human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "correctness and completeness of logic programs"
  Abstract: We discuss proving correctness and completeness of definite clause logic programs. We propose a method for proving completeness, while for proving correctness we employ a method that should be well known but is often neglected. Also, we show how to prove completeness and correctness in the presence of SLD-tree pruning, and point out that approximate specifications simplify specifications and proofs.   We compare the proof methods to declarative diagnosis (algorithmic debugging), showing that approximate specifications eliminate a major drawback of the latter. We argue that our proof methods reflect natural declarative thinking about programs, and that they can be used, formally or informally, in everyday programming.

Connected through hyperedge HE-1 (induced by source paper "the prolog debugger and declarative programming examples"):
  with members:
    - "the prolog debugger and declarative programming"

Connected through hyperedge HE-2 (induced by source paper "on correctness of an n queens program"):
  with members:
    - "logic control on program construction and verification"
    - "proving correctness and completeness of normal programs a declarative approach"

Connected through hyperedge HE-3 (induced by source paper "the prolog debugger and declarative programming"):
  with members:
    - "proving completeness of logic programs with the cut"
    - "logic control on program construction and verification"

Connected through hyperedge HE-4 (induced by source paper "proving completeness of logic programs with the cut"):
  with members:
    - "on definite program answers and least herbrand models"
    - "on completeness of logic programs"
    - "automated termination analysis for logic programs with cut"
    - "proving correctness and completeness of normal programs a declarative approach"
    - "the witness properties and the semantics of the prolog cut"

Connected through hyperedge HE-5 (induced by source paper "on definite program answers and least herbrand models"):
  with members:
    - "transforming floundering into success"
    - "a three valued semantics for logic programmers"

Connected through hyperedge HE-6 (induced by source paper "on completeness of logic programs"):
  with members:
    - "logic control an example of program construction"
    - "proving correctness and completeness of normal programs a declarative approach"

Connected through hyperedge HE-7 (induced by source paper "logic control on program construction and verification"):
  with members:
    - "proving completeness of logic programs with the cut"
    - "on definite program answers and least herbrand models"
    - "on completeness of logic programs"
    - "sicstus prolog the first 25 years"
    - "polytool polynomial interpretations as a basis for termination analysis of logic programs"
    - "proving correctness and completeness of normal programs a declarative approach"
    - "classes of terminating logic programs"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.LO(Logic in Computer Science)