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: "layout of graphs with bounded tree width"
  Abstract: A queue layout of a graph consists of a total order of the vertices, and a partition of the edges into queues, such that no two edges in the same queue are nested. The minimum number of queues in a queue layout of a graph is its queue-number. A three-dimensional (straight-line grid) drawing of a graph represents the vertices by points in $\mathbb{Z}^3$ and the edges by noncrossing line-segments. This paper contributes three main results:#R##N#(1) It is proved that the minimum volume of a certain type of three-dimensional drawing of a graph G is closely related to the queue-number of G. In particular, if G is an n-vertex member of a proper minor-closed family of graphs (such as a planar graph), then G has a $\mathcal{O}(1) \times \mathcal{O}(1) \times \mathcal{O}(n)$ drawing if and only if G has a $\mathcal{O}(1)$ queue-number.#R##N#(2) It is proved that the queue-number is bounded by the tree-width, thus resolving an open problem due to Ganley and Heath [Discrete Appl. Math., 109 (2001), pp. 215--221] and disproving a conjecture of Pemmaraju [Exploring the Powers of Stacks and Queues via Graph Layouts, Ph. D. thesis, Virginia Polytechnic Institute and State University, Blacksburg, VA, 1992]. This result provides renewed hope for the positive resolution of a number of open problems in the theory of queue layouts.#R##N#(3) It is proved that graphs of bounded tree-width have three-dimensional drawings with $\mathcal{O}(n)$ volume. This is the most general family of graphs known to admit three-dimensional drawings with $\mathcal{O}(n)$ volume.#R##N#The proofs depend upon our results regarding track layouts and tree-partitions of graphs, which may be of independent interest.

Connected through hyperedge HE-1 (induced by source paper "planar graphs have bounded queue number"):
  with members:
    - "shorter labeling schemes for planar graphs"
    - "planar graphs of bounded degree have constant queue number"
    - "polynomial bounds for centered colorings on proper minor closed graph classes"
    - "queue layouts of planar 3 trees"
    - "layouts for plane graphs on constant number of tracks"
    - "an annotated bibliography on 1 planarity"
    - "stack and queue layouts via layered separators"
    - "on the queue number of graphs with bounded tree width"

Connected through hyperedge HE-2 (induced by source paper "improved bounds for track numbers of planar graphs"):
  with members:
    - "planar graphs have bounded queue number"
    - "queue layouts of planar 3 trees"
    - "on the queue number of graphs with bounded tree width"

Connected through hyperedge HE-3 (induced by source paper "planar graphs of bounded degree have constant queue number"):
  with members:
    - "planar graphs have bounded queue number"
    - "queue layouts of planar 3 trees"
    - "mixed linear layouts of planar graphs"
    - "stack and queue layouts via layered separators"
    - "on the queue number of graphs with bounded tree width"
    - "graph layouts via layered separators"

Connected through hyperedge HE-4 (induced by source paper "queue layouts of planar 3 trees"):
  with members:
    - "mixed linear layouts of planar graphs"
    - "stack and queue layouts via layered separators"
    - "on the queue number of graphs with bounded tree width"
    - "graph layouts via layered separators"

Connected through hyperedge HE-5 (induced by source paper "layouts for plane graphs on constant number of tracks"):
  with members:
    - "graph layouts via layered separators"

Connected through hyperedge HE-6 (induced by source paper "drawing graphs on few lines and few planes"):
  with members:
    - "the complexity of drawing graphs on few lines and few planes"
    - "graph layouts via layered separators"
    - "on collinear sets in straight line drawings"

Connected through hyperedge HE-7 (induced by source paper "stack and queue layouts via layered separators"):
  with members:
    - "on the book thickness of 1 planar graphs"
    - "graph layouts via layered separators"
    - "bidimensionality and geometric graphs"

Connected through hyperedge HE-8 (induced by source paper "on the queue number of graphs with bounded tree width"):
  with members:
    - "graph layouts via layered separators"

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)