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 Author Comment/Response Éric Brunet 12/13/99 09:24am I have just bought mathematica 4.0, and I would like to suggest some minor improvements for future versions. I understand that there are many ways do go around the ``problems'' I present, but I still think that the default behavior could be nicer. * Simplify[ Gamma[n+1], Element[n, Integers] ] I think that this should get simplified into n! * Series[x,{x,Infinity,0}] while correct, the result looks ridiculous. * s=Series[ Exp[ -t x], {x,0,4}] Integrate[ s Exp[-t],{t,0,Infinity}] doesn't work. (It says: Limit::''nonopt'':       ''Options expected (instead of #4) beyond          position 2 in Limit[#1, #2, #3, #4]. An option must be a rule or a list of             rules.'') On the other hand, if I enter i=Integrate[ s Exp[-t],{t,0,A}] Limit[i,A->Infinity], I get the result expected. * I want to define a linear operator A on functions A[f_ + g_] := A[f] + A[g] .... D[A[f_],d__] ^:= A[ D[f,d] ] Now this works If I do D[ A[ Exp[t x] ] , {t,3}] But doesn't give the expected result if I ask for Series[ A[ Exp[t x] ], {t,0,3}] Isn't the operator D used for Series ? Éric Brunet URL: ,

 Subject (listing for 'Some mis-behaviours') Author Date Posted Some mis-behaviours Éric Brunet 12/13/99 09:24am Re: Some mis-behaviours Aaron Honecker 12/14/99 3:14pm
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