#7334: Sage cannot simplify sums of logarithms
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Reporter: whuss | Owner: burcin
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.2.1
Component: calculus | Keywords: logarithm
Work_issues: | Author: whuss
Reviewer: | Merged:
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Comment(by robert.marik):
Replying to [comment:2 kcrisman]:
> Anyway, then you could just call this wherever you think is best in the
definition of .simplify_full(), which certainly should have this included.
Do not do it please. The user knows if he/she wants to contract logarithms
or not and then he/she can run the coresponding method. If you include
this as an automatical simplification in simplify_full, consider the
following
* domain of log(1-x)+log(1+x) is different from domain of log(1-x^2)
* you should add a function which expands logarithms
Thanks
Robert
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7334#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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