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: "extending partial representations of function graphs and permutation graphs"
  Abstract: Function graphs are graphs representable by intersections of continuous real-valued functions on the interval [0,1] and are known to be exactly the complements of comparability graphs. As such they are recognizable in polynomial time. Function graphs generalize permutation graphs, which arise when all functions considered are linear. #R##N#We focus on the problem of extending partial representations, which generalizes the recognition problem. We observe that for permutation graphs an easy extension of Golumbic's comparability graph recognition algorithm can be exploited. This approach fails for function graphs. Nevertheless, we present a polynomial-time algorithm for extending a partial representation of a graph by functions defined on the entire interval [0,1] provided for some of the vertices. On the other hand, we show that if a partial representation consists of functions defined on subintervals of [0,1], then the problem of extending this representation to functions on the entire interval [0,1] becomes NP-complete.

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 "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"
    - "a kuratowski type theorem for planarity of partially embedded graphs"

Connected through hyperedge HE-3 (induced by source paper "extending partial representations of unit circular arc graphs"):
  with members:
    - "the partial visibility representation extension problem"
    - "extending partial representations of interval graphs"
    - "extending partial representations of circle graphs"
    - "extending partial representations of subclasses of chordal graphs"

Connected through hyperedge HE-4 (induced by source paper "recognizing simple triangle graphs by restricted 2 chain subgraph cover"):
  with members:
    - "a vertex ordering characterization of simple triangle graphs"
    - "graph isomorphism completeness for trapezoid graphs"
    - "the recognition of simple triangle graphs and of linear interval orders is polynomial"
    - "the recognition of tolerance and bounded tolerance graphs"

Connected through hyperedge HE-5 (induced by source paper "on the classes of interval graphs of limited nesting and count of lengths"):
  with members:
    - "extending partial representations of unit circular arc graphs"
    - "on the thinness and proper thinness of a graph"
    - "fo model checking of interval graphs"
    - "type based self stabilisation for computational fields"
    - "fo model checking on posets of bounded width"
    - "minimal and short representations of unit interval and unit circular arc graphs"
    - "bounded representations of interval and proper interval graphs"
    - "extending partial representations of interval graphs"

Connected through hyperedge HE-6 (induced by source paper "the partial visibility representation extension problem"):
  with members:
    - "recognition and complexity of point visibility graphs"
    - "extending partial representations of circle graphs"
    - "extending partial representations of subclasses of chordal graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"
    - "unsolved problems in visibility graphs of points segments and polygons"

Connected through hyperedge HE-7 (induced by source paper "extending partial representations of circle graphs"):
  with members:
    - "the partial visibility representation extension problem"
    - "completing orientations of partially oriented graphs"
    - "minimal and short representations of unit interval and unit circular arc graphs"
    - "bounded representations of interval and proper interval graphs"
    - "extending partial representations of interval graphs"
    - "linear time algorithm for partial representation extension of interval graphs"
    - "extending partial representations of proper and unit interval graphs"
    - "extending partial representations of subclasses of chordal graphs"

Connected through hyperedge HE-8 (induced by source paper "bounded representations of interval and proper interval graphs"):
  with members:
    - "linear time algorithm for partial representation extension of interval graphs"
    - "extending partial representations of circle graphs"
    - "extending partial representations of proper and unit interval graphs"
    - "extending partial representations of subclasses of chordal graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"
    - "simultaneous interval 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.DS(Data Structures and Algorithms)