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: "lyndon words and short superstrings"
  Abstract: In the Shortest-Superstring problem, we are given a set of strings S and want to ?find a string that contains all strings in S as substrings and has minimum length. This is a classical problem in approximation and the best known approximation factor is 2 1/2, given by Sweedyk in 1999. Since then no improvement has been made, howerever two other approaches yielding a 2 1/2-approximation algorithms have been proposed by Kaplan et al. and recently by Paluch et al., both based on a reduction to maximum asymmetric TSP path (Max-ATSP-Path) and structural results of Breslauer et al. #R##N#In this paper we give an algorithm that achieves an approximation ratio of 2 11/23, breaking through the long-standing bound of 2 1/2. #R##N#We use the standard reduction of Shortest-Superstring to Max-ATSP-Path. The new, somewhat surprising, algorithmic idea is to take the better of the two solutions obtained by using: (a) the currently best 2/3-approximation algorithm for Max-ATSP-Path and (b) a naive cycle-cover based 1/2-approximation algorithm. To prove that this indeed results in an improvement, we further develop a theory of string overlaps, extending the results of Breslauer et al. This theory is based on the novel use of Lyndon words, as a substitute for generic unbordered rotations and critical factorizations, as used by Breslauer et al.

Connected through hyperedge HE-1 (induced by source paper "lyndon words versus inverse lyndon words queries on suffixes and bordered words"):
  with members:
    - "some variations on lyndon words"
    - "inverse lyndon words and inverse lyndon factorizations of words"
    - "on generalized lyndon words"
    - "the runs theorem"
    - "fsg fast string graph construction for de novo assembly of reads data"
    - "on the size of lempel ziv and lyndon factorizations"
    - "an external memory algorithm for string graph construction"
    - "alternative algorithms for lyndon factorization"

Connected through hyperedge HE-2 (induced by source paper "inverse lyndon words and inverse lyndon factorizations of words"):
  with members:
    - "on the size of lempel ziv and lyndon factorizations"
    - "alternative algorithms for lyndon factorization"
    - "sorting suffixes of a text via its lyndon factorization"
    - "a bijective string sorting transform"
    - "on bijective variants of the burrows wheeler transform"
    - "a note on the burrows wheeler transformation"

Connected through hyperedge HE-3 (induced by source paper "collapsing superstring conjecture"):
  with members:
    - "hierarchical overlap graph"
    - "a constant factor approximation algorithm for the asymmetric traveling salesman problem"
    - "better approximation algorithms for maximum asymmetric traveling salesman and shortest superstring"

Connected through hyperedge HE-4 (induced by source paper "on improving the approximation ratio of the r shortest common superstring problem"):
  with members:
    - "on the greedy algorithm for the shortest common superstring problem with reversals"
    - "approximation hardness of shortest common superstring variants"
    - "better approximation algorithms for maximum asymmetric traveling salesman and shortest superstring"

Connected through hyperedge HE-5 (induced by source paper "the runs theorem"):
  with members:
    - "computing runs on a general alphabet"
    - "internal pattern matching queries in a text and applications"
    - "on the maximal sum of exponents of runs in a string"
    - "on bijective variants of the burrows wheeler transform"
    - "new lower bounds for the maximum number of runs in a string"
    - "circle formation of weak robots and lyndon words"

Connected through hyperedge HE-6 (induced by source paper "greedy shortest common superstring approximation in compact space"):
  with members:
    - "better approximation algorithms for maximum asymmetric traveling salesman and shortest superstring"
    - "linear time construction of compressed text indices in compact space"
    - "from theory to practice plug and play with succinct data structures"

Connected through hyperedge HE-7 (induced by source paper "minimal suffix and rotation of a substring in optimal time"):
  with members:
    - "optimal searching of gapped repeats in a word"
    - "dynamic integer sets with optimal rank select and predecessor search"

Connected through hyperedge HE-8 (induced by source paper "a note on the shortest common superstring of ngs reads"):
  with members:
    - "on the greedy algorithm for the shortest common superstring problem with reversals"
    - "approximation hardness of shortest common superstring variants"

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.DS(Data Structures and Algorithms)