Re: Out[1]=((5-Sqrt[5])/20 + (5+Sqrt[5])/20 ) == 1/2 ???
- To: mathgroup at smc.vnet.net
- Subject: [mg20013] Re: Out[1]=((5-Sqrt[5])/20 + (5+Sqrt[5])/20 ) == 1/2 ???
- From: "Kevin J. McCann" <kevin.mccann at jhuapl.edu>
- Date: Sat, 25 Sep 1999 02:40:42 -0400
- Organization: Johns Hopkins University Applied Physics Lab, Laurel, MD, USA
- References: <7se6fk$qsc@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Indeed, it does seem a bit strange, especially since In[1]:= Simplify[( (5-Sqrt[5])/20 + (5+Sqrt[5])/20 ) ] Out[1]:= 1/2 -- Kevin J. McCann Johns Hopkins University APL Patrick McLean <p_mclean at postoffice.utas.edu.au> wrote in message news:7se6fk$qsc at smc.vnet.net... > Can any one explain this behaviour??? > > hilbert% math > Mathematica 3.0 for Solaris > Copyright 1988-96 Wolfram Research, Inc. > -- Terminal graphics initialized -- > > In[1]:= ( (5-Sqrt[5])/20 + (5+Sqrt[5])/20 ) == 1/2 > > $MaxExtraPrecision::meprec: > $MaxExtraPrecision = 50. reached while evaluating > 1 5 - Sqrt[5] 5 + Sqrt[5] > -(-) + ----------- + -----------. Increasing the value of > 2 20 20 > $MaxExtraPrecision may help resolve the uncertainty. > > 5 - Sqrt[5] 5 + Sqrt[5] 1 > Out[1]= ----------- + ----------- == - > 20 20 2 > > In[2]:= > > -- > Patrick McLean > > No news is good news... >