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: "computing a visibility polygon using few variables"
  Abstract: We present several algorithms for computing the visibility polygon of a simple polygon $P$ from a viewpoint inside the polygon, when the polygon resides in read-only memory and only few working variables can be used. The first algorithm uses a constant number of variables, and outputs the vertices of the visibility polygon in $O(n\Rout)$ time, where $\Rout$ denotes the number of reflex vertices of $P$ that are part of the output. The next two algorithms use $O(\log \Rin)$ variables, and output the visibility polygon in $O(n\log \Rin)$ randomized expected time or $O(n\log^2 \Rin)$ deterministic time, where $\Rin$ is the number of reflex vertices of $P$.

Connected through hyperedge HE-1 (induced by source paper "time space trade off for finding the k visibility region of a point in a polygon"):
  with members:
    - "modem illumination of monotone polygons"
    - "memory constrained algorithms for simple polygons"
    - "space time trade offs for stack based algorithms"

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 "improved time space trade offs for computing voronoi diagrams"):
  with members:
    - "shortest path in a polygon using sublinear space"
    - "memory constrained algorithms for simple polygons"

Connected through hyperedge HE-4 (induced by source paper "a new optimal algorithm for computing the visibility area of a simple polygon from a viewpoint"):
  with members:
    - "memory constrained algorithms for simple polygons"
    - "space efficient algorithms for visibility problems in simple polygon"

Connected through hyperedge HE-5 (induced by source paper "nearly optimal space efficient algorithm for depth first search"):
  with members:
    - "linear programming in the semi streaming model with application to the maximum matching problem"

Connected through hyperedge HE-6 (induced by source paper "ime space trade offs for computing euclidean minimum spanning trees"):
  with members:
    - "improved time space trade offs for computing voronoi diagrams"
    - "shortest path in a polygon using sublinear space"
    - "memory constrained algorithms for simple polygons"

Connected through hyperedge HE-7 (induced by source paper "time space trade offs for triangulations and voronoi diagrams"):
  with members:
    - "shortest path in a polygon using sublinear space"
    - "memory constrained algorithms for simple polygons"
    - "space time trade offs for stack based algorithms"

Connected through hyperedge HE-8 (induced by source paper "experimental study of compressed stack algorithms in limited memory environments"):
  with members:
    - "julia a fresh approach to numerical computing"

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)