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: "relating timed and register automata"
  Abstract: Timed automata and register automata are well-known models of computation over timed and data words respectively. The former has clocks that allow to test the lapse of time between two events, whilst the latter includes registers that may store data values for later comparison. Although these two models behave in appearance differently, several decision problems have the same (un)decidability and complexity results for both models. As a prominent example, emptiness is decidable for alternating automata with one clock or register, both with non-primitive recursive complexity. This is not by chance. This work confirms that there is indeed a tight relationship between the two models. We show that a run of a timed automaton can be simulated by a register automaton, and conversely that a run of a register automaton can be simulated by a timed automaton. Our results allow to transfer complexity and decidability results back and forth between these two kinds of models. We justify the usefulness of these reductions by obtaining new results on register automata.

Connected through hyperedge HE-1 (induced by source paper "symbolic register automata"):
  with members:
    - "register automata with linear arithmetic"
    - "learning nominal automata"
    - "a polynomial time match test for large classes of extended regular expressions"
    - "runtime verification based on register automata"
    - "ltl with the freeze quantifier and register automata"

Connected through hyperedge HE-2 (induced by source paper "register automata with linear arithmetic"):
  with members:
    - "the commutativity problem of the mapreduce framework a transducer based approach"
    - "integer vector addition systems with states"
    - "ltl with the freeze quantifier and register automata"

Connected through hyperedge HE-3 (induced by source paper "complexity hierarchies beyond elementary"):
  with members:
    - "demystifying reachability in vector addition systems"
    - "nonelementary complexities for branching vass mell and extensions"
    - "on freeze ltl with ordered attributes"
    - "trace inclusion for one counter nets revisited"
    - "the power of priority channel systems"
    - "the parametric ordinal recursive complexity of post embedding problems"
    - "graph logics with rational relations"
    - "senescent ground tree rewrite systems"

Connected through hyperedge HE-4 (induced by source paper "automata theory in nominal sets"):
  with members:
    - "ltl with the freeze quantifier and register automata"

Connected through hyperedge HE-5 (induced by source paper "a finite exact representation of register automata configurations"):
  with members:
    - "ltl with the freeze quantifier and register automata"

Connected through hyperedge HE-6 (induced by source paper "alternating register automata on finite words and trees"):
  with members:
    - "bottom up automata on data trees and vertical xpath"
    - "ackermannian and primitive recursive bounds with dickson s lemma"
    - "alternating automata on data trees and xpath satisfiability"
    - "ltl with the freeze quantifier and register automata"
    - "on the freeze quantifier in constraint ltl decidability and complexity"

Connected through hyperedge HE-7 (induced by source paper "an automaton over data words that captures emso logic"):
  with members:
    - "an extension of data automata that captures xpath"
    - "an optimal construction of hanf sentences"
    - "temporal logics on words with multiple data values"
    - "ltl with the freeze quantifier and register 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.FL(Formal Languages and Automata Theory)