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: "optimizing scrip systems crashes altruists hoarders sybils and collusion"
  Abstract: Scrip, or artificial currency, is a useful tool for designing systems that are robust to selfish behavior by users. However, it also introduces problems for a system designer, such as how the amount of money in the system should be set. In this paper, the effect of varying the total amount of money in a scrip system on efficiency (i.e., social welfare---the total utility of all the agents in the system) is analyzed, and it is shown that by maintaining the appropriate ratio between the total amount of money and the number of agents, efficiency is maximized. This ratio can be found by increasing the money supply to just below the point that the system would experience a "monetary crash," where money is sufficiently devalued that no agent is willing to perform a service. The implications of the presence of altruists, hoarders, sybils, and collusion on the performance of the system are examined. Approaches are discussed to identify the strategies and types of agents.

Connected through hyperedge HE-1 (induced by source paper "infinite duration poorman bidding games"):
  with members:
    - "the efficiency of best response dynamics"
    - "all pay bidding games on graphs"
    - "determinacy in discrete bidding infinite duration games"
    - "quantitative analysis of smart contracts"
    - "infinite duration bidding games"
    - "bidding games and efficient allocations"
    - "sequential auctions of identical items with budget constrained bidders"
    - "on subgame perfection in quantitative reachability games"

Connected through hyperedge HE-2 (induced by source paper "infinite duration bidding games"):
  with members:
    - "determinacy in discrete bidding infinite duration games"
    - "infinite duration poorman bidding games"
    - "how much lookahead is needed to win infinite games"
    - "discrete all pay bidding games"
    - "non zero sum games for reactive synthesis"
    - "pure nash equilibria in concurrent deterministic games"
    - "variations on the stochastic shortest path problem"
    - "the odds of staying on budget"

Connected through hyperedge HE-3 (induced by source paper "decentralised norm monitoring in open multi agent systems"):
  with members:
    - "efficiency and nash equilibria in a scrip system for p2p networks"

Connected through hyperedge HE-4 (induced by source paper "an equilibrium analysis of scrip systems"):
  with members:
    - "mean field equilibrium in dynamic games with complementarities"
    - "manipulating scrip systems sybils and collusion"
    - "optimizing scrip systems efficiency crashes hoarders and altruists"
    - "efficiency and nash equilibria in a scrip system for p2p networks"
    - "random worlds and maximum entropy"

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.GT(Computer Science and Game Theory)