Dealing with exp functions
- Subject: Dealing with exp functions
- From: Richard Fateman
- Date: Sun, 05 May 2002 11:11:44 -0700
try ratsubst (A, exp(a1*x4),d1);
Maths & Geometry Crew wrote:
> Given the following expression F:
>
> (C1) F : - G1*x6 - 2*a1*DD1*%E^(-2*a1*x4)*(%E^(a1*x4) - 1) - chi*(1-x1)/2;
>
> a1 x4 - 2 a1 x4 chi (1 - x1)
> (D1) - 2 a1 DD1 (%E - 1) %E - G1 x6 - ------------
> 2
>
>
> I am trying to factor E^(-a1 x4) out of the first term, to get:
>
>
> - a1 x4 - a1 x4 chi (1 - x1)
> ...) - 2 a1 DD1 (1 - %E ) %E - G1 x6 - ------------
> 2
>
> - a1 x4
> so as to be able to replace %E with one symbol A
>
>