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: "trees with convex faces and optimal angles"
  Abstract: We consider drawings of trees in which all edges incident to leaves can be extended to infinite rays without crossing, partitioning the plane into infinite convex polygons. Among all such drawings we seek the one maximizing the angular resolution of the drawing. We find linear time algorithms for solving this problem, both for plane trees and for trees without a fixed embedding. In any such drawing, the edge lengths may be set independently of the angles, without crossing; we describe multiple strategies for setting these lengths.

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"
    - "steinitz theorems for simple orthogonal polyhedra"

Connected through hyperedge HE-2 (induced by source paper "on monotone drawings of trees"):
  with members:
    - "strongly monotone drawings of planar graphs"
    - "on self approaching and increasing chord drawings of 3 connected planar graphs"
    - "self approaching graphs"
    - "euclidean greedy drawings of trees"
    - "monotone grid drawings of planar graphs"

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

Connected through hyperedge HE-4 (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"
    - "isometric diamond subgraphs"
    - "the geometric thickness of low degree graphs"

Connected through hyperedge HE-5 (induced by source paper "bounds on the complexity of halfspace intersections when the bounded faces have small dimension"):
  with members:
    - "optimally fast incremental manhattan plane embedding and planar tight span construction"
    - "smoothed analysis of algorithms why the simplex algorithm usually takes polynomial time"

Connected through hyperedge HE-6 (induced by source paper "angle optimization of graphs embedded in the plane"):
  with members:
    - "drawing trees with perfect angular resolution and polynomial area"
    - "lombardi drawings of graphs"
    - "maximizing the total resolution of graphs"
    - "optimal angular resolution for face symmetric drawings"
    - "optimal point placement for mesh smoothing"

Connected through hyperedge HE-7 (induced by source paper "graph theoretic solutions to computational geometry problems"):
  with members:
    - "orientation constrained rectangular layouts"
    - "optimal angular resolution for face symmetric drawings"
    - "area universal rectangular layouts"
    - "testing bipartiteness of geometric intersection graphs"
    - "optimal embedding into star metrics"
    - "algorithms for drawing media"
    - "the traveling salesman problem for cubic graphs"

Connected through hyperedge HE-8 (induced by source paper "optimal angular resolution for face symmetric drawings"):
  with members:
    - "algorithms for drawing 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)