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 Author Comment/Response sean 08/19/03 11:39am Hi, Im new to mathematica but i want to solve two simultaneous differential equations as a function of length (z=0 to L). The equations are dq/dz=(a/(1+p+q))*(u*p+1)*q dp/dz=(b/(1+p+q))*(u*q-1)*p As you can see both p and q vary with z.How might I go about solving (integrating) this? What I have tried so far is involves the DSolve function, Ie DSolve[{p'[z]==(b/(1+p[z]+q[z]))*(u*q[z]-1)*p[z], q'[z]==(a/(1+p[z]+q[z]))*(u*p[z]+1)*q[z]}, {p[z], q[z]}, z] but I get a nonsensical answer. Im using Mathematica version 4.2 if that makes a difference. thanks for any help sean URL: ,

 Subject (listing for 'how to solve simulatneous differential equations.') Author Date Posted how to solve simulatneous differential equations. sean 08/19/03 11:39am Re: how to solve simulatneous differential equa... Henry Lamb 08/21/03 01:44am
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