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 "homothetic triangle representations of planar graphs"):
  Abstract: We prove that every planar graph is the intersection graph of homothetic triangles in the plane.

Includes members:
  Member "dushnik miller dimension of td delaunay complexes":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "discrete morse theory for the collapsibility of supremum sections")
  Member "planar graphs as l intersection or l contact graphs":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "shorter labeling schemes for planar graphs")
  Member "computing cartograms with optimal complexity":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "homotopy height grid major height and graph drawing height")
  Member "optimal polygonal representation of planar graphs":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "on string contact representations in 3d")
  Member "on touching triangle graphs":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "optimal polygonal representation of planar graphs")

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.DM(Discrete Mathematics)