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Re: Simplify by Recurrence Relations

• To: mathgroup at smc.vnet.net
• Subject: [mg75791] Re: Simplify by Recurrence Relations
• From: CKWong.P at gmail.com
• Date: Thu, 10 May 2007 05:24:43 -0400 (EDT)
• References: <f1s3n1$h2g$1@smc.vnet.net>

ruleB = BesselJ[ n_ /; Positive[n - 1], z_]  -> 2(n - 1)/z BesselJ[n -
1, z] - BesselJ[n - 2,  z];

Example:
  BesselJ[4, z] //. ruleB

  D[BesselJ[2, x], x] //. ruleB