Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

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

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Dennis Michael Winters

Posts: 2
Registered: 12/7/04
Integration..Constants
Posted: Oct 30, 1996 12:29 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

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]

or

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 -
-EMORY UNIVERSITY -
-ATLANTA, GA 30322 -
-dwint01@emory.edu -
-or winters@euch6h.chem.emory.edu-
----------------------------------

















Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.