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: "hitting minors subdivisions and immersions in tournaments"
  Abstract: The Erd\H{o}s-P\'osa property relates parameters of covering and packing of#N#combinatorial structures and has been mostly studied in the setting of#N#undirected graphs. In this note, we use results of Chudnovsky, Fradkin, Kim,#N#and Seymour to show that, for every directed graph $H$ (resp.#N#strongly-connected directed graph $H$), the class of directed graphs that#N#contain $H$ as a strong minor (resp. butterfly minor, topological minor) has#N#the vertex-Erd\H{o}s-P\'osa property in the class of tournaments. We also prove#N#that if $H$ is a strongly-connected directed graph, the class of directed#N#graphs containing $H$ as an immersion has the edge-Erd\H{o}s-P\'osa property in#N#the class of tournaments.

Connected through hyperedge HE-1 (induced by source paper "recent techniques and results on the erd h o s p osa property"):
  with members:
    - "linear kernels for edge deletion problems to immersion closed graph classes"
    - "approximation and kernelization for chordal vertex deletion"
    - "an o log opt approximation for covering and packing minor models of theta _r"
    - "an exact characterization of tractable demand patterns for maximum disjoint path problems"
    - "large treewidth graph decompositions and applications"
    - "polynomial bounds for the grid minor theorem"
    - "polynomial gap extensions of the erd h o s p osa theorem"

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)