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Topic: Problems with solving integrals in Mathematica 9
Replies: 2   Last Post: Jun 2, 2013 12:26 AM

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Dave Snead

Posts: 52
Registered: 12/13/04
Re: Problems with solving integrals in Mathematica 9
Posted: Jun 2, 2013 12:26 AM
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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
Subject: 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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