PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In calculus of variations, the Euler???Lagrange equation, or Lagrange's equation, is a differential equation whose solutions are the functions for which a given functional is stationary.
http://www.w3.org/ns/prov#wasQuotedFrom
  • exampleproblems.com