Almost sure convergence rates of stochastic gradient methods under gradient domination
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Abstract (arXiv)
Stochastic gradient methods are among the most important algorithms in training machine learning problems. While classical assumptions such as strong convexity allow a simple analysis they are rarely satisfied in applications. In recent years, global and local gradient domination properties have shown to be a more realistic replacement of strong convexity. They were proved to hold in diverse settings such as (simple) policy gradient methods in reinforcement learning and training of deep neural networks with analytic activation functions. We prove almost sure convergence rates f(Xn)-f^*∈ obig( n^-frac14β-1+εbig) of the last iterate for stochastic gradient descent (with and without momentum) under global and local β-gradient domination assumptions. The almost sure rates get arbitrarily close to recent rates in expectation. Finally, we demonstrate how to apply our results to the training task in both supervised and reinforcement learning.
Key facts. Cited by 5 papers in the map (data through 7 Oct 2026). Builds on 38 of its 65 references that are in the map. First posted on arXiv 22 May 2024.
Builds on
38 of 65 references.
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