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 "abelian square rich words"):
  Abstract: Abstract   An abelian square is the concatenation of two words that are anagrams of one another. A word of length  n  can contain at most    Θ  (    n    2    )    distinct factors, and there exist words of length  n  containing    Θ  (    n    2    )    distinct abelian-square factors, that is, distinct factors that are abelian squares. This motivates us to study infinite words such that the number of distinct abelian-square factors of length  n  grows quadratically with  n . More precisely, we say that an infinite word  w  is  abelian-square-rich  if, for every  n , every factor of  w  of length  n  contains, on average, a number of distinct abelian-square factors that is quadratic in  n ; and  uniformly abelian-square-rich  if every factor of  w  contains a number of distinct abelian-square factors that is proportional to the square of its length. Of course, if a word is uniformly abelian-square-rich, then it is abelian-square-rich, but we show that the converse is not true in general. We prove that the Thue–Morse word is uniformly abelian-square-rich and that the function counting the number of distinct abelian-square factors of length 2 n  of the Thue–Morse word is 2-regular. As for Sturmian words, we prove that a Sturmian word      s    α      of angle  α  is uniformly abelian-square-rich if and only if the irrational  α  has bounded partial quotients, that is, if and only if      s    α      has bounded exponent.

Includes members:
  Member "maximum number of distinct and nonequivalent nonstandard squares in a word":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "ten conferences words open problems and conjectures")
  Member "words with the maximum number of abelian squares":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "maximum number of distinct and nonequivalent nonstandard squares in a word")
  Member "cyclic complexity of words":
    also connected through other hyperedges:
      (none)
  Member "decision algorithms for fibonacci automatic words with applications to pattern avoidance":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "a note on the avoidability of binary patterns with variables and reversals")
  Member "on the number of unbordered factors":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "sums of palindromes an approach via automata")
  Member "abelian repetitions in sturmian words":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "maximum number of distinct and nonequivalent nonstandard squares in a word")
  Member "enumeration and decidable properties of automatic sequences":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "minimal automaton for multiplying and translating the thue morse set")
  Member "periodicity repetitions and orbits of an automatic sequence":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "minimal automaton for multiplying and translating the thue morse set")

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.DM(Discrete Mathematics)