TV-HSGT couples hybrid variance-reduced stochastic gradients with AB gradient tracking to obtain a dynamic regret bound over time-varying directed networks without assuming bounded gradients.
Distributed stochastic optimization with gradient track- ing over time- varying directed networks
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A Hybrid Stochastic Gradient Tracking Method for Distributed Online Optimization Over Time-Varying Directed Networks
TV-HSGT couples hybrid variance-reduced stochastic gradients with AB gradient tracking to obtain a dynamic regret bound over time-varying directed networks without assuming bounded gradients.