On Monday, June 25, 2012 11:06:28 AM UTC-4, kcrisman wrote: > > > > On Sunday, June 24, 2012 11:00:48 PM UTC-4, Slumberland wrote: >> >> I don't think Sage knows what it is doing with the dirac_delta. Since it >> *thinks* it does, does this qualify as a bug? >> >> For example, Sage is quite happy to return an answer to >> sage: f = dirac_delta(x) >> sage: n(integrate(f,x,-infinity,infinity)) >> 0 >> >> > Yes, please do submit a Trac ticket for this and anything else mentioned > in this thread. A few functions like this were added, but not really > integrated with other stuff in Sage very well. Maxima apparently does not > currently have the Dirac delta "function" (distribution?) anywhere except > in pw.mac, which we do not use. > > > >
>>> You can use sympy as - >>> >>> >>> import sympy >>> >>> sympy.integrate(sympy.DiracDelta(x), (x,-1,1)) >>> 1 >>> >>> And we should be able to do sage: integrate(f,x,-oo,oo,algorithm='sympy') but NotImplementedError: SymPy function 'dirac_delta' doesn't exist so there is definitely some work that could be done here. > -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
