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 regular ideals"):
  Abstract: The state complexity of a regular language is the number of states in a minimal deterministic finite automaton accepting the language. The syntactic complexity of a regular language is the cardinality of its syntactic semigroup. The syntactic complexity of a subclass of regular languages is the worst-case syntactic complexity taken as a function of the state complexity $n$ of languages in that class. We prove that $n^{n-1}$, $n^{n-1}+n-1$, and $n^{n-2}+(n-2)2^{n-2}+1$ are tight upper bounds on the syntactic complexities of right ideals and prefix-closed languages, left ideals and suffix-closed languages, and two-sided ideals and factor-closed languages, respectively. Moreover, we show that the transition semigroups meeting the upper bounds for all three types of ideals are unique, and the numbers of generators (4, 5, and 6, respectively) cannot be reduced.

Includes members:
  Member "syntactic complexity of bifix free languages":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "complexity of suffix free regular languages")
  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 "syntactic complexity of bifix free 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 ideal languages":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "primitivity uniform minimality and state complexity of boolean operations")
  Member "quotient complexity of closed languages":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "towards a theory of complexity of regular languages")

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)