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 "prefix palindromic length of the thue morse word"):
  Abstract: The prefix palindromic length $PPL_u(n)$ of an infinite word $u$ is the minimal number of palindromes to which the prefix of length $n$ of $u$ can be decomposed. In a 2013 paper with Puzynina and Zamboni we stated the conjecture that $PPL_u(n)$ is unbounded for every infinite word $u$ which is not ultimately periodic. Up to now, the conjecture has been proved only for some particular cases, including all words avoiding some power $k$. However, even in that case the existing upper bound for the minimal number $n$ such that $PPL_u(n)>K$ is greater than any constant to the power $K$. Precise values of $PPL_u(n)$ are not known even for simplest examples like the Fibonacci word. #R##N#In this paper, we give a first example of such a precise computation and compute the function of the prefix palindromic length of the Thue-Morse word, a famous test object for all functions on infinite words. It happens that the sequence $(PPL_t(n))$ is $2$-regular, which raises the question if it is the case for all automatic sequences.

Includes members:
  Member "sturmian numeration systems and decompositions to palindromes":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "palindromic k factorization in pure linear time")
  Member "eertree an efficient data structure for processing palindromes in strings":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "palindromic k factorization in pure linear time")
  Member "a subquadratic algorithm for minimum palindromic factorization":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "palindromic k factorization in pure linear time")
  Member "enumeration and decidable properties of automatic sequences":
    also connected through other hyperedges:
      - Hyperedge HE-4 (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)