Guest juliantrott Posted January 21, 2005 Share Posted January 21, 2005 Hi all - I'm crap at this stuff but I desperately need to solve this one: d^2y/dt^2 = d^2y/dr^2 + (1/r)dy/dr I need to obtain an expression y(t,r). If anyone can help or at least direct me to some easy to follow tutorial you'll make of me a happy man. Peace all J Link to comment Share on other sites More sharing options...
Dave Posted January 21, 2005 Share Posted January 21, 2005 I'm presuming you mean partials instead of d's above, otherwise that wouldn't make much sense Other than that, it's not a very easy equation to solve. It might be possible (I've not done PDEs for a while), but it looks good because the left and right hand sides are independent of each other, so I think you can set the left hand side = right hand side = constant. As I said, I've not done this for a while though and I could be hugely wrong. Also, that doesn't seem to help very much with the RHS, because that's non-linear. woohoo. My 2 cents worth. Link to comment Share on other sites More sharing options...
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