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: "optimal control of two player systems with output feedback"
  Abstract: In this article, we consider a fundamental decentralized optimal control problem, which we call the two-player problem. Two subsystems are interconnected in a nested information pattern, and output feedback controllers must be designed for each subsystem. Several special cases of this architecture have previously been solved, such as the state-feedback case or the case where the dynamics of both systems are decoupled. In this paper, we present a detailed solution to the general case. The structure of the optimal decentralized controller is reminiscent of that of the optimal centralized controller; each player must estimate the state of the system given their available information and apply static control policies to these estimates to compute the optimal controller. The previously solved cases benefit from a separation between estimation and control that allows the associated gains to be computed separately. This feature is not present in general, and some of the gains must be solved for simultaneously. We show that computing the required coupled estimation and control gains amounts to solving a small system of linear equations.

Connected through hyperedge HE-1 (induced by source paper "team optimal decentralized state estimation of linear stochastic processes by agents with non classical information structures"):
  with members:
    - "decentralized stochastic control with partial history sharing a common information approach"
    - "optimal distributed controller design with communication delays application to vehicle formations"

Connected through hyperedge HE-2 (induced by source paper "learning from my partner s actions roles in decentralized robot teams"):
  with members:
    - "decentralization of multiagent policies by learning what to communicate"
    - "fully decentralized policies for multi agent systems an information theoretic approach"
    - "multi agent actor critic for mixed cooperative competitive environments"
    - "cooperative inverse reinforcement learning"
    - "learning to communicate with deep multi agent reinforcement learning"
    - "learning multiagent communication with backpropagation"
    - "planning for decentralized control of multiple robots under uncertainty"
    - "decentralized stochastic control with partial history sharing a common information approach"

Connected through hyperedge HE-3 (induced by source paper "explicit agent level optimal cooperative controllers for dynamically decoupled systems with output feedback"):
  with members:
    - "optimal decentralized state feedback control with sparsity and delays"

Connected through hyperedge HE-4 (induced by source paper "optimal infinite horizon decentralized networked controllers with unreliable communication"):
  with members:
    - "optimal local and remote controllers with unreliable uplink channels"
    - "dynamic teams and decentralized control problems with substitutable actions"
    - "optimal local and remote controllers with unreliable communication"
    - "decentralized control problems with substitutable actions"
    - "optimal control for lqg systems on graphs part i structural results"
    - "optimal decentralized state feedback control with sparsity and delays"
    - "distributed output feedback lqg control with delayed information sharing"
    - "decentralized stochastic control with partial history sharing a common information approach"

Connected through hyperedge HE-5 (induced by source paper "decentralized control of stochastically switched linear system with unreliable communication"):
  with members:
    - "optimal local and remote controllers with unreliable uplink channels"
    - "dynamic teams and decentralized control problems with substitutable actions"
    - "optimal local and remote controllers with unreliable communication"
    - "decentralized control problems with substitutable actions"
    - "structural results and explicit solution for two player lqg systems on a finite time horizon"
    - "decentralized stochastic control with partial history sharing a common information approach"

Connected through hyperedge HE-6 (induced by source paper "optimal local and remote controllers with unreliable uplink channels"):
  with members:
    - "dynamic teams and decentralized control problems with substitutable actions"
    - "optimal local and remote controllers with unreliable communication"
    - "decentralized control problems with substitutable actions"
    - "structural results and explicit solution for two player lqg systems on a finite time horizon"
    - "decentralized stochastic control with partial history sharing a common information approach"
    - "optimal strategies for communication and remote estimation with an energy harvesting sensor"
    - "optimal decentralized control of coupled subsystems with control sharing"

Connected through hyperedge HE-7 (induced by source paper "team optimal decentralized control of system with partially exchangeable agents part 1 linear quadratic mean field teams"):
  with members:
    - "decentralized control problems with substitutable actions"
    - "the iso problem decentralized stochastic control via bidding schemes"
    - "signaling for decentralized routing in a queueing network"
    - "distributed control with low rank coordination"
    - "the complexity of decentralized control of markov decision processes"

Connected through hyperedge HE-8 (induced by source paper "optimal local and remote controllers with unreliable communication"):
  with members:
    - "decentralized control problems with substitutable actions"
    - "structural results and explicit solution for two player lqg systems on a finite time horizon"
    - "decentralized stochastic control with partial history sharing a common information approach"
    - "optimal strategies for communication and remote estimation with an energy harvesting sensor"

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)