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: "planar and poly arc lombardi drawings"
  Abstract: In Lombardi drawings of graphs, edges are represented as circular arcs and the edges incident on vertices have perfect angular resolution. It is known that not every planar graph has a planar Lombardi drawing. We give an example of a planar 3-tree that has no planar Lombardi drawing and we show that all outerpaths do have a planar Lombardi drawing. Further, we show that there are graphs that do not even have any Lombardi drawing at all. With this in mind, we generalize the notion of Lombardi drawings to that of (smooth) $k$-Lombardi drawings, in which each edge may be drawn as a (differentiable) sequence of $k$ circular arcs; we show that every graph has a smooth $2$-Lombardi drawing and every planar graph has a smooth planar $3$-Lombardi drawing. We further investigate related topics connecting planarity and Lombardi drawings.

Connected through hyperedge HE-1 (induced by source paper "bipartite and series parallel graphs without planar lombardi drawings"):
  with members:
    - "lombardi drawings of knots and links"
    - "drawing trees with perfect angular resolution and polynomial area"
    - "lombardi drawings of graphs"

Connected through hyperedge HE-2 (induced by source paper "lombardi drawings of knots and links"):
  with members:
    - "smooth orthogonal drawings of planar graphs"
    - "planar lombardi drawings for subcubic graphs"
    - "lombardi drawings of graphs"
    - "on a tree and a path with no geometric simultaneous embedding"

Connected through hyperedge HE-3 (induced by source paper "drawing trees with perfect angular resolution and polynomial area"):
  with members:
    - "planar lombardi drawings for subcubic graphs"
    - "the graphs of planar soap bubbles"
    - "pinning balloons with perfect angles and optimal area"
    - "lombardi drawings of graphs"
    - "trees with convex faces and optimal angles"
    - "confluent drawings visualizing non planar diagrams in a planar way"

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)