Hi everybody,
Can anybody tell me if there is something wrong here
(%i0) kill(all);
(%i1) 'diff(p,t,1); 'diff(%theta,t,1); 'diff(r,t,1); 'diff(%phi,t,1);
(%o1) 'diff(p,t,1)
(%o2) 'diff(%theta,t,1)
(%o3) 'diff(r,t,1)
(%o4) 0
Why is %04 zero?
Thank you very much
--
M. Sc. Juan Pablo Carbajal
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PhD Student
University of Z?rich
www.ailab.ch/carbajal