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: "on nfas where all states are final initial or both"
  Abstract: We examine questions involving nondeterministic finite automata where all states are final, initial, or both initial and final. First, we prove hardness results for the nonuniversality and inequivalence problems for these NFAs. Next, we characterize the languages accepted. Finally, we discuss some state complexity problems involving such automata.

Connected through hyperedge HE-1 (induced by source paper "on the state complexity of closures and interiors of regular languages with subwords and superwords"):
  with members:
    - "decidability in the logic of subsequences and supersequences"
    - "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"

Connected through hyperedge HE-2 (induced by source paper "operations on automata with all states final"):
  with members:
    - "quotient complexity of ideal languages"
    - "quotient complexity of closed languages"
    - "the state complexity of l 2 and l k"

Connected through hyperedge HE-3 (induced by source paper "syntactic complexity of ideal and closed languages"):
  with members:
    - "quotient complexity of ideal languages"
    - "quotient complexity of closed languages"
    - "decision problems for convex languages"
    - "quotient complexity of regular languages"

Connected through hyperedge HE-4 (induced by source paper "quotient complexity of closed languages"):
  with members:
    - "closures in formal languages and kuratowski s theorem"
    - "quotient complexity of ideal languages"
    - "decision problems for convex languages"
    - "quotient complexity of regular languages"

Connected through hyperedge HE-5 (induced by source paper "the computational complexity of universality problems for prefixes suffixes factors and subwords of regular languages"):
  with members:
    - "on non complete sets and restivo s conjecture"
    - "the frobenius problem in a free monoid"

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.CC(Computational Complexity)