Maxima can't do this integral???
- Subject: Maxima can't do this integral???
- From: Barton Willis
- Date: Fri, 7 Aug 2009 12:00:35 -0500
(%i1) integrate(%e^(-kappa*r)*sin(k*r),r,0,inf);
Is kappa positive, negative, or zero?pos;
(%o1) k/(kappa^2+k^2)
(%i2) build_info();
Maxima version: 5.18.1
Maxima build date: 20:57 4/19/2009
host type: i686-pc-mingw32
lisp-implementation-type: GNU Common Lisp (GCL)
lisp-implementation-version: GCL 2.6.8
Barton
-----maxima-bounces at math.utexas.edu wrote: -----
>I've?got?a?trivial?integral?that?maxima?doesn't?seem?to?be?able?to?do;
>I'm?having?trouble?believing?this.??Can?someone?confirm?
>
>?integrate(%e^(-kappa*r)*sin(k*r),r,0,inf);
>
>(kappa>0)?I?get?the?integral?form?when?I?do?this.
>
>(The?answer?is?k/(k^2+kappa^2))
>
>
>David