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 bipartite graphs"):
  Abstract: A vertex set $D$ in a finite undirected graph $G$ is an {\em efficient dominating set} (\emph{e.d.s.} for short) of $G$ if every vertex of $G$ is dominated by exactly one vertex of $D$. The \emph{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). On the other hand, ED is solvable in linear time for $2P_2$-free and even for $P_5$-free graphs, and thus for $P_5$-free bipartite graphs. #R##N#Lu and Tang showed that ED is NP-complete for chordal bipartite graphs and for planar bipartite graphs;actually, ED is \NP-complete even for planar bipartite graphs with vertex degree at most 3. Thus, ED is NP-complete for $K_{1,4}$-free bipartite graphs. For $K_{1,3}$-free bipartite graphs, however, ED is solvable in polynomial time: For classes of bounded clique-width, ED is solvable in polynomial time. Dabrowski and Paulusma published a dichotomy for clique-width of $H$-free bipartite graphs. For instance, clique-width of $S_{1,2,3}$-free bipartite graphs is bounded (which includes $K_{1,3}$-free bipartite graphs). #R##N#We show that ED is NP-complete for $K_{3,3}$-free bipartite graphs. Moreover, we show that (weighted) ED can be solved in polynomial time for $H$-free bipartite graphs when $H$ is $P_7$ or $S_{1,2,4}$ or $\ell P_4$ for fixed $\ell$, and similarly for $P_9$-free bipartite graphs with vertex degree at most 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 "semitotal domination new hardness results and a polynomial time algorithm for graphs of bounded mim width")
  Member "efficient domination for some subclasses of p_6 free graphs in polynomial time":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "on efficient domination for some classes of h free chordal graphs")
  Member "classifying the clique width of h free bipartite graphs":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "clique width for graph classes closed under complementation")
  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 chordal graphs")
  Member "the dilworth number of auto chordal bipartite graphs":
    also connected through other hyperedges:
      (none)
  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 chordal graphs")
  Member "efficient dominating and edge dominating sets for graphs and hypergraphs":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "not all equal and 1 in degree decompositions algorithmic complexity and applications")

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)