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MathGroup Archive 2006

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Re: solve and Abs

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69398] Re: solve and Abs
  • From: Peter Pein <petsie at dordos.net>
  • Date: Sun, 10 Sep 2006 07:20:40 -0400 (EDT)
  • References: <edtrmv$le6$1@smc.vnet.net>

Richard J. Fateman schrieb:
> Is there a reason (in 5.1) for Solve[x-Abs[x]==0,x] to return {{}}?
> This supposedly means all variables can have all possible values.
> 
> Reduce does better.
> 
Oops, I should have read further...
Help says
"Solve gives {{}} if all variables can have all possible values."
I would consider this a bug, not a feature.

Sorry for overhasty posting,
Peter


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