Services & ResourcesWolfram ForumsMathGroup Archive

[Date Index] [Thread Index] [Author Index]

General--Exponential simplifications by default

• To: mathgroup at smc.vnet.net
• Subject: [mg68966] General--Exponential simplifications by default
• From: guillaume_evin at yahoo.fr
• Date: Fri, 25 Aug 2006 05:35:30 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi !

I want to avoid simplifications when Mathematica integrates expressions with exponential terms. For example, I have :

In[8]=      Espcond[y_] = Integrate[x*Densx[x, y], {x, 0, Infinity}, Assumptions -> alpha > 0]
Out[8]=      E^(-2eta y)(-theta + E^(eta y)(2+theta))/(2alpha)

I do not want to have a factorization by E^(-2eta y). More precisely I would like to have the following result:
Out[8]=      (-theta E^(-2eta y)+ E^(-eta y)(2+theta))/(2alpha)

I guess there is a way to tackle this problem with "ComplexityFunction" and "Simplify", but I tried different things such as "ComplexityFunction -> (Count[{#1}, Exp_, ∞] &)" in the "Simplify" function but no change appears.

Is someone could give me some tricks on how tu use the "ComplexityFunction" ?

Thank you in advance.

Guillaume

Link to the forum page for this post:
http://www.mathematica-users.org/webMathematica/wiki/wiki.jsp?pageName=Special:Forum_ViewTopic&pid=12974#p12974
Posted through http://www.mathematica-users.org [[postId=12974]]

• Follow-Ups:
  • Re: General--Exponential simplifications by default
    • From: Daniel Lichtblau <danl@wolfram.com>