human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "polynomial bounds for the grid minor theorem"):
  Abstract: One of the key results in Robertson and Seymour's seminal work on graph minors is the Grid-Minor Theorem (also called the Excluded Grid Theorem). The theorem states that for every grid $H$, every graph whose treewidth is large enough relative to $|V(H)|$ contains $H$ as a minor. This theorem has found many applications in graph theory and algorithms. Let $f(k)$ denote the largest value such that every graph of treewidth $k$ contains a grid minor of size $(f(k)\times f(k))$. The best previous quantitative bound, due to recent work of Kawarabayashi and Kobayashi, and Leaf and Seymour, shows that $f(k)=\Omega(\sqrt{\log k/\log \log k})$. In contrast, the best known upper bound implies that $f(k) = O(\sqrt{k/\log k})$. In this paper we obtain the first polynomial relationship between treewidth and grid minor size by showing that $f(k)=\Omega(k^{\delta})$ for some fixed constant $\delta > 0$, and describe a randomized algorithm, whose running time is polynomial in $|V(G)|$ and $k$, that with high probability finds a model of such a grid minor in $G$.

Includes members:
  Member "degree 3 treewidth sparsifiers":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "towards tight er bounds for the excluded grid theorem")
  Member "maximum edge disjoint paths in k sums of graphs":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "new algorithms for maximum disjoint paths based on tree likeness")
  Member "large treewidth graph decompositions and applications":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "a deterministic algorithm for balanced cut with applications to dynamic connectivity flows and beyond")
  Member "a polylogarithimic approximation algorithm for edge disjoint paths with congestion 2":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "packing directed circuits quarter integrally")
  Member "routing in undirected graphs with constant congestion":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "an approximation algorithm for fully planar edge disjoint paths")
  Member "a graph reduction step preserving element connectivity and applications":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "characterizations of the connected forcing number of a graph")
  Member "on brambles grid like minors and parameterized intractability of monadic second order logic":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "model checking for successor invariant first order formulas on graph classes of bounded expansion")

Question: Please tell me which class the source paper 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.DS(Data Structures and Algorithms)