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Re: Divergent integration result

  • To: mathgroup at smc.vnet.net
  • Subject: [mg110387] Re: Divergent integration result
  • From: Daniel Huber <danielphuber at gmail.com>
  • Date: Wed, 16 Jun 2010 05:38:37 -0400 (EDT)
  • References: <hv76ks$k3o$1@smc.vnet.net>

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.
>
>



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