Re: Solve problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg98039] Re: Solve problem*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Sat, 28 Mar 2009 05:45:21 -0500 (EST)*References*: <gqia56$oim$1@smc.vnet.net>

Hi, Select[{{b1 -> -2, a1 -> -1}, {b1 -> 0.5, a1 -> 3}}, a1 > 0 /. # &] ? Regards Jens Bruno Campanini wrote: > I have a Solve[...] which gives me solutions like > {{b1 -> -2, a1 -> -1 }, {b1 -> 0.5, a1 -> 3}} > or like > {{a1 -> 1, b1 -> 3}} > > How can I get the positive value for a1, which is 3 > in the first case and 1 in the second one? > > Bruno >