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