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: "towards faster isomorphism tests for bounded degree graphs"
  Abstract: Luks' algorithm (JCSS 1982) to test isomorphism of bounded degree graphs in polynomial time is one of most important results in the context of the Graph Isomorphism Problem and has been repeatedly used as a basic building block for many other algorithms. In the light of Babai's (STOC 2016) quasipolynomial time algorithm for general isomorphism testing we investigate the question whether the techniques developed for this new algorithm can adapted to the bounded degree setting. #R##N#More precisely, we ask the question whether there is an $n^{\text{polylog}(d)}$-isomorphism test for graphs of maximum degree $d$. While we cannot answer this questions yet, we prove that there is an $n^{\text{polylog}(d)}$-isomorphism test for all classes of graphs of maximum degree $d$ and diameter at most $O(\log n)$. In particular, this implies that there is an $n^{\text{polylog}(d)}$-isomorphism test for all families of $d$-regular expander graphs. #R##N#We derive this result from a more general (and quite technical) theorem about the so-called string isomorphism problem for a family of groups that also arises in Luks' work. This theorem has also other interesting applications, for example to the isomorphism problem for relational structures.

Connected through hyperedge HE-1 (induced by source paper "an improved isomorphism test for bounded tree width graphs"):
  with members:
    - "graph isomorphism for unit square graphs"
    - "canonizing graphs of bounded tree width in logspace"
    - "isomorphism testing for graphs of bounded rank width"
    - "reduction techniques for graph isomorphism in the context of width parameters"
    - "structure theorem and isomorphism test for graphs with excluded topological subgraphs"

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)