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: "recursive tilings and space filling curves with little fragmentation"
  Abstract: This paper defines the Arrwwid number of a recursive tiling (or space-filling curve) as the smallest number w such that any ball Q can be covered by w tiles (or curve sections) with total volume O(vol(Q)). Recursive tilings and space-filling curves with low Arrwwid numbers can be applied to optimise disk, memory or server access patterns when processing sets of points in d-dimensional space. This paper presents recursive tilings and space-filling curves with optimal Arrwwid numbers. For d >= 3, we see that regular cube tilings and space-filling curves cannot have optimal Arrwwid number, and we see how to construct alternatives with better Arrwwid numbers.

Connected through hyperedge HE-1 (induced by source paper "onion curve a space filling curve with near optimal clustering"):
  with members:
    - "load balancing using hilbert space filling curves for parallel reservoir simulations"
    - "distributed balanced partitioning via linear embedding"

Connected through hyperedge HE-2 (induced by source paper "sixteen space filling curves and traversals for d dimensional cubes and simplices"):
  with members:
    - "how many three dimensional hilbert curves are there"
    - "hyperorthogonal well folded hilbert curves"
    - "morton curve segments produce no more than two distinct face connected subdomains"

Connected through hyperedge HE-3 (induced by source paper "how many three dimensional hilbert curves are there"):
  with members:
    - "hyperorthogonal well folded hilbert curves"
    - "recurrence for multidimensional space filling functions"
    - "locality and bounding box quality of two dimensional space filling curves"

Connected through hyperedge HE-4 (induced by source paper "harmonious hilbert curves and other extradimensional space filling curves"):
  with members:
    - "an inventory of three dimensional hilbert space filling curves"

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)