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

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 Daniel Huber Posts: 7 Registered: 6/16/10
Re: Divergent integration result
Posted: Jun 16, 2010 5:38 AM

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.
>
>

Date Subject Author
6/15/10 Kamil
6/16/10 Daniel Huber
6/16/10 Alexei Boulbitch