What is {subtopic of} of {potential well}, that has {equation} is {\phi: \nabla\phi = \vec{A}} ?
What is a subtopic of a potential well that has the equation \phi: \nabla\phi = \vec{A}?
SELECT ?answer WHERE { wd:Q761414 wdt:P1269 ?answer . ?answer wdt:P2534 ?x FILTER(contains(?x,'\phi: \nabla\phi = \vec{A}'))}
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q761414> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1269>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?answer. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2534> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <\phi: \nabla\phi = \vec{A}> . }
What could be a subtopic of a potential well that has the condition phi: nablaphi = vec{A}?