Re: Expression transformation
- To: mathgroup at smc.vnet.net
- Subject: [mg59292] Re: [mg59268] Expression transformation
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Fri, 5 Aug 2005 01:21:22 -0400 (EDT)
- References: <200508040607.CAA26418@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On 4 Aug 2005, at 08:07, mumbojumbo wrote: > Dear forum, > > How can I persuade Mathematica to transform the expression > Exp(-x)+(a+b Exp[-x])/c > to the form > (a+(b+c)Exp(-x))/c > > I have tried Together[...] and Simplify, but I always get > (b + c + a*E^x)/(c*E^x) > It looks like Mathematica is silently transforming Exp[-x] to > 1/Exp[x]. How can I disable this transformation? > > I am asking because in applications some equivalent forms are more > equivalent than others e.g. Exp[-u/(kT)]-1 is considered a proper > form, > while (1- Exp[u/(kT)])/Exp[u/(kT)] is not. > > Thanks, Yuri. > > mailto:mjumbo at gmail.com > > Is this near enough Collect[Exp[-x] + (a + b*Exp[-x])/c, Exp[-x], Together] a/c + (b + c)/(E^x*c) ? Andrzej Kozlowski
- References:
- Expression transformation
- From: mumbojumbo <mjumbo@gmail.com>
- Expression transformation