human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "recursion schemes the mso logic and the u quantifier"):
  Abstract: We study the model-checking problem for recursion schemes: does the tree generated by a given higher-order recursion scheme satisfy a given logical sentence. The problem is known to be decidable for sentences of the MSO logic. We prove decidability for an extension of MSO in which we additionally have an unbounding quantifier U, saying that a subformula is true for arbitrarily large finite sets. This quantifier can be used only for subformulae in which all free variables represent finite sets (while an unrestricted use of the quantifier leads to undecidability). We also show that the logic has the properties of reflection and effective selection for trees generated by recursion schemes.

Includes members:
  Member "the diagonal problem for higher order recursion schemes is decidable":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "intersection types for unboundedness problems")
  Member "unboundedness and downward closures of higher order pushdown automata":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "regular separability and intersection emptiness are independent problems")
  Member "ordered tree pushdown systems":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "intersection types for unboundedness problems")
  Member "an approach to computing downward closures":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "reachability in vector addition systems is primitive recursive in fixed dimension")
  Member "using models to model check recursive schemes":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "around finite second order coherence spaces")
  Member "weak mso u with path quantifiers over infinite trees":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "parameterized linear temporal logics meet costs still not costlier than ltl")
  Member "io vs oi in higher order recursion schemes":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "using models to model check recursive schemes")
  Member "weak mso with the unbounding quantifier":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "finite state strategies in delay games")

Question: Please tell me which class the source paper 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)