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 "on efficient domination for some classes of h free chordal graphs"):
  Abstract: A vertex set $D$ in a finite undirected graph $G$ is an efficient dominating set (e.d.s. for short) of $G$ if every vertex of $G$ is dominated by exactly one vertex of $D$. The Efficient Domination (ED) problem, which asks for the existence of an e.d.s.\ in $G$, is known to be \NP-complete even for very restricted graph classes such as for $2P_3$-free chordal graphs while it is solvable in polynomial time for $P_6$-free chordal graphs (and even for $P_6$-free graphs). A standard reduction from the \NP-complete Exact Cover problem shows that ED is \NP-complete for a very special subclass of chordal graphs generalizing split graphs. The reduction implies that ED is \NP-complete e.g.\ for double-gem-free chordal graphs while it is solvable in linear time for gem-free chordal graphs (by various reasons such as bounded clique-width, distance-hereditary graphs, chordal square etc.), and ED is \NP-complete for butterfly-free chordal graphs while it is solvable in linear time for $2P_2$-free graphs. #R##N#We show that (weighted) ED can be solved in polynomial time for $H$-free chordal graphs when $H$ is net, extended gem, or $S_{1,2,3}$.

Includes members:
  Member "polynomial time algorithms for weighted efficient domination problems in at free graphs and dually chordal graphs":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "on efficient domination for some classes of h free bipartite graphs")
  Member "bounding the clique width of h free chordal graphs":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "graph isomorphism for h_1 h_2 free graphs an almost complete dichotomy")
  Member "weighted efficient domination for p_6 free graphs in polynomial time":
    also connected through other hyperedges:
      (none)
  Member "efficient domination for some subclasses of p_6 free graphs in polynomial time":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "on efficient domination for some classes of h free bipartite graphs")
  Member "weighted efficient domination for p_5 kp_2 free graphs in polynomial time":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "on efficient domination for some classes of h free bipartite graphs")
  Member "new polynomial cases of the weighted efficient domination problem":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on efficient domination for some classes of h free bipartite graphs")
  Member "efficient dominating and edge dominating sets for graphs and hypergraphs":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "on efficient domination for some classes of h free bipartite graphs")
  Member "algorithms for unipolar and generalized split graphs":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "solving partition problems almost always requires pushing many vertices around")

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)