Strange empty set of solutions
- To: mathgroup at smc.vnet.net
- Subject: [mg71771] Strange empty set of solutions
- From: José Carlos Santos <jcsantos at fc.up.pt>
- Date: Tue, 28 Nov 2006 06:04:25 -0500 (EST)
Hi all,
I have a certain 3 x 3 numerical matrix M. If I type
Solve[M.{a,b,c}=={0,0,0},{a,b,c}]
I get
{{a -> 0. + 0.0410026 c, b -> 0. + 1.35294 c}}
However, if I type
Solve[{M.{a,b,c}=={0,0,0},a^2+b^2+c^2==1},{a,b,c}]
I get the empty set. Why is that? I should get two solutions!
Best regards,
Jose Carlos Santos