[Octave-bug-tracker] [bug #46831] Symbolic Package: Differentiation of an integral fails

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?46831>

                 Summary: Symbolic Package: Differentiation of an integral
fails
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 06 Jan 2016 07:36:10 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: Jari-Pekka Ikonen
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0
        Operating System: Microsoft Windows

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Details:

Following error:


>> diff(int(exp(exp(x)),x),x)
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 4, in <module>
NameError: name 'NonElementaryIntegral' is not defined
status =  127
out = b'<?xml version="1.0"
encoding="utf-8"?>\n<output_block>\n<item>\n<f>1003</f>\n<f>PYTHON:
Error in variable import</f>\n</item>\n</output_block>\n'
<output_block>
<item>
<f>9999</f>
<f>
&lt;class 'NameError'&gt;
</f><f>
name 'NonElementaryIntegral' is not defined
</f>
</item>
</output_block>

error: system() call failed!
error: called from
    python_ipc_sysoneline at line 92 column 5
    python_ipc_driver at line 34 column 15
    python_cmd at line 138 column 9
    diff at line 106 column 5
>>


Otherwise integration and differentiation function as expected.

Python 3.5.1, SymPy 0.7.6.1, symbolic-2.2.4, Windows 10.
Similar expression tested in Python/SymPy returns the original integrand.




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