Re: Mathematical question: Exponetial function

*To*: mathgroup at smc.vnet.net*Subject*: [mg18101] Re: Mathematical question: Exponetial function*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Thu, 17 Jun 1999 12:26:38 -0400*Organization*: Universitaet Leipzig*References*: <7juc1d$57u@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, it is shorter to store Power[E,Plus[a,b]] than Times[Power[E,a],Power[E,b]] Only in this consistent way exponents can be simplifyed. There are still other mysteries Why Mathematica simplifyes 4*2 -> 8 a*a -> a^2 Regards Jens Drago Ganic wrote: > > Why Mathematica automaticaly expand > E^u E^v > to > E^(u+v). > > but never the inverse situation, ie. E^(u+v) -> E^u E^v. > > In my textbooks I find that the relation a^(u+v) = a^u a^v is valid for any > a, u, v (also Comlex numbers) except a=0. > > Thanks in advance. > > Drago, > Croatia