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: "epsilon unfolding orthogonal polyhedra"
  Abstract: An unfolding of a polyhedron is produced by cutting the surface and flattening to a single, connected, planar piece without overlap (except possibly at boundary points). It is a long unsolved problem to determine whether every polyhedron may be unfolded. Here we prove, via an algorithm, that every orthogonal polyhedron (one whose faces meet at right angles) of genus zero may be unfolded. Our cuts are not necessarily along edges of the polyhedron, but they are always parallel to polyhedron edges. For a polyhedron of n vertices, portions of the unfolding will be rectangular strips which, in the worst case, may need to be as thin as epsilon = 1/2^{Omega(n)}.

Connected through hyperedge HE-1 (induced by source paper "unfolding polyhedra"):
  with members:
    - "some polycubes have no edge unzipping"
    - "addendum to edge unfolding nearly flat convex caps"
    - "edge unfolding nearly flat convex caps"
    - "unfolding genus 2 orthogonal polyhedra with linear refinement"
    - "spiral unfoldings of convex polyhedra"
    - "existence of a polyhedron which does not have a non overlapping pseudo edge unfolding"
    - "a class of convex polyhedra with few edge unfoldings"
    - "unfolding orthogonal terrains"

Connected through hyperedge HE-2 (induced by source paper "unfolding genus 2 orthogonal polyhedra with linear refinement"):
  with members:
    - "unfolding orthogonal polyhedra with quadratic refinement the delta unfolding algorithm"
    - "unfolding manhattan towers"
    - "ununfoldable polyhedra with convex faces"

Connected through hyperedge HE-3 (induced by source paper "unfolding orthogonal polyhedra with quadratic refinement the delta unfolding algorithm"):
  with members:
    - "unfolding manhattan towers"
    - "ununfoldable polyhedra with convex faces"

Connected through hyperedge HE-4 (induced by source paper "continuous blooming of convex polyhedra"):
  with members:
    - "unfolding convex polyhedra via quasigeodesic star unfoldings"
    - "star unfolding convex polyhedra via quasigeodesic loops"
    - "ununfoldable polyhedra with convex faces"

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)