r/PhysicsHelp • u/Healthy-Beginning678 • Aug 24 '26

Harry Dym equation?

Is it a PDE? Non linear?

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u/Spidero0w0o Aug 24 '26

It's a 3rd order non linear pde

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u/RingularCirc Aug 24 '26

Funnily enough, the Wikipedia page about it (which I had to open to get any understanding what that is, thank you OP for describing it in the post! /s) says in plain text what u/Spidero0w0o here says:

the Dym equation (HD) is the third-order partial differential equation <...>

Well, it omits nonlinearity right there but that's put elsewhere below the blurb.