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: "local approximation schemes for topology control"
  Abstract: This paper presents a distributed algorithm on wireless ad-hoc networks that runs in polylogarithmic number of rounds in the size of the network and constructs a linear size, lightweight, (1+\epsilon)-spanner for any given \epsilon > 0. A wireless network is modeled by a d-dimensional \alpha-quasi unit ball graph (\alpha-UBG), which is a higher dimensional generalization of the standard unit disk graph (UDG) model. The d-dimensional \alpha-UBG model goes beyond the unrealistic ``flat world'' assumption of UDGs and also takes into account transmission errors, fading signal strength, and physical obstructions. The main result in the paper is this: for any fixed \epsilon > 0, 0 < \alpha \le 1, and d \ge 2, there is a distributed algorithm running in O(\log n \log^* n) communication rounds on an n-node, d-dimensional \alpha-UBG G that computes a (1+\epsilon)-spanner G' of G with maximum degree \Delta(G') = O(1) and total weight w(G') = O(w(MST(G)). This result is motivated by the topology control problem in wireless ad-hoc networks and improves on existing topology control algorithms along several dimensions. The technical contributions of the paper include a new, sequential, greedy algorithm with relaxed edge ordering and lazy updating, and clustering techniques for filtering out unnecessary edges.

Connected through hyperedge HE-1 (induced by source paper "bounding interference in wireless ad hoc networks with nodes in random position"):
  with members:
    - "a note on interference in random point sets"
    - "minimizing interference in ad hoc networks with bounded communication radius"
    - "a tight bound on the maximum interference of random sensors in the highway model"
    - "minimizing the maximum interference is hard"

Connected through hyperedge HE-2 (induced by source paper "the mst of symmetric disk graphs in arbitrary metrics is light"):
  with members:
    - "relaxed spanners for directed disk graphs"
    - "low degree spanning trees of small weight"

Connected through hyperedge HE-3 (induced by source paper "a new distributed topology control algorithm for wireless environments with non uniform path loss and multipath propagation"):
  with members:
    - "minimum energy mobile wireless networks revisited"

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)