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: "point sets with many non crossing perfect matchings"
  Abstract: Abstract   The maximum number of non-crossing straight-line perfect matchings that a set of n points in the plane can have is known to be    O  (    10.0438    n    )    and      Ω    ⁎    (    3    n    )   . The lower bound, due to Garcia, Noy, and Tejel (2000), is attained by the double chain, which has    Θ  (    3    n    /    n    Θ  (  1  )    )    such matchings. We reprove this bound in a simplified way that uses the novel notion of down-free matchings. We then apply this approach to several other constructions. As a result, we improve the lower bound. First we show that the double zigzag chain with n points has      Θ    ⁎    (    λ    n    )    non-crossing perfect matchings with    λ  ≈  3.0532   . Next we analyze further generalizations of double zigzag chains – double r-chains. The best choice of parameters leads to a construction that has      Θ    ⁎    (    ν    n    )    matchings with    ν  ≈  3.0930   . The derivation of this bound requires an analysis of a coupled dynamic-programming recursion between two infinite vectors.

Connected through hyperedge HE-1 (induced by source paper "a new lower bound on the maximum number of plane graphs using production matrices"):
  with members:
    - "counting plane graphs cross graph charging schemes"
    - "bounds on the maximum multiplicity of some common geometric graphs"

Connected through hyperedge HE-2 (induced by source paper "flip distance to a non crossing perfect matching"):
  with members:
    - "quasi parallel segments and characterization of unique bichromatic matchings"
    - "flip distance between triangulations of a simple polygon is np complete"
    - "bichromatic compatible matchings"

Connected through hyperedge HE-3 (induced by source paper "quasi parallel segments and characterization of unique bichromatic matchings"):
  with members:
    - "linear transformation distance for bichromatic matchings"
    - "bichromatic compatible matchings"

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)