FriCAS 1.3.10
based on sbcl 2.3.11
>
Sage gives AttributeError: 'NoneType' object has no attribute 'replace' on an integral which Fricas directly can do
>sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 10.3, Release Date: 2024-03-19 │
│ Using Python 3.11.8. Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
sage: print(fricas.eval(")lisp |$build_version|"))
Value = "FriCAS 1.3.10"
sage: var('x a b B y A')
(x, a, b, B, y, A)
sage: integrate((x^2+1)^(1/2)/(x^2+(x+(x^2+1)^(1/2))^(1/2)),x, algorithm="fricas")
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
Cell In[3], line 1
----> 1 integrate((x**Integer(2)+Integer(1))**(Integer(1)/Integer(2))/(x**Integer(2)+(x+(x**Integer(2)+Integer(1))**(Integer(1)/Integer(2)))**(Integer(1)/Integer(2))),x, algorithm="fricas")
File ~/TMP/sage-10.3/src/sage/misc/functional.py:788, in integral(x, *args, **kwds)
655 """
656 Return an indefinite or definite integral of an object ``x``.
657
(...)
785
786 """
787 if hasattr(x, 'integral'):
--> 788 return x.integral(*args, **kwds)
789 else:
790 from sage.symbolic.ring import SR
File ~/TMP/sage-10.3/src/sage/symbolic/expression.pyx:13268, in sage.symbolic.expression.Expression.integral()
13266 R = SR
13267 return R(integral(f, v, a, b, **kwds))
> 13268 return integral(self, *args, **kwds)
13269
13270 integrate = integral
File ~/TMP/sage-10.3/src/sage/symbolic/integration/integral.py:1062, in integrate(expression, v, a, b, algorithm, hold)
1060 if not integrator:
1061 raise ValueError("Unknown algorithm: %s" % algorithm)
-> 1062 return integrator(expression, v, a, b)
1063 if a is None:
1064 return indefinite_integral(expression, v, hold=hold)
File ~/TMP/sage-10.3/src/sage/symbolic/integration/external.py:207, in fricas_integrator(expression, v, a, b, noPole)
204 else:
205 result = e_fricas.integrate(seg)
--> 207 result = result.sage()
209 if result == "failed":
210 result = expression.integrate(v, a, b, hold=True)
File ~/TMP/sage-10.3/src/sage/interfaces/interface.py:1123, in InterfaceElement.sage(self, *args, **kwds)
1104 def sage(self, *args, **kwds):
1105 """
1106 Attempt to return a Sage version of this object.
1107
(...)
1121 [0 0]
1122 """
-> 1123 return self._sage_(*args, **kwds)
File ~/TMP/sage-10.3/src/sage/interfaces/fricas.py:1999, in FriCASElement._sage_(self)
1997 # finally translate domains with InputForm
1998 try:
-> 1999 unparsed_InputForm = P.get_unparsed_InputForm(self._name)
2000 except RuntimeError as error:
2001 raise NotImplementedError("the translation of the FriCAS object\n\n%s\n\nto sage is not yet implemented:\n%s" % (self, error))
File ~/TMP/sage-10.3/src/sage/interfaces/fricas.py:805, in FriCAS.get_unparsed_InputForm(self, var)
785 def get_unparsed_InputForm(self, var):
786 """
787 Return the unparsed ``InputForm`` as a string.
788
(...)
803
804 """
--> 805 return self.get_string('unparse((%s)::InputForm)' % str(var))
File ~/TMP/sage-10.3/src/sage/interfaces/fricas.py:755, in FriCAS.get_string(self, var)
710 """
711 Return the value of a FriCAS string as a string, without checking
712 that it is a string.
(...)
750
751 """
752 # strip removes leading and trailing whitespace, after that
753 # we can assume that the first and the last character are
754 # double quotes
--> 755 return self.get(str(var)).replace("\n", "").strip()[1:-1]
AttributeError: 'NoneType' object has no attribute 'replace'
Calling same integrate inside Fricas directly works and no exception is generated (output not show as output too large)
Steps To Reproduce
Using sagemath 10.3 with Fricas :
Sage gives
AttributeError: 'NoneType' object has no attribute 'replace'
on an integral which Fricas directly can doCalling same integrate inside Fricas directly works and no exception is generated (output not show as output too large)
Expected Behavior
No exception should be generated
Actual Behavior
Exception generated by sagemath
Additional Information
No response
Environment
Checklist
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