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 in the logic of subsequences and supersequences"
  Abstract: We consider first-order logics of sequences ordered by the subsequence ordering, aka sequence embedding. We show that the Sigma_2 theory is undecidable, answering a question left open by Kuske. Regarding fragments with a bounded number of variables, we show that the FO^2 theory is decidable while the FO^3 theory is undecidable.

Connected through hyperedge HE-1 (induced by source paper "languages ordered by the subword order"):
  with members:
    - "defining recursive predicates in graph orders"
    - "decidability complexity and expressiveness of first order logic over the subword ordering"
    - "the height of piecewise testable languages with applications in logical complexity"
    - "arithmetic first order logic and counting quantifiers"

Connected through hyperedge HE-2 (induced by source paper "well quasiorders and hierarchy theory"):
  with members:
    - "on the state complexity of closures and interiors of regular languages with subwords and superwords"
    - "generalized post embedding problems"
    - "the height of piecewise testable languages with applications in logical complexity"
    - "fragments of first order logic over infinite words"

Connected through hyperedge HE-3 (induced by source paper "decidability complexity and expressiveness of first order logic over the subword ordering"):
  with members:
    - "on the state complexity of closures and interiors of regular languages with subwords and superwords"
    - "generalized post embedding problems"
    - "the height of piecewise testable languages with applications in logical complexity"
    - "subclasses of presburger arithmetic and the weak exp hierarchy"
    - "the power of priority channel systems"
    - "recompression a simple and powerful technique for word equations"

Connected through hyperedge HE-4 (induced by source paper "defining recursive predicates in graph orders"):
  with members:
    - "decidability complexity and expressiveness of first order logic over the subword ordering"

Connected through hyperedge HE-5 (induced by source paper "on the state complexity of closures and interiors of regular languages with subwords and superwords"):
  with members:
    - "refinement and difference for probabilistic automata"
    - "finite automata for the sub and superword closure of cfls descriptional and computational complexity"
    - "alternating towers and piecewise testable separators"
    - "the power of priority channel systems"
    - "computing downward closures for stacked counter automata"
    - "quotient complexity of ideal languages"
    - "decision problems for convex languages"
    - "the computational complexity of universality problems for prefixes suffixes factors and subwords of regular languages"

Connected through hyperedge HE-6 (induced by source paper "the height of piecewise testable languages and the complexity of the logic of subwords"):
  with members:
    - "piecewise testable languages and nondeterministic automata"
    - "on the state complexity of closures and interiors of regular languages with subwords and superwords"
    - "on the index of simon s congruence for piecewise testability"
    - "an approach to computing downward closures"
    - "the height of piecewise testable languages with applications in logical complexity"
    - "finite automata for the sub and superword closure of cfls descriptional and computational complexity"
    - "recompression a simple and powerful technique for word equations"
    - "piecewise testable tree languages"

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)