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 proper and unit interval graphs"
  Abstract: The recently introduced problem of extending partial interval representations asks, for an interval graph with some intervals pre-drawn by the input, whether the partial representation can be extended to a representation of the entire graph. In this paper, we give a linear-time algorithm for extending proper interval representations and an almost quadratic-time algorithm for extending unit interval representations. #R##N#We also introduce the more general problem of bounded representations of unit interval graphs, where the input constrains the positions of some intervals by lower and upper bounds. We show that this problem is NP-complete for disconnected input graphs and give a polynomial-time algorithm for the special class of instances, where the ordering of the connected components of the input graph along the real line is prescribed. This includes the case of partial representation extension. #R##N#The hardness result sharply contrasts the recent polynomial-time algorithm for bounded representations of proper interval graphs [Balko et al. ISAAC'13]. So unless $\text{P} = \text{NP}$, proper and unit interval representations have vastly different structure. This explains why partial representation extension problems for these different types of representations require substantially different techniques.

Connected through hyperedge HE-1 (induced by source paper "circle graph isomorphism in almost linear time"):
  with members:
    - "testing isomorphism of circular arc graphs in polynomial time"
    - "the weisfeiler leman dimension of planar graphs is at most 3"
    - "deciding circular arc graph isomorphism in parameterized logspace"
    - "graph isomorphism restricted by lists"
    - "graph isomorphism in quasipolynomial time"
    - "completing orientations of partially oriented graphs"
    - "extending partial representations of interval graphs"
    - "extending partial representations of circle graphs"

Connected through hyperedge HE-2 (induced by source paper "simultaneous representation of proper and unit interval graphs"):
  with members:
    - "a note on simultaneous representation problem for interval and circular arc graphs"
    - "extending partial representations of circle graphs"
    - "simultaneous embedding of planar graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"
    - "simultaneous interval graphs"

Connected through hyperedge HE-3 (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-4 (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 subclasses of chordal graphs"
    - "extending partial representations of function graphs and permutation graphs"

Connected through hyperedge HE-5 (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 subclasses of chordal graphs"
    - "extending partial representations of function graphs and permutation graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"
    - "simultaneous interval graphs"

Connected through hyperedge HE-6 (induced by source paper "extending partial representations of subclasses of chordal graphs"):
  with members:
    - "bounded representations of interval and proper interval graphs"
    - "extending partial representations of interval graphs"
    - "extending partial representations of circle graphs"
    - "extending partial representations of function graphs and permutation graphs"
    - "simultaneous pq ordering with applications to constrained embedding problems"

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)