human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "placing your coins on a shelf"):
  Abstract: We consider the problem of packing a family of disks ``on a shelf,'' that is, such that each disk touches the  x -axis from above and such that no two disks overlap. We study the problem of minimizing the distance between the leftmost point and the rightmost point of any disk in such a packing.  We show how to approximate this problem within a factor of  4/3  in  O(n log n)  time. We further provide an  O(n log n) -time exact algorithm for a special case which includes inputs where the ratio between the largest radius and the smallest radius is less than four.  On the negative side, we prove that the problem is NP-hard even when the ratio between the largest radius and the smallest radius is at most 36.

Includes members:
  Member "the triangle scheduling problem":
    also connected through other hyperedges:
      (none)
  Member "recognizing weighted disk contact graphs":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "computing stable demers cartograms")
  Member "circle packing for origami design is hard":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "worst case optimal covering of rectangles by disks")

Question: Please tell me which class the source paper 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)