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: "on kinetic delaunay triangulations a near quadratic bound for unit speed motions"
  Abstract: Let $P$ be a collection of $n$ points in the plane, each moving along some straight line at unit speed. We obtain an almost tight upper bound of $O(n^{2+\epsilon})$, for any $\epsilon>0$, on the maximum number of discrete changes that the Delaunay triangulation $\mathbb{DT}(P)$ of $P$ experiences during this motion. Our analysis is cast in a purely topological setting, where we only assume that (i) any four points can be co-circular at most three times, and (ii) no triple of points can be collinear more than twice; these assumptions hold for unit speed motions.

Connected through hyperedge HE-1 (induced by source paper "kinetic geodesic voronoi diagrams in a simple polygon"):
  with members:
    - "computing a geodesic two center of points in a simple polygon"
    - "voronoi diagrams for a moderate sized point set in a simple polygon"
    - "visibility graphs dismantlability and the cops and robbers game"
    - "kinetic voronoi diagrams and delaunay triangulations under polygonal distance functions"

Connected through hyperedge HE-2 (induced by source paper "stable delaunay graphs"):
  with members:
    - "kinetic voronoi diagrams and delaunay triangulations under polygonal distance functions"
    - "a simple faster method for kinetic proximity problems"
    - "on topological changes in the delaunay triangulation of moving points"
    - "kinetic stable delaunay graphs"
    - "a kinetic triangulation scheme for moving points in the plane"

Connected through hyperedge HE-3 (induced by source paper "kinetic voronoi diagrams and delaunay triangulations under polygonal distance functions"):
  with members:
    - "stable delaunay graphs"
    - "on topological changes in the delaunay triangulation of moving points"
    - "kinetic stable delaunay graphs"

Connected through hyperedge HE-4 (induced by source paper "a simple faster method for kinetic proximity problems"):
  with members:
    - "on topological changes in the delaunay triangulation of moving points"
    - "sharp bounds on davenport schinzel sequences of every order"
    - "kinetic stable delaunay graphs"

Connected through hyperedge HE-5 (induced by source paper "on topological changes in the delaunay triangulation of moving points"):
  with members:
    - "kinetic stable delaunay graphs"
    - "a kinetic triangulation scheme for moving points in the plane"

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.CG(Computational Geometry)