#15840: Residues in SymbolicRing
-------------------------------------+-------------------------------------
       Reporter:  dkrenn             |        Owner:
           Type:  enhancement        |       Status:  needs_review
       Priority:  major              |    Milestone:  sage-6.2
      Component:  symbolics          |   Resolution:
       Keywords:                     |    Merged in:
        Authors:  Daniel Krenn       |    Reviewers:  Marc Mezzarobba
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
  u/mmezzarobba/15840-residue        |  9997eaaa8f35ccbc1034403ccc4b8434d30f2559
   Dependencies:                     |     Stopgaps:
-------------------------------------+-------------------------------------
Changes (by mmezzarobba):

 * reviewer:   => Marc Mezzarobba
 * branch:  u/dkrenn/ticket/15840 => u/mmezzarobba/15840-residue
 * commit:  ddca280e94f7f53180ceed35df5cda4e384fbb4b =>
     9997eaaa8f35ccbc1034403ccc4b8434d30f2559


Comment:

 Hi Daniel,

 Thanks for your patch!

 Your code didn't work on expressions such as 1/s² (with that particular
 variable name). I think I fixed it.

 I am still not too happy about the following:
 {{{
 sage: var('s')
 sage: (x^s).residue(x,0)
 0
 }}}
 but it's not clear to me what the code should do in such cases.

 Also, I wonder if we shouldn't prefer a syntax such as
 `expr.residue(x==a)` for consistency with `series()`.
 ----
 New commits:
 
||[http://git.sagemath.org/sage.git/commit/?id=9997eaaa8f35ccbc1034403ccc4b8434d30f2559
 9997eaa]||{{{Various improvements to expr.residue()}}}||

--
Ticket URL: <http://trac.sagemath.org/ticket/15840#comment:8>
Sage <http://www.sagemath.org>
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