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math.OC2022
Zeroth-Order Randomized Subspace Newton Methods
Erik Berglund, Sarit Khirirat, Xiaoyu Wang
Zeroth-order methods have become important tools for solving problems where we have access only to function evaluations. However, the zeroth-order methods only using gradient appro…
cs.LG2022★ 1 cited
On Uniform Boundedness Properties of SGD and its Momentum Variants
Xiaoyu Wang, Mikael Johansson
A theoretical, and potentially also practical, problem with stochastic gradient descent is that trajectories may escape to infinity. In this note, we investigate uniform boundednes…