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: "from hierarchical partitions to hierarchical covers optimal fault tolerant spanners for doubling metrics"
  Abstract: In this paper we devise an optimal construction of fault-tolerant spanners for doubling metrics. Specifically, for any $n$-point doubling metric, any $\eps > 0$, and any integer $0 \le k \le n-2$, our construction provides a $k$-fault-tolerant $(1+\eps)$-spanner with optimal degree $O(k)$ within optimal time $O(n \log n + k n)$. #R##N#We then strengthen this result to provide near-optimal (up to a factor of $\log k$) guarantees on the diameter and weight of our spanners, namely, diameter $O(\log n)$ and weight $O(k^2 + k \log n) \cdot \omega(MST)$, while preserving the optimal guarantees on the degree $O(k)$ and the running time $O(n \log n + k n)$. #R##N#Our result settles several fundamental open questions in this area, culminating a long line of research that started with the STOC'95 paper of Arya et al.\ and the STOC'98 paper of Levcopoulos et al. #R##N#On the way to this result we develop a new technique for constructing spanners in doubling metrics. Our spanner construction is based on a novel \emph{hierarchical cover} of the metric, whereas most previous constructions of spanners for doubling and Euclidean metrics (such as the net-tree spanner) are based on \emph{hierarchical partitions} of the metric. We demonstrate the power of hierarchical covers in the context of geometric spanners by improving the state-of-the-art results in this area.

Connected through hyperedge HE-1 (induced by source paper "truly optimal euclidean spanners"):
  with members:
    - "on the spanning and routing ratio of theta four"
    - "odd yao yao graphs are not spanners"
    - "greedy spanners are optimal in doubling metrics"
    - "minor free graphs have light spanners"
    - "the greedy spanner is existentially optimal"
    - "almost all even yao yao graphs are spanners"
    - "a light metric spanner"
    - "upper bounds on the spanning ratio of constrained theta graphs"

Connected through hyperedge HE-2 (induced by source paper "varepsilon coresets for clustering with outliers in doubling metrics"):
  with members:
    - "turning big data into tiny data constant size coresets for k means pca and projective clustering"
    - "clustering high dimensional dynamic data streams"
    - "coresets and sketches"
    - "a ptas for the steiner forest problem in doubling metrics"
    - "new frameworks for offline and streaming coreset constructions"
    - "local search yields a ptas for k means in doubling metrics"
    - "the traveling salesman problem low dimensionality implies a polynomial time approximation scheme"
    - "a unified framework for approximating and clustering data"

Connected through hyperedge HE-3 (induced by source paper "on locality sensitive orderings and their applications"):
  with members:
    - "faster fully dynamic minimum spanning forest"
    - "efficient construction of spanners in d dimensions"
    - "fast construction of nets in low dimensional metrics and their applications"

Connected through hyperedge HE-4 (induced by source paper "optimal vertex fault tolerant spanners for fixed stretch"):
  with members:
    - "preserving distances in very faulty graphs"
    - "connectivity oracles for graphs subject to vertex failures"
    - "multiple edge fault tolerant approximate shortest path trees"
    - "improved distance sensitivity oracles via tree partitioning"
    - "compact and fast sensitivity oracles for single source distances"
    - "dual failure resilient bfs structure"
    - "improved purely additive fault tolerant spanners"
    - "fault tolerant approximate shortest path trees"

Connected through hyperedge HE-5 (induced by source paper "fault tolerant additive weighted geometric spanners"):
  with members:
    - "on plane constrained bounded degree spanners"
    - "efficient construction of spanners in d dimensions"
    - "bounded degree planar geometric spanners"
    - "spanners of additively weighted point sets"
    - "geometric spanners with small chromatic number"
    - "sparse geometric graphs with small dilation"
    - "fast construction of nets in low dimensional metrics and their applications"

Connected through hyperedge HE-6 (induced by source paper "the minimum edge compact spanner network design problem"):
  with members:
    - "graph measures and network robustness"
    - "fault tolerant spanners for doubling metrics better and simpler"
    - "robust geometric spanners"
    - "fault tolerant spanners better and simpler"

Connected through hyperedge HE-7 (induced by source paper "the greedy spanner is existentially optimal"):
  with members:
    - "on notions of distortion and an almost minimum spanning tree with constant average distortion"
    - "a light metric spanner"
    - "fast constructions of light weight spanners for general graphs"
    - "light spanners in bounded pathwidth graphs"
    - "fast construction of nets in low dimensional metrics and their applications"

Connected through hyperedge HE-8 (induced by source paper "a light metric spanner"):
  with members:
    - "the traveling salesman problem low dimensionality implies a polynomial time approximation scheme"
    - "light spanners for snowflake metrics"
    - "optimal euclidean spanners really short thin and lanky"
    - "light spanners in bounded pathwidth graphs"
    - "efficient regression in metric spaces via approximate lipschitz extension"
    - "shallow low and light trees and tight lower bounds for euclidean spanners"
    - "fast construction of nets in low dimensional metrics and their applications"

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.DS(Data Structures and Algorithms)