General--Simplify exponents in exponential terms

*To*: mathgroup at smc.vnet.net*Subject*: [mg68792] General--Simplify exponents in exponential terms*From*: guillaume_evin at yahoo.fr*Date*: Fri, 18 Aug 2006 03:12:54 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi! I have difficulties to simplify exponents in a big expression: Cov = E^(-(beta + 2eta)h(1 + k) lambda (-96beta^2 E^ (2 eta h(1 + k))(-1+E^beta h)^2 eta^3 mu2 + 24 E^2 eta h (1+ k)((-1+ E^(beta h)^2 eta^5 mu2 (4 + theta)^2 + 48 beta E^beta h(1 + k) .... I absolutely want to avoid exponentiels with positive exponents. For example, I could have eta>10, h=24 and k=1 when I apply this expression in the real world, which gives Cov=Nan. I don't know how to use ComplexityFunction in the function Simplify to tackle this problem. I simply want the term E^(-(beta + 2eta) to enter with the other exponential terms. Something like : Simplify[Cov, ComplexityFunction-> don't factorize exponential terms] would be perfect. Thanks 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=12774#p12774 Posted through http://www.mathematica-users.org [[postId=12774]]