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: "maximum number of distinct and nonequivalent nonstandard squares in a word"
  Abstract: The combinatorics of squares in a word depends on how the equivalence of halves of the square is defined. We consider Abelian squares, parameterized squares, and order-preserving squares. The word $uv$ is an Abelian (parameterized, order-preserving) square if $u$ and $v$ are equivalent in the Abelian (parameterized, order-preserving) sense. The maximum number of ordinary squares in a word is known to be asymptotically linear, but the exact bound is still investigated. We present several results on the maximum number of distinct squares for nonstandard subword equivalence relations. Let $\mathit{SQ}_{\mathrm{Abel}}(n,\sigma)$ and $\mathit{SQ}'_{\mathrm{Abel}}(n,\sigma)$ denote the maximum number of Abelian squares in a word of length $n$ over an alphabet of size $\sigma$, which are distinct as words and which are nonequivalent in the Abelian sense, respectively. For $\sigma\ge 2$ we prove that $\mathit{SQ}_{\mathrm{Abel}}(n,\sigma)=\Theta(n^2)$, $\mathit{SQ}'_{\mathrm{Abel}}(n,\sigma)=\Omega(n^{3/2})$ and $\mathit{SQ}'_{\mathrm{Abel}}(n,\sigma) = O(n^{11/6})$. We also give linear bounds for parameterized and order-preserving squares for alphabets of constant size: $\mathit{SQ}_{\mathrm{param}}(n,O(1))=\Theta(n)$, $\mathit{SQ}_{\mathrm{op}}(n,O(1))=\Theta(n)$. The upper bounds have quadratic dependence on the alphabet size for order-preserving squares and exponential dependence for parameterized squares. #R##N#As a side result we construct infinite words over the smallest alphabet which avoid nontrivial order-preserving squares and nontrivial parameterized cubes (nontrivial parameterized squares cannot be avoided in an infinite word).

Connected through hyperedge HE-1 (induced by source paper "abelian square rich words"):
  with members:
    - "words with the maximum number of abelian squares"
    - "cyclic complexity of words"
    - "decision algorithms for fibonacci automatic words with applications to pattern avoidance"
    - "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 "ten conferences words open problems and conjectures"):
  with members:
    - "balance properties of arnoux rauzy words"
    - "avoiding three consecutive blocks of the same size and same sum"

Connected through hyperedge HE-3 (induced by source paper "words with the maximum number of abelian squares"):
  with members:
    - "abelian repetitions in sturmian words"

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.DM(Discrete Mathematics)