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- From: schwab@ariel.mathematik.uni-kl.de (Hartmut Schwab)
- Newsgroups: sci.math.symbolic
- Subject: Mma: can't define rule for partial integration
- Message-ID: <1992Aug16.132102.23006@rhrk.uni-kl.de>
- Date: 16 Aug 92 13:21:02 GMT
- Sender: news@rhrk.uni-kl.de
- Reply-To: ricks@berkeley.edu
- Organization: UC Berkeley IC CAD Group
- Lines: 32
-
-
- I tryed to define a rule for partial Integration in Mathematica.
- But I had some Problems doing it. I don't find a solution, how
- to put the upper and the lower value in the first part of the
- solution.
-
- In the Book it is written like that:
-
- b b b
- Integral(f*g') = [ f* g(x)] - Integral(f' * g)
- a a a
-
- I started the rule like that:
- regel = Integrate[Times[a_,b_],c_List] :> a*Integrate[b,c]
- - Integrate[ D[a, c[[1]] ]* Integrate[b,c], c]
-
- As You see, the upper and lower value are not put in the
- first part of the solution.
-
- To get arround the problem I tryed to do something like:
- a*Integrate[b,c]/. c[[1]] -> c[[3]]
-
- I got an Errormessage because Mathematica evaluated c[[1]] etc.
- Part::partd: Part specification c[[1]] is longer than depth of object.
-
- How can I go arround that Problem and put in the upper and lower
- values?
-
- Thanks for any help.
-
- Hartmut Schwab
- schwab@mathematik.uni-kl.de
-