Re: FixedPoint[Cos, 1.0]

*To*: mathgroup at smc.vnet.net*Subject*: [mg119373] Re: FixedPoint[Cos, 1.0]*From*: "Dr. Wolfgang Hintze" <weh at snafu.de>*Date*: Wed, 1 Jun 2011 04:32:32 -0400 (EDT)*References*: <is2kjq$qrm$1@smc.vnet.net>

Let`s go one step further down in version: In[1]:= FixedPoint[Cos, 1.0] Out[1]= 0.739085 In[2]:= $Version Out[2]= 5.2 for Microsoft Windows (June 20, 2005) Regards, Wolfgang "J Siehler" <jsiehler at gmail.com> schrieb im Newsbeitrag news:is2kjq$qrm$1 at smc.vnet.net... > 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? >