human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent groups of papers sharing a common citing paper.

Details of the hypergraph:
Center node: "New Characterizations of Input to State Stability"
  Abstract: We present new characterizations of the Input to State Stability property. As a consequence of these results, we show the equivalence between the ISS property and several (apparent) variations proposed in the literature.

Connected through hyperedge HE-1 (induced by source paper "A Smooth Converse Lyapunov Theorem for Robust Stability"):
  with members:
    - "A Characterization of Integral Input to State Stability"

Connected through hyperedge HE-2 (induced by source paper "Global Stabilization of Linear Discrete-Time Systems with Bounded Feedback"):
  with members:
    - "j"
    - "On Finite Gain Stabilizability of Linear Systems Subject to Input Saturation"
    - "Avoiding Saturation By Trajectory Reparameterization"
    - "STABILIZATION WITH SATURATED ACTUATORS, A WORKED EXAMPLE:F-8 LONGITUDINAL FLIGHT CONTROL"

Connected through hyperedge HE-3 (induced by source paper "A Characterization of Integral Input to State Stability"):
  with members:
    - "A Smooth Converse Lyapunov Theorem for Robust Stability"
    - "FURTHER FACTS ABOUT INPUT TO STATE STABILIZATION "Further facts about input to state stabilization", IEEE"

Connected through hyperedge HE-4 (induced by source paper "On Finite Gain Stabilizability of Linear Systems Subject to Input Saturation"):
  with members:
    - "Global Stabilization of Linear Discrete-Time Systems with Bounded Feedback"
    - "References Linear Controller Design, Limits of Performance, "The parallel projection operators of a nonlinear feedback"

Connected through hyperedge HE-5 (induced by source paper "Changing Supply Functions in Input/State Stable Systems"):
  with members:
    (none)

Connected through hyperedge HE-6 (induced by source paper "FURTHER FACTS ABOUT INPUT TO STATE STABILIZATION "Further facts about input to state stabilization", IEEE"):
  with members:
    - "A Characterization of Integral Input to State Stability"
    - "FEEDBACK STABILIZATION OF NONLINEAR SYSTEMS"

Question: Please tell me which class the center node 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