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>