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 "selfish cops and passive robber part i qualitative games"):
  Abstract: Several variants of the CR game have been studied in the past. In this paper we examine the Selfish Cops and Passive Robber (SCPR) variant, which is played between two cops, each one independently trying to catch a "passive" robber.

Includes members:
  Member "simultaneously moving cops and robbers":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "selfish cops and active robber multi player pursuit evasion on graphs")
  Member "the role of visibility in pursuit evasion games":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "a game of cops and robbers on graphs with periodic edge connectivity")
  Member "cops and robbers game theory and zermelo s early results":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "a game of cops and robbers on graphs with periodic edge connectivity")
  Member "cops and invisible robbers the cost of drunkenness":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "selfish cops and active robber multi player pursuit evasion on 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)