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Question: Solutions might be lost

Question:Solutions might be lost

belief111 33
solve
March 02 2011
0

Dear all,

I have a pair of equations,

-xt[1,1]+a*tanh(xt[1,1])+a[12]*tanh(xt[2,1])=0,-xt[2,1]+a[21]*tanh(xt[1,1])+a*tanh(xt[2,1])=0

and I want to calculate xt[1,1] and xt[2,1];

when i use

solve([-xt[1,1]+a*tanh(xt[1,1])+a[12]*tanh(xt[2,1])=0,-xt[2,1]+a[21]*tanh(xt[1,1])+a*tanh(xt[2,1])=0],[xt[1,1],xt[2,1]]);

warning comes out," Warning, solutions may have been lost", and the solution [0,0] I am looking for is really lost.

Can anyone help me about how to deal with this kind of equations?

Thank you in advance!

Belief111
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