Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2006
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Why all the if's the answer

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70816] Re: [mg70783] Why all the if's the answer
  • From: "Chris Chiasson" <chris at chiasson.name>
  • Date: Sat, 28 Oct 2006 05:22:01 -0400 (EDT)
  • References: <200610270428.AAA24487@smc.vnet.net>

try definite integration? use Refine? use PiecewiseExpand?

On 10/26/06, aaronfude at gmail.com <aaronfude at gmail.com> wrote:
> Suppose I start with :
>
> f = -Log[y*(1 + Cos[alpha])] + Log[(b*c - b*y + c*y*Cos[alpha] +
> Sqrt[b^2*(c - y)^2 + c^2*y^2 + 2*b*c*(c - y)*y*Cos[alpha]])/c];
>
> which I think is relatively innocent. I then integrate over y:
>
> Assuming[y > 0 &&  c > 0 && b > 0 && alpha > 0 && alpha < Pi/2,
> Integrate[y/c*f, {y, 0, c}]]
>
> After a few hours get a humongous answer with many If's, etc. What else
> can I assume or otherwise do to get an analytical answer?
>
> Many thanks in advance!
>
> Aaron Fude
>
>


-- 
http://chris.chiasson.name/


  • Prev by Date: How to change file names?
  • Next by Date: Re: package problem
  • Previous by thread: Why all the if's the answer
  • Next by thread: Re: Why all the if's the answer