About: http://dbpedia.org/resource/Luke's_variational

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dbo:description	action describing surface waves on a fluid with a free surface under the action of gravity (en)
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dct:subject	dbc:Fluid_dynamics
gold:hypernym	dbr:Description
rdfs:label	Luke's variational principle (en)
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About: http://dbpedia.org/resource/Luke's_variational_principle