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: "antichains for the automata based approach to model checking"
  Abstract: We propose and evaluate antichain algorithms to solve the universality and language inclusion problems for nondeterministic Buchi automata, and the emptiness problem for alternating Buchi automata. To obtain those algorithms, we establish the existence of simulation pre-orders that can be exploited to efficiently evaluate fixed points on the automata defined during the complementation step (that we keep implicit in our approach). We evaluate the performance of the algorithm to check the universality of Buchi automata using the random automaton model recently proposed by Tabakov and Vardi. We show that on the difficult instances of this probabilistic model, our algorithm outperforms the standard ones by several orders of magnitude.

Connected through hyperedge HE-1 (induced by source paper "looking at mean payoff through foggy windows"):
  with members:
    - "looking at mean payoff and total payoff through windows"
    - "alpaga a tool for solving parity games with imperfect information"
    - "algorithms for omega regular games with imperfect information"

Connected through hyperedge HE-2 (induced by source paper "state of buchi complementation"):
  with members:
    - "buchi complementation and size change termination"
    - "b uchi complementation made tight"
    - "enriched mu calculi module checking"
    - "lower bounds for complementation of omega automata via the full automata technique"
    - "from nondeterministic b uchi and streett automata to deterministic parity automata"
    - "decisive markov chains"

Connected through hyperedge HE-3 (induced by source paper "buffered simulation games for buchi automata"):
  with members:
    - "advanced automata minimization"
    - "degrees of lookahead in regular infinite games"
    - "buchi complementation and size change termination"

Connected through hyperedge HE-4 (induced by source paper "buchi complementation and size change termination"):
  with members:
    - "sat based termination analysis using monotonicity constraints over the integers"
    - "size change termination monotonicity constraints and ranking functions"
    - "b uchi complementation made tight"

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)