Cnoidal waveEdit

Sorry but this maybe not limited to a gravity wave as you said but it is induced in reaction to gravity like any water waves, so it is a gravity wave, too :

Gravity waves are waves generated in a fluid medium or at the interface between two media when the force of gravity or buoyancy is present

. Why removed Category:Gravity waves instead of just added back up Category:Water waves even if it is redundant as that category should be in Gravity waves?

Pierre cb (talk) 20:57, 5 May 2020 (UTC)

Dear Pierre cb, thanks for your question. As you probably know: the effect of gravity as a restoring force is negligible for very short water waves (capillary waves) on the water surface. In capillary waves it is surface tension that provides the restoring force, not gravity. There are cnoidal-wave models for capillary waves in shallow water. So to my opinion the category "gravity waves" is too limited in scope. Best regards, Crowsnest (talk) 13:25, 9 May 2020 (UTC)