{ "items" : [
    { "id" : "http://dbpedia.org/resource/Abel's_summation_formula"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In mathematics, Abel's summation formula, introduced by Niels Henrik Abel, is intensively used in number theory to compute series."] } } }
