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Re: extract from Reduce

  • To: mathgroup at smc.vnet.net
  • Subject: [mg130371] Re: extract from Reduce
  • From: Šerých Jakub <Serych at panska.cz>
  • Date: Thu, 4 Apr 2013 22:35:56 -0400 (EDT)
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  • References: <20130404025057.81F326A68@smc.vnet.net>

Try ToRules[] and than /. and you have pure list of results. For example:

x /. {ToRules[Reduce [x^8 == 1]]}

Jakub

> -----Original Message-----
> From: hamiltoncycle at gmail.com [mailto:hamiltoncycle at gmail.com]
> Sent: Thursday, April 04, 2013 4:51 AM
> To: mathgroup at smc.vnet.net
> Subject: extract from Reduce
>
> I have a result from the command Reduce that looks like this (as an
> example):
>
> a:= x==3||x==4||x==7
>
> I need to extract the numbers but I can't find a nice way to handle the case
> when there is only one equation, for instance:
>
> a:= x==6
>
> currently I check what the head of the expression is (Head[a]) and handle
> the case Head[a]=Or with a Map[] and the case Head[a]="Equal" with a[[2]].
> Not very nice, but I guess that there is a neat way to do it.
>
> cheers, Robert




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