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Re: equation solving in a markov model


omur.tosun at gmail.com wrote:
> and i forgot to write my question...
> 
> i use x=D[A,Lambda(in)] then Solve[x==0,Lambda(in)] but couldn't find
> any solution.
> 
> it gives error massages like using inverse function or equations
> appear to involve the variables to be solved for in an essential non-
> algebric way ..
> 
> what am i doing wrong??
> 
> 

You could try *Reduce* and use assumptions and/or domain specification. 
For instance,

Reduce[D[A, Lambda[in]] == 0, Lambda[in]]
Reduce[D[A, Lambda[in]] == 0 && k > 0, Lambda[in]]
Reduce[D[A, Lambda[in]] == 0, Lambda[in], Reals]
Reduce[D[A, Lambda[in]] == 0 && 0 < k <= n && a > 0, Lambda[in], Reals]

(Note that in the above examples, the values I have used are just there 
to illustrate what you can do with *Reduce*. I have not tried to solve 
the equation.)

Regards,
Jean-Marc


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