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: "equilateral l contact graphs"
  Abstract: We consider {\em L-graphs}, that is contact graphs of axis-aligned L-shapes in the plane, all with the same rotation. We provide several characterizations of L-graphs, drawing connections to Schnyder realizers and canonical orders of maximally planar graphs. We show that every contact system of L's can always be converted to an equivalent one with equilateral L's. This can be used to show a stronger version of a result of Thomassen, namely, that every planar graph can be represented as a contact system of square-based cuboids. #R##N#We also study a slightly more restricted version of equilateral L-contact systems and show that these are equivalent to homothetic triangle contact representations of maximally planar graphs. We believe that this new interpretation of the problem might allow for efficient algorithms to find homothetic triangle contact representations, that do not use Schramm's monster packing theorem.

Connected through hyperedge HE-1 (induced by source paper "cpg graphs some structural and hardness results"):
  with members:
    - "planar graphs as l intersection or l contact graphs"
    - "on edge intersection graphs of paths with 2 bends"

Connected through hyperedge HE-2 (induced by source paper "on contact graphs of paths on a grid"):
  with members:
    - "planar graphs as l intersection or l contact graphs"

Connected through hyperedge HE-3 (induced by source paper "max point tolerance graphs"):
  with members:
    - "c and a new graph model"

Connected through hyperedge HE-4 (induced by source paper "order preserving 1 string representations of planar graphs"):
  with members:
    - "1 string b_1 vpg representations of planar partial 3 trees and some subclasses"
    - "1 string b_2 vpg representation of planar graphs"

Connected through hyperedge HE-5 (induced by source paper "pixel and voxel representations of graphs"):
  with members:
    - "1 visibility representations of 1 planar graphs"
    - "bar 1 visibility graphs and their relation to other nearly planar graphs"
    - "on triangulating k outerplanar graphs"
    - "computing cartograms with optimal complexity"
    - "optimal polygonal representation of planar graphs"
    - "rectangular layouts and contact graphs"

Connected through hyperedge HE-6 (induced by source paper "contact representations of graphs in 3d"):
  with members:
    - "the galois complexity of graph drawing why numerical solutions are ubiquitous for force directed spectral and circle packing drawings"
    - "rectangular layouts and contact graphs"

Connected through hyperedge HE-7 (induced by source paper "primal dual representations of planar graphs and l contact representations of optimal 1 planar graphs"):
  with members:
    - "the galois complexity of graph drawing why numerical solutions are ubiquitous for force directed spectral and circle packing drawings"
    - "rectangular layouts and contact graphs"

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)