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: "polynomial kernels for 3 leaf power graph modification problems"
  Abstract: A graph G = (V,E) is a 3-leaf power iff there exists a tree T the leaf set of which is V and such that (u,v) ? E iff u and v are at distance at most 3 in T. The 3-leaf power edge modification problems, i.e. edition (also known as the Closest 3-Leaf Power), completion and edge-deletion are FPT when parameterized by the size of the edge set modification. However, a polynomial kernel was known for none of these three problems. For each of them, we provide a kernel with O(k 3) vertices that can be computed in linear time. We thereby answer an open question first mentioned by Dom, Guo, Huffner and Niedermeier [9].

Connected through hyperedge HE-1 (induced by source paper "a polynomial kernel for 3 leaf power deletion"):
  with members:
    - "feedback vertex set inspired kernel for chordal vertex deletion"
    - "approximation and kernelization for chordal vertex deletion"
    - "a single exponential fixed parameter algorithm for distance hereditary vertex deletion"
    - "a polynomial kernel for block graph deletion"
    - "chordal editing is fixed parameter tractable"
    - "vertex cover kernelization revisited upper and lower bounds for a refined parameter"

Connected through hyperedge HE-2 (induced by source paper "polynomial time recognition of 4 steiner powers"):
  with members:
    - "fast approximation of centrality and distances in hyperbolic graphs"
    - "parameterized leaf power recognition via embedding into graph products"
    - "towards a characterization of leaf powers by clique arrangements"
    - "scaling algorithms for weighted matching in general graphs"
    - "structure and recognition of 3 4 leaf powers of galled phylogenetic networks in polynomial time"

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"
    - "forbidden induced subgraphs of normal helly circular arc graphs characterization and detection"
    - "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"

Connected through hyperedge HE-4 (induced by source paper "polynomial kernels for proper interval completion and related problems"):
  with members:
    - "on the non existence of polynomial kernels for p l free edge 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)