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Gradient Flossing: Improving Gradient Descent through Dynamic Control of Jacobians

Neural Information Processing Systems

Training recurrent neural networks (RNNs) remains a challenge due to the instability of gradients across long time horizons, which can lead to exploding and vanishing gradients. Recent research has linked these problems to the values of Lyapunov exponents for the forward-dynamics, which describe the growth or shrinkage of infinitesimal perturbations. Here, we propose gradient flossing, a novel approach to tackling gradient instability by pushing Lyapunov exponents of the forward dynamics toward zero during learning.


Gradient Flossing: Improving Gradient Descent through Dynamic Control of Jacobians

Neural Information Processing Systems

Training recurrent neural networks (RNNs) remains a challenge due to the instability of gradients across long time horizons, which can lead to exploding and vanishing gradients. Recent research has linked these problems to the values of Lyapunov exponents for the forward-dynamics, which describe the growth or shrinkage of infinitesimal perturbations. Here, we propose gradient flossing, a novel approach to tackling gradient instability by pushing Lyapunov exponents of the forward dynamics toward zero during learning.



Value Function Decompositionfor Iterative Designof Reinforcement Learning Agents

Neural Information Processing Systems

In BW, an include: areforwardprogress, failur ), acostcontr ), ashapingrehead). Require:Experience B; twinQ-function 1, 2 (with parameters 1, 2; policyparameter ; discount ; entrop ; learningrates q, ; targetnetw ; Boolean 1: Sampletransition(s, a, r,0) B.r2Rm is 2: Samplepolica0 ( |s0; )andu ( |s; ) 3: rm+1 log (a0|s0; ).Extend 4: j argmin