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: "forbidden induced subgraphs of normal helly circular arc graphs characterization and detection"
  Abstract: A normal Helly circular-arc graph is the intersection graph of arcs on a circle of which no three or less arcs cover the whole circle. Lin, Soulignac, and Szwarcfiter [Discrete Appl. Math. 2013] characterized circular-arc graphs that are not normal Helly circular-arc graphs, and used it to develop the first recognition algorithm for this graph class. As open problems, they ask for the forbidden induced subgraph characterization and a direct recognition algorithm for normal Helly circular-arc graphs, both of which are resolved by the current paper. Moreover, when the input is not a normal Helly circular-arc graph, our recognition algorithm finds in linear time a minimal forbidden induced subgraph as certificate.

Connected through hyperedge HE-1 (induced by source paper "canonical representations for circular arc graphs using flip sets"):
  with members:
    - "deciding circular arc graph isomorphism in parameterized logspace"
    - "isomorphism of graph classes related to the circular ones property"

Connected through hyperedge HE-2 (induced by source paper "unit interval editing is fixed parameter tractable"):
  with members:
    - "unit interval vertex deletion fewer vertices are relevant"
    - "linear recognition of almost interval graphs"
    - "chordal editing is fixed parameter tractable"
    - "a subexponential parameterized algorithm for proper interval completion"
    - "normal helly circular arc graphs and its subclasses"
    - "a polynomial kernel for proper interval vertex deletion"
    - "finding small separators in linear time via treewidth reduction"
    - "polynomial kernels for proper interval completion and related problems"

Connected through hyperedge HE-3 (induced by source paper "linear recognition of almost interval graphs"):
  with members:
    - "a faster algorithm to recognize even hole free graphs"
    - "faster algorithms for vertex partitioning problems parameterized by clique width"
    - "chordal editing is fixed parameter tractable"
    - "a subexponential parameterized algorithm for interval completion"
    - "normal helly circular arc graphs and its subclasses"
    - "exploring subexponential parameterized complexity of completion problems"
    - "interval deletion is fixed parameter tractable"
    - "polynomial kernels for 3 leaf power graph modification 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)