{ "items" : [
    { "id" : "http://dbpedia.org/resource/Matrix_calculus"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In mathematics, matrix calculus is a specialized notation for doing multivariable calculus, especially over spaces of matrices.  It collects the various partial derivatives of a single function with respect to many variables, and/or of a multivariate function with respect to a single variable, into vectors and matrices that can be treated as single entities."] } } }
