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Integral problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84799] Integral problem
  • From: "Josef Otta" <josef.otta at gmail.com>
  • Date: Tue, 15 Jan 2008 03:12:48 -0500 (EST)
  • Reply-to: josef.otta at gmail.com

Dear mathgroup,

consider the following integral:

sol=Integrate[
(4a (1-u^2)^(a-2)(s-u)s)^(-1/p), {u,0,s}, Assumptions->
{a>1,p>1,1>s>0,Element[s,Reals],Element[p,Rationals],Element[a,Rationals]}
         ]

I do not know why i got complex result, which is in this case
unexpected. does anyone have any idea? is this a bug or i overlooked
anything?

Thanks for reply

-- 
--------------------------------------------------------
 Josef Otta
 Department of Mathematics
 University of West Bohemia
 P.O. Box 314, 306 14 Plzen
 Czech Republic

 E-mail: jotta at kma.zcu.cz
 http://home.zcu.cz/~jotta
 Phone: +420-377632649
 Cell:     +420-724259334
--------------------------------------------------------


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