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: "o log log rank competitive ratio for the matroid secretary problem"
  Abstract: In the \textit{Matroid Secretary Problem} (MSP), the elements of the ground set of a Matroid are revealed on-line one by one, each together with its value. An algorithm for the MSP is \textit{Matroid-Unknown} if, at every stage of its execution: (i) it only knows the elements that have been revealed so far and their values, and (ii) it has access to an oracle for testing whether or not any subset of the elements that have been revealed so far is an independent set. An algorithm is \textit{Known-Cardinality} if, in addition to (i) and (ii), it also initially knows the cardinality of the ground set of the Matroid. We present here a Known-Cardinality and \textit{Order-Oblivious} algorithm that, with constant probability, selects an independent set of elements, whose value is at least the optimal value divided by $O(\log{\log{\rho}})$, where $\rho$ is the rank of the Matroid; that is, the algorithm has a \textit{competitive-ratio} of $O(\log{\log{\rho}})$. The best previous results for a Known-Cardinality algorithm are a competitive-ratio of $O(\log{\rho})$, by Babaioff \textit{et al.} (2007), and a competitive-ratio of $O(\sqrt{\log{\rho}})$, by Chakraborty and Lachish (2012). In many non-trivial cases the algorithm we present has a competitive-ratio that is better than the $O(\log{\log{\rho}})$. The cases in which it fails to do so are easily characterized. Understanding these cases may lead to improved algorithms for the problem or, conversely, to non-trivial lower bounds.

Connected through hyperedge HE-1 (induced by source paper "submodular matroid secretary problem with shortlists"):
  with members:
    - "quasi polynomial algorithms for submodular tree orienteering and other directed network design problems"
    - "submodular streaming in all its glory tight approximation minimum memory and low adaptive complexity"
    - "submodular secretary problem with shortlists"
    - "do less get more streaming submodular maximization with subsampling"
    - "beyond 1 2 approximation for submodular maximization on massive data streams"
    - "a logarithmic integrality gap bound for directed steiner tree in quasi bipartite graphs"
    - "submodular secretary problems cardinality matching and linear constraints"
    - "streaming algorithms for submodular function maximization"

Connected through hyperedge HE-2 (induced by source paper "random order models"):
  with members:
    - "robust algorithms for the secretary problem"
    - "prophet secretary for combinatorial auctions and matroids"
    - "combinatorial prophet inequalities"
    - "beyond matroids secretary problem and prophet inequality with general constraints"
    - "secretary problems with non uniform arrival order"
    - "prophet inequalities with limited information"
    - "primal beats dual on online packing lps in the random order model"
    - "fast incremental and personalized pagerank"

Connected through hyperedge HE-3 (induced by source paper "robust algorithms for the secretary problem"):
  with members:
    - "near optimal online algorithms and fast approximation algorithms for resource allocation problems"
    - "stochastic bandits robust to adversarial corruptions"
    - "learning geometric concepts with nasty noise"
    - "learning from untrusted data"
    - "agnostic estimation of mean and covariance"
    - "robust estimators in high dimensions without the computational intractability"
    - "combinatorial prophet inequalities"
    - "beyond matroids secretary problem and prophet inequality with general constraints"

Connected through hyperedge HE-4 (induced by source paper "the outer limits of contention resolution on matroids and connections to the secretary problem"):
  with members:
    - "the prophet inequality can be solved optimally with a single set of samples"
    - "random order contention resolution schemes"
    - "optimal online contention resolution schemes via ex ante prophet inequalities"
    - "prophet secretary surpassing the 1 1 e barrier"
    - "prophet secretary for combinatorial auctions and matroids"
    - "beyond matroids secretary problem and prophet inequality with general constraints"
    - "online contention resolution schemes"
    - "a simple o log log mathrm rank competitive algorithm for the matroid secretary problem"

Connected through hyperedge HE-5 (induced by source paper "prophets secretaries and maximizing the probability of choosing the best"):
  with members:
    - "stochastic k server how should uber work"
    - "prophet secretary for combinatorial auctions and matroids"
    - "online matroid intersection beating half for random arrival"
    - "a simple o log log mathrm rank competitive algorithm for the matroid secretary problem"
    - "online independent set beyond the worst case secretaries prophets and periods"
    - "bayesian combinatorial auctions expanding single buyer mechanisms to many buyers"
    - "mechanism design via correlation gap"
    - "algorithms for secretary problems on graphs and hypergraphs"

Connected through hyperedge HE-6 (induced by source paper "how to hire secretaries with stochastic departures"):
  with members:
    - "online trading as a secretary problem"
    - "packing returning secretaries"
    - "improved approximations for free order prophets and second price auctions"
    - "prophet secretary surpassing the 1 1 e barrier"
    - "prophet secretary for combinatorial auctions and matroids"
    - "beyond matroids secretary problem and prophet inequality with general constraints"
    - "matroid prophet inequalities"

Connected through hyperedge HE-7 (induced by source paper "online pandora s boxes and bandits"):
  with members:
    - "descending price optimally coordinates search"
    - "prophet inequalities made easy stochastic optimization by pricing non stochastic inputs"
    - "a simple o log log mathrm rank competitive algorithm for the matroid secretary problem"
    - "matroid prophet inequalities"
    - "bayesian combinatorial auctions expanding single buyer mechanisms to many buyers"

Connected through hyperedge HE-8 (induced by source paper "strong algorithms for the ordinal matroid secretary problem"):
  with members:
    - "combinatorial secretary problems with ordinal information"
    - "combinatorial prophet inequalities"
    - "beyond matroids secretary problem and prophet inequality with general constraints"
    - "secretary problems with non uniform arrival order"
    - "the submodular secretary problem goes linear"
    - "a simple o log log mathrm rank competitive algorithm for the matroid secretary problem"
    - "prophet inequalities with limited information"
    - "polymatroid prophet inequalities"

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)