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MathGroup Archive 2004

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FindRoot s all

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49415] FindRoot s all
  • From: mathma18 at hotmail.com (Narasimham G.L.)
  • Date: Sun, 18 Jul 2004 08:09:24 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

y[u_,c_]=c^u-u^c-1 ;
Plot[y[x,2],{x,-5,5}]; FindRoot[y[x,2]==0,{x,-5,5}];
" Solution settles to a value outside the interval
of roots of its derivative (humps and valleys),it may be 
the problem of Newton-Raphson diverging tangets.How to
capture all roots [in this case {x -> 0, 1}] ? It should be 
valid for all c."
TIA


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