Subject: Bug in changevar. Should I submit the bug report?
From: Robert Marik
Date: Sat, 24 Mar 2012 20:53:48 +0000 (UTC)
Helo, thanks for the suggestion.
changevar can be used to substitute 2* x=t in
1/2*'integrate(exp(2*x),x)
but changevar1 fails with the following error
(%i4) changevar(('integrate(exp(2*x),x))/2,2*x = t,t,x)
(%o4) ('integrate(%e^t,t))/4
(%i5) changevar1(('integrate(exp(2*x),x))/2,2*x = t,t,x)
expt: undefined: 0 to a negative exponent.
#0: changevar1(s=('integrate(%e^(2*x),x))/2,tr=2*x = t,t=t,x=x)(a.mac line 1)
-- an error. To debug this try: debugmode(true);
Robert Marik
Aleksas Domarkas <aleksasd873 <at> gmail.com> writes: