Re: fibonacci question

*To*: mathgroup at smc.vnet.net*Subject*: [mg119479] Re: fibonacci question*From*: Robert Rosenbaum <robertr at math.uh.edu>*Date*: Sun, 5 Jun 2011 07:05:23 -0400 (EDT)

Curiously, the following expression evaluates to True: FullSimplify[Fibonacci[cn] + Fibonacci[cn + 1] == Fibonacci[cn + 2]] Best, Robert On Jun 4, 2011, at 5:19 AM, olfa wrote: > Hello Mathematica community, > > why FullSimplify[Fibonacci[cn] + Fibonacci[cn + 1]] is not simplified > into Fibonacci[cn+2]? > what mathematica function should I use to get this output? > > thank you very much for your help. >