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Re: equation solving in a markov model
*To*: mathgroup at smc.vnet.net
*Subject*: [mg75278] Re: equation solving in a markov model
*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
*Date*: Mon, 23 Apr 2007 05:42:45 -0400 (EDT)
*Organization*: The Open University, Milton Keynes, UK
*References*: <f09gse$16k$1@smc.vnet.net> <f0el5s$q5h$1@smc.vnet.net>
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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