Re: FixedPoint[Cos, 1.0]
- To: mathgroup at smc.vnet.net
- Subject: [mg119398] Re: FixedPoint[Cos, 1.0]
- From: "Tony Harker" <a.harker at ucl.ac.uk>
- Date: Thu, 2 Jun 2011 07:14:29 -0400 (EDT)
I get In[40]:= FixedPoint[Cos, 1.0] Out[40]= 0.739085 In[41]:= $Version Out[41]= "8.0 for Microsoft Windows (64-bit) (February 23, 2011)" Tony Harker ]-> -----Original Message----- ]-> From: J Siehler [mailto:jsiehler at gmail.com] ]-> Sent: 31 May 2011 12:49 ]-> To: mathgroup at smc.vnet.net ]-> Subject: [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?