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: "decision algorithms for fibonacci automatic words with applications to pattern avoidance"
  Abstract: We implement a decision procedure for answering questions about a class of infinite words that might be called (for lack of a better name) "Fibonacci-automatic". This class includes, for example, the famous Fibonacci word f = 01001010..., the fixed point of the morphism 0 -> 01 and 1 -> 0. We then recover many results about the Fibonacci word from the literature (and improve some of them), such as assertions about the occurrences in f of squares, cubes, palindromes, and so forth. As an application of our method we prove a new result: there exists an aperiodic infinite binary word avoiding the pattern x x x^R. This is the first avoidability result concerning a nonuniform morphism proven purely mechanically.

Connected through hyperedge HE-1 (induced by source paper "abelian square rich words"):
  with members:
    - "maximum number of distinct and nonequivalent nonstandard squares in a word"
    - "words with the maximum number of abelian squares"
    - "cyclic complexity of words"
    - "on the number of unbordered factors"
    - "abelian repetitions in sturmian words"
    - "enumeration and decidable properties of automatic sequences"
    - "periodicity repetitions and orbits of an automatic sequence"

Connected through hyperedge HE-2 (induced by source paper "a note on the avoidability of binary patterns with variables and reversals"):
  with members:
    - "growth rate of binary words avoiding xxx r"
    - "binary patterns in binary cube free words avoidability and growth"

Connected through hyperedge HE-3 (induced by source paper "mechanical proofs of properties of the tribonacci word"):
  with members:
    - "on the number of unbordered factors"
    - "primitive words and lyndon words in automatic and linearly recurrent sequences"
    - "subword complexity and k synchronization"
    - "enumeration and decidable properties of automatic sequences"
    - "periodicity repetitions and orbits of an automatic sequence"

Connected through hyperedge HE-4 (induced by source paper "deciding game invariance"):
  with members:
    - "automatic theorem proving in walnut"
    - "mechanical proofs of properties of the tribonacci word"
    - "from heaps of matches to the limits of computability"

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)