Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: Divergent integration result
Replies: 2   Last Post: Jun 16, 2010 5:41 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Daniel Huber

Posts: 7
Registered: 6/16/10
Re: Divergent integration result
Posted: Jun 16, 2010 5:38 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Hi Kamil,
your integrand has a term that is porportional to 1/r near zero and can
therefore not be integrated from 0 to 10.
cheers, Daniel

Am 15.06.2010 08:29, schrieb Kamil:
> Hello all,
> I tried to evaluate the integral below,
> integrandnumcc =
> Integrate[(D[wcc, {r, 2}]^2 + (1/r D[wcc, r])^2 +
> 2 v 1/r D[wcc, r]*D[wcc, {r, 2}]) r, {r, 0, 1}]
> where
> wcc = (r - r^2) + n (r - r^3);
> What I am getting is:
> Integrate::idiv: Integral of -4-4 n+1/r+(2 n)/r+n^2/r+8 r-6 n r-6 n^2 r
> +36 n r^2+45 n^2 r^3+<<7>> does not converge on {0,10}.>>
> Can anybody help find what is wrong?
> Help will be apprecated.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2015. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.