{ "items" : [
    { "id" : "http://dbpedia.org/resource/Potential_theory"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In mathematics and mathematical physics, potential theory is the study of harmonic functions.The term \"potential theory\" was coined in 19th-century physics, when it was realized that the fundamental forces of nature could be modeled using potentials which satisfy Laplace's equation."] } } }
