Re: Assumptions does not work in Eliminate?

*To*: mathgroup at smc.vnet.net*Subject*: [mg127915] Re: Assumptions does not work in Eliminate?*From*: Bob Hanlon <hanlonr357 at gmail.com>*Date*: Fri, 31 Aug 2012 04:01:46 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <20120829051425.4BC8B687E@smc.vnet.net>

?? $Assumptions $Assumptions is the default setting for the Assumptions option used in such functions as Simplify, Refine, and Integrate. >> $Assumptions=True Options[Eliminate, Assumptions] Options::optnf: Assumptions is not a known option for Eliminate. >> {} Consequently, $Assumptions = {b > 0}; Eliminate[{a/b == c, a == d}, a] // Simplify b c == d Bob Hanlon On Thu, Aug 30, 2012 at 4:07 AM, <"Andreas Talmon l'Arm=E9e"@smc.vnet.net> wrote: > Hello, > > I am trying to use the $Assumptions command with the Eliminate in the > following form: > > > $Assumptions = {b > 0} > > Eliminate[{a/b == c, a == d}, a] > > > > The answer I get is: > > d == b c && b != 0 > > > > The b!=0 is sensless for me because I stated b>0 above. > What am I doing wrong? > > Thanks, Andreas >

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