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: "max point tolerance graphs"
  Abstract: A graph G is a max point-tolerance (MPT)graph if each vertex v of G can be mapped to a pointed-interval (Iv, pv) where Iv is an interval ofR and pv ∈ Iv such that uv is an edge of G iff Iu∩ Iv ⊇ {pu, pv}. MPT graphs model relationships among DNA fragments in genome-wide association studies as well as basic transmission problems in telecommunications. We formally introduce this graph class, characterize it, study combinatorial optimization problems on it, and relate it to several well known graph classes. We characterize MPT graphs as a special case of several 2D geometric intersection graphs; namely, triangle, rectangle, L-shape, and line segment intersection graphs. We further characterize MPT as having certain linear orders on their vertex set. Our last characterizatio n is that MPT graphs are precisely obtained by intersecting special pairs of interval graphs. We also show that, on MPT graphs, the maximum weight independent set problem can be solved in polynomial time, the coloring problem is NP-complete, and the clique cover problem has a 2-approximation. Finally, we demonstrate several connections to known graph classes; e.g., MPT graphs strictly contain interval graphs and outerplanar graphs, but are incomparable to permutation, chordal, and planar graphs.

Connected through hyperedge HE-1 (induced by source paper "recognizing stick graphs with and without length constraints"):
  with members:
    - "recognition and drawing of stick graphs"
    - "intersection graphs of rays and grounded segments"
    - "on the classes of interval graphs of limited nesting and count of lengths"

Connected through hyperedge HE-2 (induced by source paper "stick graphs with length constraints"):
  with members:
    - "recognition and drawing of stick graphs"
    - "intersection graphs of rays and grounded segments"
    - "on the classes of interval graphs of limited nesting and count of lengths"
    - "intersection graphs of segments and exists mathbb r"

Connected through hyperedge HE-3 (induced by source paper "approximating dominating set on intersection graphs of rectangles and l frames"):
  with members:
    - "geometric dominating set and set cover via local search"
    - "the hardness of approximation of euclidean k means"
    - "independent and hitting sets of rectangles intersecting a diagonal line algorithms and complexity"
    - "analytical approach to parallel repetition"
    - "approximation algorithms for maximum independent set of pseudo disks"

Connected through hyperedge HE-4 (induced by source paper "recognition and drawing of stick graphs"):
  with members:
    - "stick graphs with length constraints"
    - "intersection graphs of rays and grounded segments"
    - "ordering without forbidden patterns"

Connected through hyperedge HE-5 (induced by source paper "planar graphs as l intersection or l contact graphs"):
  with members:
    - "the 3 1 ordering for 4 connected planar triangulations"

Connected through hyperedge HE-6 (induced by source paper "independent and hitting sets of rectangles intersecting a diagonal line algorithms and complexity"):
  with members:
    - "matching colored points with rectangles"
    - "c and a new graph model"
    - "approximation schemes for maximum weight independent set of rectangles"
    - "approximation algorithms for maximum independent set of pseudo disks"
    - "the problem of compatible representatives"

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)