Adam Smith
The Limits of Post-Selection Generalization
Jonathan Ullman, Adam Smith, Kobbi Nissim, Uri Stemmer, Thomas Steinke
Neural Information Processing Systems http://nips.cc/
Graph Oracle Models, Lower Bounds, and Gaps for Parallel Stochastic Optimization
Blake E. Woodworth, Jialei Wang, Adam Smith, Brendan McMahan, Nati Srebro
Neural Information Processing Systems http://nips.cc/
Graph Oracle Models, Lower Bounds, and Gaps for Parallel Stochastic Optimization
Blake E. Woodworth, Jialei Wang, Adam Smith, Brendan McMahan, Nati Srebro
We suggest a general oracle-based framework that captures different parallel stochastic optimization settings described by a dependency graph, and derive generic lower bounds in terms of this graph. We then use the framework and derive lower bounds for several specific parallel optimization settings, including delayed updates and parallel processing with intermittent communication. We highlight gaps between lower and upper bounds on the oracle complexity, and cases where the "natural" algorithms are not known to be optimal.