Re: Simplify by Recurrence Relations
- To: mathgroup at smc.vnet.net
- Subject: [mg75792] Re: Simplify by Recurrence Relations
- From: psycho_dad <s.nesseris at gmail.com>
- Date: Thu, 10 May 2007 05:25:15 -0400 (EDT)
- References: <f1s3n1$h2g$1@smc.vnet.net>
Hi, I think this should do the trick: In[1]:= db=D[BesselJ[2,x],x]; In[2]:= db//.BesselJ[n_,x_] -> (2(n-1)/x BesselJ[n-1,x]-BesselJ[n-2,x])// Expand It could be done in other ways as well, but this is what I came up during my coffeebreak. Cheers, psycho_dad