Solving u_tt = u_xx + u_xxxx

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Mugged
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anyone have any ideas on a technique to tackle this PDE:

[itex]u_{tt}[/itex] = [itex]u_{xx}[/itex] + [itex]u_{xxxx}[/itex]

its like a 4th order wave equation

any help or references would be appreciated
 

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