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 nonpermutational transformation semigroups with an application to syntactic complexity"
  Abstract: We give an upper bound of $n((n-1)!-(n-3)!)$ for the possible largest size of a subsemigroup of the full transformational semigroup over $n$ elements consisting only of nonpermutational transformations. As an application we gain the same upper bound for the syntactic complexity of (generalized) definite languages as well.

Connected through hyperedge HE-1 (induced by source paper "syntactic complexity of bifix free languages"):
  with members:
    - "upper bounds on syntactic complexity of left and two sided ideals"
    - "large aperiodic semigroups"
    - "syntactic complexity of prefix suffix bifix and factor free regular languages"
    - "theory of atomata"
    - "syntactic complexity of ideal and closed languages"
    - "quotient complexity of regular languages"

Connected through hyperedge HE-2 (induced by source paper "checking whether an automaton is monotonic is np complete"):
  with members:
    - "synchronizing automata with large reset lengths"
    - "large aperiodic semigroups"
    - "experimental study of the shortest reset word of random automata"
    - "the complexity of finding reset words in finite automata"
    - "approximating the minimum length of synchronizing words is hard"
    - "decision problems for convex languages"

Connected through hyperedge HE-3 (induced by source paper "large aperiodic semigroups"):
  with members:
    - "quotient complexity of star free languages"
    - "quotient complexity of ideal languages"
    - "quotient complexity of regular languages"

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)