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Re: Problems with solving integrals in Mathematica 9

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  • Subject: [mg131005] Re: Problems with solving integrals in Mathematica 9
  • From: "Dave Snead" <dsnead6 at charter.net>
  • Date: Sun, 2 Jun 2013 00:31:34 -0400 (EDT)
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  • References: <20130601102628.B6E6B69C7@smc.vnet.net>

You are correct!
Evaluates the integral in 8.04.
Fails to evaluate the integral in 9.01.
Looks like a bug.

-- Dave Snead

-----Original Message----- 
From: Jost Adler
Sent: Saturday, June 01, 2013 3:26 AM
To: mathgroup at smc.vnet.net
Subject: [mg131005] Problems with solving integrals in Mathematica 9

Has anybody encountered the same problems with solving integrals in Ver. 9 
as I did?

Here a very simple example:

Integrate[D[f[x], x] / f[x], {x, 0, T}]

Version 8.04 gives the correct results:

-Log[f[0]] + Log[f[T]]

In Version 9.00 as well as 9.01 this integral can't be solved. With more 
complicated integrals I had the same problems. Version 8 gives a solution, 
Version 9 doesn't!

Could some other Version 9 users try it.





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