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 "linear semiorders and their incomparability graphs"):
  Abstract: A linear-interval order is the intersection of a linear order and an interval order. For this class of orders, several structural results have been shown. In this paper, we study a natural subclass of linear-interval orders. We call a partial order a \emph{linear-semiorder} if it is the intersection of a linear order and a semiorder. We show a characterization of linear-semiorders in terms of linear extensions. This gives a vertex ordering characterization of their incomparability graphs. We also show that being a linear-semiorder is a comparability invariant.

Includes members:
  Member "recognizing simple triangle graphs by restricted 2 chain subgraph cover":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "a linear time algorithm for maximum cardinality matching on cocomparability graphs")
  Member "a vertex ordering characterization of simple triangle graphs":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "recognizing simple triangle graphs by restricted 2 chain subgraph cover")
  Member "the recognition of simple triangle graphs and of linear interval orders is polynomial":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "a linear time algorithm for maximum cardinality matching on cocomparability 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)