human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "syntactic complexity of bifix free languages"):
  Abstract: We study the properties of syntactic monoids of bifix-free regular languages. In particular, we solve an open problem concerning syntactic complexity: We prove that the cardinality of the syntactic semigroup of a bifix-free language with state complexity $n$ is at most $(n-1)^{n-3}+(n-2)^{n-3}+(n-3)2^{n-3}$ for $n\ge 6$. The main proof uses a large construction with the method of injective function. Since this bound is known to be reachable, and the values for $n \le 5$ are known, this completely settles the problem. We also prove that $(n-2)^{n-3} + (n-3)2^{n-3} - 1$ is the minimal size of the alphabet required to meet the bound for $n \ge 6$. Finally, we show that the largest transition semigroups of minimal DFAs which recognize bifix-free languages are unique up to renaming the states.

Includes members:
  Member "on nonpermutational transformation semigroups with an application to syntactic complexity":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "checking whether an automaton is monotonic is np complete")
  Member "upper bounds on syntactic complexity of left and two sided ideals":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "towards a theory of complexity of regular languages")
  Member "large aperiodic semigroups":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "most complex deterministic union free regular languages")
  Member "syntactic complexity of prefix suffix bifix and factor free regular languages":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "complexity of suffix free regular languages")
  Member "theory of atomata":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "a co algebraic theory of succinct automata")
  Member "syntactic complexity of ideal and closed languages":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "towards a theory of complexity of regular languages")
  Member "quotient complexity of regular languages":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "complexity of the frobenius monoid problem for a finite language")

Question: Please tell me which class the source paper 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)