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: "a new efficient construction on probabilistic tree embeddings"
  Abstract: In this paper we describe a simple and efficient algorithm to construct FRT embeddings (optimal probabilistic tree embeddings) on graphs. For a graph with $n$ vertices and $m$ edges the algorithm runs in $O(m\log n+n\log^2 n)$ time. With the efficient FRT construction, we show that FRT trees are Ramsey partitions with asymptotically tight bound, and we give tighter bounds on coefficient than previous Ramsey partitions, hence improving other results on a series of distance oracles.

Connected through hyperedge HE-1 (induced by source paper "covering metric spaces by few trees"):
  with members:
    - "light spanners for high dimensional norms via stochastic decompositions"
    - "ramsey spanning trees and their applications"
    - "a linear size logarithmic stretch path reporting distance oracle for general graphs"
    - "a constructive proof of the general lovasz local lemma"
    - "ramsey partitions and proximity data structures"
    - "fast construction of nets in low dimensional metrics and their applications"
    - "embedding metrics into ultrametrics and graphs into spanning trees with constant average distortion"
    - "measured descent a new embedding method for finite metrics"

Connected through hyperedge HE-2 (induced by source paper "theoretically efficient parallel graph algorithms can be fast and scalable"):
  with members:
    - "single source bottleneck path algorithm faster than sorting for sparse graphs"
    - "local algorithms for hierarchical dense subgraph discovery"
    - "parallelism in randomized incremental algorithms"
    - "bigsparse high performance external graph analytics"
    - "implicit decomposition for write efficient connectivity algorithms"
    - "nearly work efficient parallel algorithm for digraph reachability"
    - "compressing graphs and indexes with recursive graph bisection"
    - "the gap benchmark suite"

Connected through hyperedge HE-3 (induced by source paper "ramsey spanning trees and their applications"):
  with members:
    - "the 4 3 additive spanner exponent is tight"
    - "approximate distance oracle with constant query time"
    - "approximate distance oracles with improved query time"
    - "ramsey partitions and proximity data structures"
    - "ramsey type theorems for metric spaces with applications to online problems"
    - "lower stretch spanning trees"

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)