Re: Replace in recursive equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg54372] Re: Replace in recursive equations*From*: highegg at centrum.cz (highegg)*Date*: Sat, 19 Feb 2005 02:32:35 -0500 (EST)*References*: <7ly23jyhsc2l@legacy>*Sender*: owner-wri-mathgroup at wolfram.com

On 18 Feb 05 12:22:53 -0500 (EST), Skirmantas wrote: >The last sentence of my previous message about Inverse got somehow >scrambled. I meant "I have to re-input the output to get the result." > >One more quick question. Suppose I have a recursive equation F[n+1]==a >F[n]. I want to replace F[n]->FF[n]+Q for _all_ n's. Q is a constant. >What is the best way to do it? The left side should become FF[n+1]+Q >and the right a(FF[n]+Q). Any help would be appreciated. just use (your equation) /. F[expr_]->FF[expr]+Q regards, highegg