Re: Solve problem
- To: mathgroup at smc.vnet.net
- Subject: [mg98138] Re: Solve problem
- From: "Bruno Campanini" <BC at gmail.com>
- Date: Tue, 31 Mar 2009 04:18:16 -0500 (EST)
- References: <gqkv3d$4f6$1@smc.vnet.net>
"Bob Hanlon" <hanlonr at cox.net> wrote in message news:gqkv3d$4f6$1 at smc.vnet.net... > a1 /. Select[{{b1 -> -2, a1 -> -1}, {b1 -> 0.5, a1 -> 3}}, > (a1 /. #) > 0 &] > > {3} > > Cases[{{b1 -> -2, a1 -> -1}, {b1 -> 0.5, a1 -> 3}}, > (a1 -> x_ /; x > 0) :> x, Infinity] > > {3} > > Or instead of using Solve use Reduce and include constraint on a1 Ok Bob. Thank you and thank all the people that gave me such useful info. Bruno