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From: Torsten Hennig on 15 Mar 2010 06:18 > > y(1) becomes arbitrarily large as t approaches > > 4.828591e-3. > > The reason for the solver to quit lies in your > model > > equations. > > > > Best wishes > > Torsten. > > Dear Torsten, > > It makes sence. However, the equation works in > mathematica and was copied from an official research > paper with tested parameters. See the picture below > with the set of ODE's: > > http://jutas.eet.bme.hu/~exi/soton/ODE.png > > Thank you for your help. > > Regards, > > Marton If you want to solve the above equations, change your denominator in dydt(1) from 1+B^2 to 1+A^2. Best wishes Torsten.
From: Bjorn Gustavsson on 15 Mar 2010 10:21 "Marton Buda" <existen1(a)freemail.hu> wrote in message <hnlf0m$jjd$1(a)fred.mathworks.com>... > > y(1) becomes arbitrarily large as t approaches > > 4.828591e-3. > > The reason for the solver to quit lies in your model > > equations. > > > > Best wishes > > Torsten. > > Dear Torsten, > > It makes sence. However, the equation works in mathematica and was copied from an official research paper with tested parameters. See the picture below with the set of ODE's: > > http://jutas.eet.bme.hu/~exi/soton/ODE.png > > Thank you for your help. > Nope. You have a typo in your code. For yp(1) you have: (...)/(1+y(2)^2) and you should have (...)/(1+y(1)^2) HTH, Bjeorn
From: Marton Buda on 15 Mar 2010 16:25
> Nope. You have a typo in your code. For yp(1) you have: > (...)/(1+y(2)^2) and you should have (...)/(1+y(1)^2) > > HTH, > Bjeorn Thank you soo much Bjeorn, i was not looking at it precisely. Kind regards, Marton |