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: "steinitz theorems for simple orthogonal polyhedra"
  Abstract: We define a  simple orthogonal polyhedron  to be a three-dimensional polyhedron with the topology of a sphere in which three mutually-perpendicular edges meet at each vertex.By analogy to Steinitz's theorem characterizing the graphs of convex polyhedra, we find graph-theoretic characterizations of three classes of simple orthogonal polyhedra:  corner polyhedra , which can be drawn by isometric projection in the plane with only one hidden vertex,  xyz polyhedra , in which each axis-parallel line through a vertex contains exactly one other vertex, and arbitrary simple orthogonal polyhedra. In particular, the graphs of  xyz  polyhedra are exactly the bipartite cubic polyhedral graphs, and every bipartite cubic polyhedral graph with a 4-connected dual graph is the graph of a corner polyhedron. Based on our characterizations we find efficient algorithms for constructing orthogonal polyhedra from their graphs.

Connected through hyperedge HE-1 (induced by source paper "realization and connectivity of the graphs of origami flat foldings"):
  with members:
    - "flat foldings of plane graphs with prescribed angles and edge lengths"
    - "trees with convex faces and optimal angles"

Connected through hyperedge HE-2 (induced by source paper "flows in one crossing minor free graphs"):
  with members:
    - "multiple source multiple sink maximum flow in directed planar graphs in near linear time"

Connected through hyperedge HE-3 (induced by source paper "the graphs of planar soap bubbles"):
  with members:
    - "drawing trees with perfect angular resolution and polynomial area"
    - "planar lombardi drawings for subcubic graphs"
    - "small grid embeddings of 3 polytopes"
    - "lombardi drawings of graphs"
    - "steiner trees and spanning trees in six pin soap films"
    - "moebius invariant natural neighbor interpolation"
    - "optimal moebius transformations for information visualization and meshing"

Connected through hyperedge HE-4 (induced by source paper "planar lombardi drawings for subcubic graphs"):
  with members:
    - "drawing trees with perfect angular resolution and polynomial area"
    - "the graphs of planar soap bubbles"
    - "lombardi drawings of graphs"
    - "optimal moebius transformations for information visualization and meshing"

Connected through hyperedge HE-5 (induced by source paper "regular labelings and geometric structures"):
  with members:
    - "orientation constrained rectangular layouts"
    - "area universal rectangular layouts"
    - "compact floor planning via orderly spanning trees"

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)