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MathGroup Archive 1999

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Out[1]=((5-Sqrt[5])/20 + (5+Sqrt[5])/20 ) == 1/2 ???

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19976] Out[1]=((5-Sqrt[5])/20 + (5+Sqrt[5])/20 ) == 1/2 ???
  • From: p_mclean at postoffice.utas.edu.au (Patrick McLean)
  • Date: Thu, 23 Sep 1999 23:26:23 -0400
  • Organization: Maths Dept, University of Tasmania
  • Sender: owner-wri-mathgroup at wolfram.com

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...


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