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Topic: Integration..Constants
Replies: 1   Last Post: Oct 30, 1996 9:49 PM

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Dennis Michael Winters

Posts: 2
Registered: 12/7/04
Posted: Oct 30, 1996 12:29 AM
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I have tried several times to perform an integration(math..2.2.3)B
similar to the following.

In[1]:=Integrate[(ao+x)^-1 (bo^-2), x]

The results, however, are always incorrect:

Out[1]=-ln(-ao+x) <---where the constant "ao" should be positive.

Note: The above is not the exact problem and solution. It is only an
example of the type of problem I have been having with the program.

I have tried to specify the value of "ao" before integrating:

In[1]:=SetAttribute[ao, Constant]


In[1]:=SetAttribute[ao, Protected]

or a combination of the two.

I have also tried:

In[1]:=ao/. Sign[ao]=1

To try and get a positive result. I have also tried MathCad 6.0+ and
gotten the same results. It appears to be a problem for both programs.
(For those that might think that I am the one with the problem, I would
like to say that a tenured prof and a postdoc agreed that there is a
problem with the program). If you know of a solution, or can point me in
a different direction, I would greatly appreciate it. This would save me
from having to contact Wolfram about his program.

---------------------------------- -Dennis M. Winters -
-P.O. BOX 21215 -
-ATLANTA, GA 30322 - -

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