Re: FixedPoint[Cos, 1.0]

*To*: mathgroup at smc.vnet.net*Subject*: [mg119370] Re: FixedPoint[Cos, 1.0]*From*: "becko" <becko565 at hotmail.com>*Date*: Wed, 1 Jun 2011 04:31:59 -0400 (EDT)

FixedPoint[Cos, 1.0] works quickly for me, returning 0.73908 as expected. -------------------------------------------------- From: "J Siehler" <jsiehler at gmail.com> Sent: Tuesday, May 31, 2011 4:49 AM To: <mathgroup at smc.vnet.net> Subject: [mg119370] [mg119351] FixedPoint[Cos, 1.0] > My numerical analysis students this past term pointed out to me that > the command > > FixedPoint[Cos, 1.0] > > which is the first example in the Information for FixedPoint doesn't > ever finish running (or, not in any reasonable amount of time). We > tried this on serveral versions of Mathematica (6.x, 7.x, and 8.x), > all on OS X, and got the same nonresult. > > It can be forced by specifying something like FixedPoint[Cos, 1.0, > SameTest -> (Abs[#1 - #2] < 10^-10 &)] or FixedPoint[Cos, 1.0, 40], > but it seems like that should be unnecessary, and the form given in > the documentation should work. Can anybody else confirm this > behavior? Am I missing something totally obvious here? > >