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: "moving vertices to make drawings plane"
  Abstract: A straight-line drawing $\delta$ of a planar graph $G$ need not be plane, but can be made so by moving some of the vertices. Let shift$(G,\delta)$ denote the minimum number of vertices that need to be moved to turn $\delta$ into a plane drawing of $G$. We show that shift$(G,\delta)$ is NP-hard to compute and to approximate, and we give explicit bounds on shift$(G,\delta)$ when $G$ is a tree or a general planar graph. Our hardness results extend to 1BendPointSetEmbeddability, a well-known graph-drawing problem.

Connected through hyperedge HE-1 (induced by source paper "geometry and generation of a new graph planarity game"):
  with members:
    - "untangling a planar graph"
    - "a polynomial bound for untangling geometric planar graphs"
    - "minimum weight triangulation is np hard"
    - "on the obfuscation complexity of planar graphs"

Connected through hyperedge HE-2 (induced by source paper "untangling planar graphs from a specified vertex position hard cases"):
  with members:
    - "untangling polygons and graphs"
    - "untangling a planar graph"
    - "a polynomial bound for untangling geometric planar graphs"
    - "on collinear sets in straight line drawings"
    - "on the obfuscation complexity of planar graphs"

Connected through hyperedge HE-3 (induced by source paper "untangling polygons and graphs"):
  with members:
    - "untangling a planar graph"
    - "a polynomial bound for untangling geometric planar graphs"
    - "on collinear sets in straight line drawings"
    - "on the obfuscation complexity of planar graphs"

Connected through hyperedge HE-4 (induced by source paper "untangling a planar graph"):
  with members:
    - "untangling polygons and graphs"
    - "a polynomial bound for untangling geometric planar graphs"
    - "on the obfuscation complexity of planar graphs"
    - "the problem of compatible representatives"

Connected through hyperedge HE-5 (induced by source paper "a polynomial bound for untangling geometric planar graphs"):
  with members:
    - "untangling polygons and graphs"
    - "on collinear sets in straight line drawings"
    - "on the obfuscation complexity of planar graphs"

Connected through hyperedge HE-6 (induced by source paper "on the obfuscation complexity of planar graphs"):
  with members:
    - "a polynomial bound for untangling geometric planar 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)