Re: [sage-devel] Re: problems with Bessel functions

2009-12-09 Thread Robert Bradshaw
On Dec 9, 2009, at 5:40 AM, Pablo De Napoli wrote: > Many thanks to everybody for your help. > > some questions/remarks: > > 1) ¿Does every function needs to have two versions: a symbolic one and > a numerical one? Somewhat. The situation arises because one often only defines the function numer

Re: [sage-devel] Re: problems with Bessel functions

2009-12-09 Thread Pablo De Napoli
Many thanks to everybody for your help. some questions/remarks: 1) ¿Does every function needs to have two versions: a symbolic one and a numerical one? 2) the current implementation treats f(x)=sin(x) as a symbolic expression sage: f(x)=sin(x) sage: f x |--> sin(x) sage: type(f) However, math

Re: [sage-devel] Re: problems with Bessel functions

2009-12-09 Thread Mike Hansen
On Wed, Dec 9, 2009 at 7:01 PM, Nathann Cohen wrote: > Would it be possible, using this, to define a symbolic Sum ? Something > like Sum(Set([1,2,3,4,5,6]))...This would be extremely useful in What would the output of that be? There is http://trac.sagemath.org/sage_trac/ticket/3587 , but I don't