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: "decidability of higher order matching"
  Abstract: We show that the higher-order matching problem is decidable using a game- theoretic argument.

Connected through hyperedge HE-1 (induced by source paper "termination of rewrite relations on λ terms based on girard s notion of reducibility"):
  with members:
    - "higher order dependency pairs"
    - "the computability path ordering"
    - "polynomial interpretations for higher order rewriting"
    - "static dependency pair method based on strong computability for higher order rewrite systems"
    - "neighbourhood structures bisimilarity and basic model theory"
    - "on the relation between size based termination and semantic labelling"
    - "the computability path ordering the end of a quest"
    - "short proofs of strong normalization"

Connected through hyperedge HE-2 (induced by source paper "bpa bisimilarity is exptime hard"):
  with members:
    - "bisimilarity on basic process algebra is in 2 exptime an explicit proof"
    - "beyond language equivalence on visibly pushdown automata"
    - "model checking probabilistic timed automata with one or two clocks"
    - "equivalence checking on infinite state systems techniques and results"
    - "the bisimulation problem for equational graphs of finite out degree"

Connected through hyperedge HE-3 (induced by source paper "typed answer set programming and inverse lambda algorithms"):
  with members:
    - "learning to map sentences to logical form structured classification with probabilistic categorial grammars"
    - "solving puzzles described in english by automated translation to answer set programming and learning how to do that translation"

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)