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: "a kuratowski type theorem for planarity of partially embedded graphs"
  Abstract: A partially embedded graph (or PEG) is a triple (G,H,\H), where G is a graph, H is a subgraph of G, and \H is a planar embedding of H. We say that a PEG (G,H,\H) is planar if the graph G has a planar embedding that extends the embedding \H. #R##N#We introduce a containment relation of PEGs analogous to graph minor containment, and characterize the minimal non-planar PEGs with respect to this relation. We show that all the minimal non-planar PEGs except for finitely many belong to a single easily recognizable and explicitly described infinite family. We also describe a more complicated containment relation which only has a finite number of minimal non-planar PEGs. #R##N#Furthermore, by extending an existing planarity test for PEGs, we obtain a polynomial-time algorithm which, for a given PEG, either produces a planar embedding or identifies an obstruction.

Connected through hyperedge HE-1 (induced by source paper "extending upward planar graph drawings"):
  with members:
    - "upward book embeddings of st graphs"
    - "upward planar morphs"
    - "windrose planarity embedding graphs with direction constrained edges"
    - "planar l drawings of directed graphs"
    - "ordered level planarity geodesic planarity and bi monotonicity"
    - "the partial visibility representation extension problem"
    - "beyond level planarity"
    - "extending partial representations of circle graphs"

Connected through hyperedge HE-2 (induced by source paper "an spqr tree like embedding representation for upward planarity"):
  with members:
    - "extending upward planar graph drawings"
    - "bend minimum orthogonal drawings in quadratic time"
    - "level planarity transitivity vs even crossings"
    - "simultaneous embedding edge orderings relative positions cutvertices"
    - "orthogonal graph drawing with inflexible edges"
    - "planar embeddings with small and uniform faces"
    - "optimal orthogonal graph drawing with convex bend costs"
    - "simultaneous embedding of planar graphs"

Connected through hyperedge HE-3 (induced by source paper "extending simple drawings with one edge is hard"):
  with members:
    - "extending upward planar graph drawings"
    - "extending simple drawings"
    - "the partial visibility representation extension problem"
    - "saturated simple and 2 simple topological graphs with few edges"
    - "extending partial representations of circle graphs"
    - "adding one edge to planar graphs makes crossing number and 1 planarity hard"
    - "extending partial representations of subclasses of chordal graphs"
    - "extending partial representations of function graphs and permutation graphs"

Connected through hyperedge HE-4 (induced by source paper "extending simple drawings"):
  with members:
    - "extending upward planar graph drawings"
    - "topological drawings of complete bipartite graphs"
    - "saturated simple and 2 simple topological graphs with few edges"
    - "adding one edge to planar graphs makes crossing number and 1 planarity hard"

Connected through hyperedge HE-5 (induced by source paper "multilevel planarity"):
  with members:
    - "ordered level planarity geodesic planarity and bi monotonicity"
    - "beyond level planarity"

Connected through hyperedge HE-6 (induced by source paper "hierarchical partial planarity"):
  with members:
    - "simultaneous orthogonal planarity"
    - "simultaneous drawing of planar graphs with right angle crossings and few bends"
    - "planarity of streamed graphs"
    - "drawing partially embedded and simultaneously planar graphs"
    - "streamed graph drawing and the file maintenance problem"
    - "advancements on sefe and partitioned book embedding problems"
    - "picking planar edges or drawing a graph with a planar subgraph"
    - "algorithms and bounds for drawing non planar graphs with crossing free subgraphs"

Connected through hyperedge HE-7 (induced by source paper "drawing partially embedded and simultaneously planar graphs"):
  with members:
    - "simultaneous embeddings with few bends and crossings"
    - "adding one edge to planar graphs makes crossing number and 1 planarity hard"
    - "testing simultaneous planarity when the common graph is 2 connected"
    - "simultaneous embedding of a planar graph and its dual on the grid"

Connected through hyperedge HE-8 (induced by source paper "drawing planar graphs with a prescribed inner face"):
  with members:
    - "drawing graphs in the plane with a prescribed outer face and polynomial area"
    - "planar drawings of higher genus graphs"

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)