#20191: implement ExprCondPair equivalent
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.2
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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This shows an equivalent to SymPy's `ExprCondPair` is missing in Sage:
{{{
sage: _ = var('y, z')
sage: (x^y - z).integrate(y)
-y*z + x^y/log(x)
sage: (x^y - z).integrate(y, algorithm="sympy") # see Trac #14694
Traceback (most recent call last):
...
AttributeError: 'ExprCondPair' object has no attribute '_sage_'
SymPy-1.0:
>>> integrate(x**y-z,y)
⎛⎧ y for log(x) = 0⎞
⎜⎪ ⎟
⎜⎪ y ⎟
-y⋅z + ⎜⎨ x ⎟
⎜⎪────── otherwise ⎟
⎜⎪log(x) ⎟
⎝⎩ ⎠
}}}
When it is implemented a SymPy patch should be done for the `_sage_`
method.
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Ticket URL: <http://trac.sagemath.org/ticket/20191>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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