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: "model checking existential logic on partially ordered sets"
  Abstract: We study the problem of checking whether an existential sentence (that is, a first-order sentence in prefix form built using existential quantifiers and all Boolean connectives) is true in a finite partially ordered set (in short, a poset). A poset is a reflexive, antisymmetric, and transitive digraph. The problem encompasses the fundamental embedding problem of finding an isomorphic copy of a poset as an induced substructure of another poset. #R##N#Model checking existential logic is already NP-hard on a fixed poset; thus we investigate structural properties of posets yielding conditions for fixed-parameter tractability when the problem is parameterized by the sentence. We identify width as a central structural property (the width of a poset is the maximum size of a subset of pairwise incomparable elements); our main algorithmic result is that model checking existential logic on classes of finite posets of bounded width is fixed-parameter tractable. We observe a similar phenomenon in classical complexity, where we prove that the isomorphism problem is polynomial-time tractable on classes of posets of bounded width; this settles an open problem in order theory. #R##N#We surround our main algorithmic result with complexity results on less restricted, natural neighboring classes of finite posets, establishing its tightness in this sense. We also relate our work with (and demonstrate its independence of) fundamental fixed-parameter tractability results for model checking on digraphs of bounded degree and bounded clique-width.

Connected through hyperedge HE-1 (induced by source paper "model checking on ordered structures"):
  with members:
    - "order invariance on decomposable structures"
    - "successor invariant first order logic on graphs with excluded topological subgraphs"
    - "lower bounds for approximation schemes for closest string"
    - "deciding first order properties of nowhere dense graphs"
    - "courcelle s theorem a game theoretic approach"
    - "lower bounds for the complexity of monadic second order logic"
    - "deciding first order properties of locally tree decomposable structures"

Connected through hyperedge HE-2 (induced by source paper "a new perspective on fo model checking of dense graph classes"):
  with members:
    - "model checking for successor invariant first order formulas on graph classes of bounded expansion"
    - "fo model checking of interval graphs"
    - "faster existential fo model checking on posets"
    - "deciding first order properties of locally tree decomposable structures"

Connected through hyperedge HE-3 (induced by source paper "fo model checking of geometric graphs"):
  with members:
    - "a new perspective on fo model checking of dense graph classes"
    - "fo model checking of interval graphs"
    - "fo model checking on posets of bounded width"
    - "faster existential fo model checking on posets"
    - "deciding first order properties of nowhere dense graphs"
    - "cleaning interval graphs"
    - "deciding first order properties of locally tree decomposable structures"

Connected through hyperedge HE-4 (induced by source paper "fo model checking on posets of bounded width"):
  with members:
    - "faster existential fo model checking on posets"
    - "deciding first order properties of locally tree decomposable structures"

Connected through hyperedge HE-5 (induced by source paper "quantified conjunctive queries on partially ordered sets"):
  with members:
    - "fo model checking on posets of bounded width"
    - "faster existential fo model checking on posets"
    - "deciding first order properties of nowhere dense graphs"

Connected through hyperedge HE-6 (induced by source paper "faster existential fo model checking on posets"):
  with members:
    - "deciding first order properties of nowhere dense graphs"
    - "solving max r sat above a tight lower bound"

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)