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: "learning nominal automata"
  Abstract: We present an Angluin-style algorithm to learn nominal automata, which are acceptors of languages over infinite (structured) alphabets. The abstract approach we take allows us to seamlessly extend known variations of the algorithm to this new setting. In particular we can learn a subclass of nominal non-deterministic automata. An implementation using a recently developed Haskell library for nominal computation is provided for preliminary experiments.

Connected through hyperedge HE-1 (induced by source paper "a categorical framework for learning generalised tree automata"):
  with members:
    - "learning weighted automata over principal ideal domains"
    - "coalgebra learning via duality"
    - "automata learning an algebraic approach"
    - "calf categorical automata learning framework"
    - "learning automata with side effects"

Connected through hyperedge HE-2 (induced by source paper "automata learning an algebraic approach"):
  with members:
    - "tree automata as algebras minimisation and determinisation"
    - "coalgebra learning via duality"
    - "generic partition refinement and weighted tree automata"
    - "efficient coalgebraic partition refinement"
    - "calf categorical automata learning framework"
    - "learning automata with side effects"
    - "eilenberg theorems for free"
    - "syntactic monoids in a category"

Connected through hyperedge HE-3 (induced by source paper "a co algebraic theory of succinct automata"):
  with members:
    - "optimizing automata learning via monads"
    - "coalgebraic determinization of alternating automata"
    - "recognisable languages over monads"
    - "generalizing determinization from automata to coalgebras"
    - "theory of atomata"

Connected through hyperedge HE-4 (induced by source paper "residual nominal automata"):
  with members:
    - "the containment problem for unambiguous register automata"
    - "smt solving for functional programming over infinite structures"
    - "automata theory in nominal sets"
    - "a robust class of data languages and an application to learning"
    - "runtime verification based on register automata"

Connected through hyperedge HE-5 (induced by source paper "fast computations on ordered nominal sets"):
  with members:
    - "history register automata"
    - "smt solving for functional programming over infinite structures"
    - "automata theory in nominal sets"

Connected through hyperedge HE-6 (induced by source paper "separation and renaming in nominal sets"):
  with members:
    - "coalgebraic trace semantics via forgetful logics"
    - "automata theory in nominal sets"
    - "generalizing determinization from automata to coalgebras"

Connected through hyperedge HE-7 (induced by source paper "learning weighted automata over principal ideal domains"):
  with members:
    - "optimizing automata learning via monads"
    - "learning automata with side effects"
    - "weighted automata in text and speech processing"

Connected through hyperedge HE-8 (induced by source paper "symbolic register automata"):
  with members:
    - "register automata with linear arithmetic"
    - "a polynomial time match test for large classes of extended regular expressions"
    - "relating timed and register automata"
    - "runtime verification based on register automata"
    - "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)