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: "an iterative on line auction mechanism for aggregated demand side participation"
  Abstract: This paper considers a demand-side aggregation scheme specifically for large numbers of small-loads, such as households and small- and medium-sized businesses. We introduce a novel auction format, called a staggered clock-proxy auction (SCPA), for on-line scheduling of these loads. This is a two phase format, consisting of a sequence of overlapping iterative ascending price clock auctions, one for each time-slot over a finite decision horizon, and a set of proxy auctions that begin at the termination of each individual clock auction, and which determine the final price and allocation for each time-slot. The overlapping design of the clock phases grant bidders the ability to effectively bid on intertemporal bundles of electricity use, thereby focusing on the most-relevant parts of the price-quantity space. Since electricity is a divisible good, the proxy auction uses demand-schedule bids, which the aggregator uses to compute a uniform-price competitive equilibrium for each time-slot. We show that, under mild assumptions on the bidders’ utilities functions, the proxy phase implements the Vickrey–Clarke–Groves allocation, which makes straightforward bidding in the proxy phase a Bayes–Nash equilibrium. Furthermore, we demonstrate the SCPA in a scenario comprised of household agents with three different utility function types, and show how the mechanism improves the efficiency of on-line energy use scheduling.

Connected through hyperedge HE-1 (induced by source paper "distributed bilevel energy allocation mechanism with grid constraints and hidden user information"):
  with members:
    - "a day ahead market energy auction for distribution system operation"
    - "distribution market clearing and settlement"
    - "prioritizing consumers in smart grid a game theoretic approach"
    - "a game theoretic approach to energy trading in the smart grid"

Connected through hyperedge HE-2 (induced by source paper "incentive compatibility scalability and privacy in real time demand response"):
  with members:
    - "a fast distributed algorithm for large scale demand response aggregation"
    - "efficiency loss in a network resource allocation game the case of elastic supply"

Connected through hyperedge HE-3 (induced by source paper "design of auction based approach for market clearing in peer to peer market platform"):
  with members:
    - "energy storage sharing in smart grid a modified auction based approach"

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.SY(Systems and Control)