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: "quasi polynomial time approximation scheme for sparse subsets of polygons"
  Abstract: We describe how to approximate, in quasi-polynomial time, the largest independent set of polygons, in a given set of polygons. Our algorithm works by extending the result of Adamaszek and Wiese \cite{aw-asmwi-13, aw-qmwis-14} to polygons of arbitrary complexity. Surprisingly, the algorithm also works or computing the largest subset of the given set of polygons that has some sparsity condition. For example, we show that one can approximate the largest subset of polygons, such that the intersection graph of the subset does not contain a cycle of length $4$ (i.e., $K_{2,2}$).

Connected through hyperedge HE-1 (induced by source paper "efficient approximation schemes for uniform cost clustering problems in planar graphs"):
  with members:
    - "a polynomial time approximation scheme for facility location on planar graphs"
    - "tight fpt approximations for k median and k means"
    - "quasi polynomial time approximation schemes for packing and covering problems in planar graphs"
    - "a fast approximation scheme for low dimensional k means"
    - "new frameworks for offline and streaming coreset constructions"
    - "local search yields approximation schemes for k means and k median in euclidean and minor free metrics"
    - "optimal parameterized algorithms for planar facility location problems using voronoi diagrams"
    - "an improved approximation for k median and positive correlation in budgeted optimization"

Connected through hyperedge HE-2 (induced by source paper "computational geometry column 67"):
  with members:
    - "common tangents of two disjoint polygons in linear time and constant workspace"
    - "time space trade off for finding the k visibility region of a point in a polygon"
    - "an experimental study of algorithms for geodesic shortest paths in the constant workspace model"
    - "improved time space trade offs for computing voronoi diagrams"
    - "ime space trade offs for computing euclidean minimum spanning trees"
    - "time space trade offs for triangulations and voronoi diagrams"
    - "experimental study of compressed stack algorithms in limited memory environments"
    - "outer common tangents and nesting of convex hulls in linear time and constant workspace"

Connected through hyperedge HE-3 (induced by source paper "quasi polynomial time approximation schemes for packing and covering problems in planar graphs"):
  with members:
    - "optimal parameterized algorithms for planar facility location problems using voronoi diagrams"
    - "a qptas for maximum weight independent set of polygons with polylogarithmically many vertices"
    - "approximation schemes for maximum weight independent set of rectangles"

Connected through hyperedge HE-4 (induced by source paper "approximation schemes for independent set and sparse subsets of polygons"):
  with members:
    - "on approximating maximum independent set of rectangles"
    - "optimal parameterized algorithms for planar facility location problems using voronoi diagrams"
    - "shortest path in a polygon using sublinear space"
    - "approximation schemes for partitioning convex decomposition and surface approximation"
    - "a qptas for the base of the number of triangulations of a planar point set"
    - "a qptas for maximum weight independent set of polygons with polylogarithmically many vertices"
    - "approximation schemes for maximum weight independent set of rectangles"
    - "approximation algorithms for maximum independent set of pseudo disks"

Connected through hyperedge HE-5 (induced by source paper "optimality program in segment and string graphs"):
  with members:
    - "planar graphs as l intersection or l contact graphs"
    - "finding hitting and packing cycles in subexponential time on unit disk graphs"
    - "generalized feedback vertex set problems on bounded treewidth graphs chordality is the key to single exponential parameterized algorithms"
    - "approximation schemes for independent set and sparse subsets of polygons"
    - "optimal parameterized algorithms for planar facility location problems using voronoi diagrams"
    - "intersection graphs of segments and exists mathbb r"
    - "a qptas for maximum weight independent set of polygons with polylogarithmically many vertices"
    - "the clique problem in ray intersection graphs"

Connected through hyperedge HE-6 (induced by source paper "anchored rectangle and square packings"):
  with members:
    - "approximation schemes for independent set and sparse subsets of polygons"
    - "on approximating maximum independent set of rectangles"
    - "a constant factor approximation for multi covering with disks"
    - "a qptas for maximum weight independent set of polygons with polylogarithmically many vertices"
    - "approximation schemes for maximum weight independent set of rectangles"
    - "approximation algorithms for maximum independent set of pseudo disks"
    - "on the largest empty axis parallel box amidst n points"
    - "the problem of compatible representatives"

Connected through hyperedge HE-7 (induced by source paper "approximation and parameterized algorithms for geometric independent set with shrinking"):
  with members:
    - "subexponential parameterized algorithms for planar and apex minor free graphs via low treewidth pattern covering"
    - "on approximating maximum independent set of rectangles"
    - "optimal parameterized algorithms for planar facility location problems using voronoi diagrams"
    - "polynomial kernels for weighted problems"
    - "a qptas for maximum weight independent set of polygons with polylogarithmically many vertices"
    - "approximation schemes for maximum weight independent set of rectangles"
    - "approximation algorithms for maximum independent set of pseudo disks"

Connected through hyperedge HE-8 (induced by source paper "on approximating maximum independent set of rectangles"):
  with members:
    - "a qptas for maximum weight independent set of polygons with polylogarithmically many vertices"
    - "approximation schemes for maximum weight independent set of rectangles"
    - "approximation algorithms for maximum independent set of pseudo disks"

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)