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 "the ideal approach to computing closed subsets in well quasi orderings"):
  Abstract: Elegant and general algorithms for handling upwards-closed and downwards-closed subsets of WQOs can be developed using the filter-based and ideal-based representation for these sets. These algorithms can be built in a generic or parameterized way, in parallel with the way complex WQOs are obtained by combining or modifying simpler WQOs.

Includes members:
  Member "mixed powerdomains for probability and nondeterminism":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "on the linear structure of cones")
  Member "well behaved transition systems":
    also connected through other hyperedges:
      (none)
  Member "complexity hierarchies beyond elementary":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "when symmetries are not enough a hierarchy of hard constraint satisfaction problems")
  Member "demystifying reachability in vector addition systems":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "reachability in vector addition systems is primitive recursive in fixed dimension")
  Member "finite automata for the sub and superword closure of cfls descriptional and computational complexity":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "on the upward downward closures of petri nets")
  Member "the power of priority channel systems":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on functions weakly computable by pushdown petri nets and related systems")
  Member "complexity bounds for ordinal based termination":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "reachability is tower complete")
  Member "computing downward closures for stacked counter automata":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "ptl separability and closures for wqos on words")

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)