human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge groups papers that share a common citing paper.

Details of the hypergraph:
Center hyperedge (induced by source paper ""UNIVERSAL" CONSTRUCTION OF ARTSTEIN'S THEOREM ON NONLINEAR STABILIZATION 1"):
  Abstract: Report SYCON-89-03 ABSTRACT This note presents an explicit proof of the theorem -due to Artstein- which states that the existence of a smooth control-Lyapunov function implies smooth stabilizability. More- over, the result is extended to the real-analytic and rational cases as well. The proof uses a "universal" formula given by an algebraic function of Lie derivatives; this formula originates in the solution of a simple Riccati equation.

Includes members:
  Member "FEEDBACK STABILIZATION OF NONLINEAR SYSTEMS":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "FEEDBACK STABILIZATION USING TWO-HIDDEN-LAYER NETS")
  Member "Asymptotic Controllability Implies Feedback Stabilization":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "A REMARK ON ROBUST STABILIZATION OF GENERAL ASYMPTOTICALLY CONTROLLABLE SYSTEMS")
  Member "GENERAL CLASSES OF CONTROL-LYAPUNOV FUNCTIONS":
    also connected through other hyperedges:
      (none)

Question: Please tell me which class the citing paper (i.e., the source paper of the center hyperedge) belongs to. The 7 classes are: Neural_Networks, Reinforcement_Learning, Probabilistic_Methods, Theory, Genetic_Algorithms, Case_Based, Rule_Learning. Directly output the class name.

gpt: Neural_Networks