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: "linear time algorithm for sliding tokens on trees"
  Abstract: Suppose that we are given two independent sets $I_b$ and $I_r$ of a graph such that $|I_b|=|I_r|$, and imagine that a token is placed on each vertex in $I_b$. Then, the sliding token problem is to determine whether there exists a sequence of independent sets which transforms $I_b$ into $I_r$ so that each independent set in the sequence results from the previous one by sliding exactly one token along an edge in the graph. This problem is known to be PSPACE-complete even for planar graphs, and also for bounded treewidth graphs. In this paper, we thus study the problem restricted to trees, and give the following three results: (1) the decision problem is solvable in linear time; (2) for a yes-instance, we can find in quadratic time an actual sequence of independent sets between $I_b$ and $I_r$ whose length (i.e., the number of token-slides) is quadratic; and (3) there exists an infinite family of instances on paths for which any sequence requires quadratic length.

Connected through hyperedge HE-1 (induced by source paper "independent set reconfiguration parameterized by modular width"):
  with members:
    - "token sliding on split graphs"
    - "the complexity of independent set reconfiguration on bipartite graphs"
    - "token jumping in minor closed classes"
    - "token sliding on chordal graphs"
    - "reconfiguring independent sets in claw free graphs"
    - "fixed parameter tractability of token jumping on planar graphs"
    - "algorithms parameterized by vertex cover and modular width through potential maximal cliques"
    - "parameterized algorithms for modular width"

Connected through hyperedge HE-2 (induced by source paper "shortest reconfiguration sequence for sliding tokens on spiders"):
  with members:
    - "token sliding on split graphs"
    - "a simple proof that the n 2 1 puzzle is hard"
    - "token sliding on chordal graphs"
    - "parameterized complexity of graph constraint logic"
    - "shortest reconfiguration of sliding tokens on a caterpillar"
    - "reconfiguring independent sets in claw free graphs"
    - "reconfiguration over tree decompositions"
    - "on the parameterized complexity of reconfiguration problems"

Connected through hyperedge HE-3 (induced by source paper "reconfiguring k path vertex covers"):
  with members:
    - "reoptimization of path vertex cover problem"
    - "token sliding on split graphs"
    - "parameterized algorithm for 3 path vertex cover"
    - "the complexity of independent set reconfiguration on bipartite graphs"
    - "token sliding on chordal graphs"
    - "reconfiguring independent sets in claw free graphs"
    - "the complexity of change"
    - "pspace completeness of sliding block puzzles and other problems through the nondeterministic constraint logic model of computation"

Connected through hyperedge HE-4 (induced by source paper "reconfiguration of connected graph partitions"):
  with members:
    - "fair redistricting is hard"
    - "token sliding on chordal graphs"
    - "approximation and hardness for token swapping"
    - "distributed evolutionary graph partitioning"

Connected through hyperedge HE-5 (induced by source paper "reconfiguration of colorable sets in classes of perfect graphs"):
  with members:
    - "token sliding on split graphs"
    - "the complexity of independent set reconfiguration on bipartite graphs"
    - "wireless scheduling graph classes and c colorable subgraphs"
    - "universal framework for wireless scheduling problems"
    - "token sliding on chordal graphs"
    - "reconfiguring independent sets in claw free graphs"
    - "on the parameterized complexity of reconfiguration problems"
    - "the complexity of change"

Connected through hyperedge HE-6 (induced by source paper "reconfiguration of satisfying assignments and subset sums easy to find hard to connect"):
  with members:
    - "the complexity of independent set reconfiguration on bipartite graphs"
    - "the complexity of dominating set reconfiguration"
    - "reconfiguring independent sets in claw free graphs"
    - "shortest reconfiguration paths in the solution space of boolean formulas"
    - "a computational trichotomy for connectivity of boolean satisfiability"
    - "the complexity of change"
    - "the complexity of rerouting shortest paths"
    - "the connectivity of boolean satisfiability computational and structural dichotomies"

Connected through hyperedge HE-7 (induced by source paper "token sliding on split graphs"):
  with members:
    - "reconfiguration of colorable sets in classes of perfect graphs"
    - "the complexity of independent set reconfiguration on bipartite graphs"
    - "token jumping in minor closed classes"
    - "token sliding on chordal graphs"
    - "reconfiguring independent sets in claw free graphs"
    - "fixed parameter tractability of token jumping on planar graphs"
    - "on the parameterized complexity of reconfiguration problems"
    - "the complexity of change"

Connected through hyperedge HE-8 (induced by source paper "independent set reconfiguration thresholds of hereditary graph classes"):
  with members:
    - "reconfiguration on sparse graphs"
    - "reconfiguring independent sets in claw free graphs"
    - "reconfiguration in bounded bandwidth and treedepth"
    - "efficient multi robot motion planning for unlabeled discs in simple polygons"
    - "on the parameterized complexity of reconfiguration problems"
    - "the complexity of change"
    - "kernel bounds for path and cycle problems"
    - "fast mixing of parallel glauber dynamics and low delay csma scheduling"

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)