Question

can any body help me in finding notes on PDEs to convert 2nd order into first order PDEs?

Answer 1

Usually you just write v = y' (Equation 1) so that v' = y'' and rewrite the original equation (Equation 2)

Answer 2

you means to say that using the concept of separation of variables?

Answer 3

Not really, I mean just what I said...

It would be easier to discuss this if you had a specific example.

Answer 4

\[u _{t}=c ^{2}u _{xx}\]