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: "triangulating the square and squaring the triangle quadtrees and delaunay triangulations are equivalent"
  Abstract: We show that Delaunay triangulations and compressed quadtrees are equivalent structures. More precisely, we give two algorithms: the first computes a compressed quadtree for a planar point set, giv...

Connected through hyperedge HE-1 (induced by source paper "spanning trees in multipartite geometric graphs"):
  with members:
    - "dynamic planar voronoi diagrams for general distance functions and their algorithmic applications"

Connected through hyperedge HE-2 (induced by source paper "windows into geometric events data structures for time windowed querying of temporal point sets"):
  with members:
    - "windows into relational events data structures for contiguous subsequences of edges"
    - "fully retroactive approximate range and nearest neighbor searching"
    - "orthogonal range searching on the ram revisited"
    - "the skip quadtree a simple dynamic data structure for multidimensional data"
    - "internet packet filter management and rectangle geometry"

Connected through hyperedge HE-3 (induced by source paper "convex hull of points lying on lines in o nlogn time after preprocessing"):
  with members:
    - "instance optimal geometric algorithms"
    - "shape fitting on point sets with probability distributions"
    - "randomization yields simple o n log star n algorithms for difficult omega n problems"

Connected through hyperedge HE-4 (induced by source paper "convex hull of imprecise points in o n log n time after preprocessing"):
  with members:
    - "instance optimal geometric algorithms"
    - "shape fitting on point sets with probability distributions"
    - "randomization yields simple o n log star n algorithms for difficult omega n problems"

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)