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: "balanced partitions of 3 colored geometric sets in the plane"
  Abstract: Let S be a finite set of geometric objects partitioned into classes or colors. A subset S ' ? S is said to be balanced if S ' contains the same amount of elements of S from each of the colors. We study several problems on partitioning 3 -colored sets of points and lines in the plane into two balanced subsets: (a) We prove that for every 3-colored arrangement of lines there exists a segment that intersects exactly one line of each color, and that when there are 2 m lines of each color, there is a segment intercepting m lines of each color. (b) Given n red points, n blue points and n green points on any closed Jordan curve γ , we show that for every integer k with 0 ? k ? n there is a pair of disjoint intervals on γ whose union contains exactly k points of each color. (c) Given a set S of n red points, n blue points and n green points in the integer lattice satisfying certain constraints, there exist two rays with common apex, one vertical and one horizontal, whose union splits the plane into two regions, each one containing a balanced subset of S .

Connected through hyperedge HE-1 (induced by source paper "geometric systems of unbiased representatives"):
  with members:
    - "computing balanced islands in two colored point sets in the plane"
    - "on balanced 4 holes in bichromatic point sets"

Connected through hyperedge HE-2 (induced by source paper "equipartitions with wedges and cones"):
  with members:
    - "sharing a pizza bisecting masses with two cuts"
    - "ham sandwich cuts and center transversals in subspaces"
    - "computing balanced islands in two colored point sets in the plane"

Connected through hyperedge HE-3 (induced by source paper "the balanced connected subgraph problem"):
  with members:
    - "the graph motif problem parameterized by the structure of the input graph"
    - "solving the maximum weight connected subgraph problem to optimality"
    - "maximum balanced subgraph problem parameterized above lower bound"

Connected through hyperedge HE-4 (induced by source paper "matchings in geometric graphs"):
  with members:
    - "packing plane spanning trees and paths in complete geometric graphs"
    - "flip distance to a non crossing perfect matching"
    - "packing plane perfect matchings into a point set"
    - "10 gabriel graphs are hamiltonian"
    - "higher order triangular distance delaunay graphs graph theoretical properties"
    - "approximating the bottleneck plane perfect matching of a point set"
    - "fixed orientation equilateral triangle matching of point sets"
    - "bottleneck non crossing matching 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)