The following commands:
var("x,y")
(incomplete_gamma(x,y).diff(x)).simplify()
give the following error (on cloud.sagemath.com):
Error in lines 2-2 Traceback (most recent call last): File
"/projects/367dddb5-9cc5-40f5-bd01-50bab618f735/.sagemathcloud/sage_server.py",
line 736, in execute exec compile(block+'\n', '', 'single') in namespace,
locals File "", line 1, in <module> File "expression.pyx", line 7999, in
sage.symbolic.expression.Expression.simplify
(build/cythonized/sage/symbolic/expression.cpp:35401) File
"expression.pyx", line 585, in sage.symbolic.expression.Expression._maxima_
(build/cythonized/sage/symbolic/expression.cpp:5366) File
"sage_object.pyx", line 580, in
sage.structure.sage_object.SageObject._interface_
(build/cythonized/sage/structure/sage_object.c:4781) File
"/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/interfaces/interface.py",
line 199, in __call__ return cls(self, x, name=name) File
"/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/interfaces/interface.py",
line 626, in __init__ raise TypeError(x) TypeError: ECL says: Error
executing code in Maxima: gamma: wrong number of arguments.
I suspect that the problem is that Sage (sometimes?) treats gamma and
incomplete_gamma as the same function, but Maxima doesn't, and the
interface doesn't take that into account.
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