human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "efficient dominating and edge dominating sets for graphs and hypergraphs"
  Abstract: Let G=(V,E) be a graph. A vertex dominates itself and all its neighbors, i.e., every vertex v in V dominates its closed neighborhood N[v]. A vertex set D in G is an efficient dominating (e.d.) set for G if for every vertex v in V, there is exactly one d in D dominating v. An edge set M is an efficient edge dominating (e.e.d.) set for G if it is an efficient dominating set in the line graph L(G) of G. The ED problem (EED problem, respectively) asks for the existence of an e.d. set (e.e.d. set, respectively) in the given graph. #R##N#We give a unified framework for investigating the complexity of these problems on various classes of graphs. In particular, we solve some open problems and give linear time algorithms for ED and EED on dually chordal graphs. #R##N#We extend the two problems to hypergraphs and show that ED remains NP-complete on alpha-acyclic hypergraphs, and is solvable in polynomial time on hypertrees, while EED is polynomial on alpha-acyclic hypergraphs and NP-complete on hypertrees.

Connected through hyperedge HE-1 (induced by source paper "on efficient domination for some classes of h free bipartite graphs"):
  with members:
    - "polynomial time algorithms for weighted efficient domination problems in at free graphs and dually chordal graphs"
    - "efficient domination for some subclasses of p_6 free graphs in polynomial time"
    - "classifying the clique width of h free bipartite graphs"
    - "weighted efficient domination for p_5 kp_2 free graphs in polynomial time"
    - "the dilworth number of auto chordal bipartite graphs"
    - "new polynomial cases of the weighted efficient domination problem"

Connected through hyperedge HE-2 (induced by source paper "not all equal and 1 in degree decompositions algorithmic complexity and applications"):
  with members:
    - "polynomial time algorithms for weighted efficient domination problems in at free graphs and dually chordal graphs"
    - "the parameterized complexity of domination type problems and application to linear codes"
    - "algorithmic complexity of proper labeling problems"
    - "minimum weight triangulation is np hard"

Connected through hyperedge HE-3 (induced by source paper "on efficient domination for some classes of h free chordal graphs"):
  with members:
    - "polynomial time algorithms for weighted efficient domination problems in at free graphs and dually chordal graphs"
    - "bounding the clique width of h free chordal graphs"
    - "weighted efficient domination for p_6 free graphs in polynomial time"
    - "efficient domination for some subclasses of p_6 free graphs in polynomial time"
    - "weighted efficient domination for p_5 kp_2 free graphs in polynomial time"
    - "new polynomial cases of the weighted efficient domination problem"
    - "algorithms for unipolar and generalized split graphs"

Connected through hyperedge HE-4 (induced by source paper "perfect edge domination hard and solvable cases"):
  with members:
    - "efficient and perfect domination on circular arc graphs"
    - "dominating induced matchings in graphs containing no long claw"
    - "exact algorithms for dominating induced matching based on graph partition"
    - "an o 1 1939 n time algorithm for minimum weighted dominating induced matching"
    - "exact algorithms for dominating induced matchings"

Connected through hyperedge HE-5 (induced by source paper "the parameterized complexity of the equidomination problem"):
  with members:
    - "recognizing k equistable graphs in fpt time"

Connected through hyperedge HE-6 (induced by source paper "efficient domination for some subclasses of p_6 free graphs in polynomial time"):
  with members:
    - "polynomial time algorithms for weighted efficient domination problems in at free graphs and dually chordal graphs"
    - "weighted efficient domination in classes of p 6 free graphs"
    - "weighted efficient domination for p_5 kp_2 free graphs in polynomial time"
    - "new polynomial cases of the weighted efficient domination problem"

Connected through hyperedge HE-7 (induced by source paper "efficient and perfect domination on circular arc graphs"):
  with members:
    - "exact algorithms for dominating induced matchings"

Connected through hyperedge HE-8 (induced by source paper "dominating induced matchings for p_8 free graphs in polynomial time"):
  with members:
    - "dominating induced matchings in graphs containing no long claw"

Question: Please tell me which class the center node 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)