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: "isometric diamond subgraphs"
  Abstract: We describe polynomial time algorithms for determining whether an undirected graph may be embedded in a distance-preserving way into the hexagonal tiling of the plane, the diamond structure in three dimensions, or analogous structures in higher dimensions. The graphs that may be embedded in this way form an interesting subclass of the partial cubes.

Connected through hyperedge HE-1 (induced by source paper "steinitz theorems for simple orthogonal polyhedra"):
  with members:
    - "adjacency preserving spatial treemaps"
    - "the complexity of bendless three dimensional orthogonal graph drawing"
    - "orientation constrained rectangular layouts"
    - "area universal rectangular layouts"
    - "the lattice dimension of a graph"
    - "nonorthogonal polyhedra built from rectangles"

Connected through hyperedge HE-2 (induced by source paper "optimal 3d angular resolution for low degree graphs"):
  with members:
    - "maximizing the total resolution of graphs"
    - "notes on large angle crossing graphs"
    - "trees with convex faces and optimal angles"
    - "the geometric thickness of low degree graphs"

Connected through hyperedge HE-3 (induced by source paper "the complexity of bendless three dimensional orthogonal graph drawing"):
  with members:
    - "inapproximability of orthogonal compaction"
    - "dynamic generators of topologically embedded graphs"

Connected through hyperedge HE-4 (induced by source paper "recognizing partial cubes in quadratic time"):
  with members:
    - "happy endings for flip graphs"
    - "optimal angular resolution for face symmetric drawings"
    - "upright quad drawing of st planar learning spaces"
    - "the lattice dimension of a graph"
    - "algorithms for drawing media"
    - "algorithms for media"

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)