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: "linear time algorithm for partial representation extension of interval graphs"
  Abstract: Interval graphs are intersection graphs of closed intervals of the real-line. The well-known computational problem, called recognition, asks for an input graph $G$ whether it can be represented by closed intervals, i.e., whether G is an interval graph. There are several linear-time algorithms known for recognizing interval graphs. #R##N#In this paper, we study a generalization of recognition, called partial representation extension. Input of this problem consists of a graph G with a partial representation R' fixing positions of some intervals. The problem asks whether it is possible to place the remaining interval and create an interval representation R of the entire graph G extending R'. We give a linear-time algorithm based on PQ-trees which solves this problem.

Connected through hyperedge HE-1 (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"
    - "extending partial representations of proper and unit interval graphs"
    - "extending partial representations of subclasses of chordal graphs"
    - "extending partial representations of function graphs and permutation graphs"

Connected through hyperedge HE-2 (induced by source paper "bounded representations of interval and proper interval graphs"):
  with members:
    - "extending partial representations of circle graphs"
    - "extending partial representations of proper and unit interval 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-3 (induced by source paper "extending partial representations of proper and unit interval 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 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"

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)