When solving a pde using this method how do you know what ORDER to use the initial/boundary conditions given to you?(adsbygoogle = window.adsbygoogle || []).push({});

E.g. if you are asked to solve the wave equation given u(x,0), u'(x,0), u(0,t), u(l,t) how do you know what order to use these in (particularly the first two)

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# Separation of variables

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