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: "multi head finite automata characterizations concepts and open problems"
  Abstract: Multi-head finite automata were introduced in (Rabin, 1964) and (Rosenberg, 1966). Since that time, a vast literature on computational and descriptional complexity issues on multi-head finite automata documenting the importance of these devices has been developed. Although multi-head finite automata are a simple concept, their computational behavior can be already very complex and leads to undecidable or even non-semi-decidable problems on these devices such as, for example, emptiness, finiteness, universality, equivalence, etc. These strong negative results trigger the study of subclasses and alternative characterizations of multi-head finite automata for a better understanding of the nature of non-recursive trade-offs and, thus, the borderline between decidable and undecidable problems. In the present paper, we tour a fragment of this literature.

Connected through hyperedge HE-1 (induced by source paper "structural complexity of multi valued partial functions computed by nondeterministic pushdown automata"):
  with members:
    - "oracle pushdown automata nondeterministic reducibilities and the cfl hierarchy over the family of context free languages"
    - "immunity and pseudorandomness of context free languages"
    - "the roles of advice to one tape linear time turing machines and finite automata"
    - "pseudorandom generators against advised context free languages"
    - "swapping lemmas for regular and context free languages"
    - "theory of one tape linear time turing machines"

Connected through hyperedge HE-2 (induced by source paper "an in between implicit and explicit complexity automata"):
  with members:
    - "characterizing co nl by a group action"
    - "memoization for unary logic programming characterizing ptime"
    - "logic programming and logarithmic space"
    - "logarithmic space and permutations"

Connected through hyperedge HE-3 (induced by source paper "logic programming and logarithmic space"):
  with members:
    - "characterizing co nl by a group action"
    - "unification and logarithmic space"
    - "interaction graphs multiplicatives"
    - "two way finite automata old and recent results"
    - "linear logic by levels and bounded time complexity"
    - "an implicit characterization of pspace"
    - "bounded linear logic revisited"

Connected through hyperedge HE-4 (induced by source paper "logarithmic space and permutations"):
  with members:
    - "characterizing co nl by a group action"
    - "interaction graphs multiplicatives"
    - "sublogarithmic uniform boolean proof nets"
    - "interaction graphs additives"

Connected through hyperedge HE-5 (induced by source paper "asynchronous multi tape automata intersection undecidability and approximation"):
  with members:
    - "a survey of multi tape automata"
    - "a perfect model for bounded verification"
    - "what s decidable about sequences"
    - "algorithms for weighted multi tape automata"

Connected through hyperedge HE-6 (induced by source paper "a survey of multi tape automata"):
  with members:
    - "algorithms for weighted multi tape automata"

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)