Seminar • Algorithms and Complexity • Worst-Case to Average-Case Reductions via Additive CombinatoricsExport this event to calendar

Wednesday, April 27, 2022 — 1:00 PM EDT

Please note: This seminar will be given online.

Vahid Asadi, PhD candidate
David R. Cheriton School of Computer Science

We present a new framework for designing worst-case to average-case reductions. For a large class of problems, it provides an explicit transformation of algorithms running in time T that are only correct on a small (subconstant) fraction of their inputs into algorithms running in time O(T \log T) that are correct on all inputs.

Using our framework, we obtain such efficient worst-case to average-case reductions for fundamental problems in a variety of computational models; namely, algorithms for matrix multiplication, streaming algorithms for the online matrix-vector multiplication problem, and static data structures for all linear problems as well as for the multivariate polynomial evaluation problem.

Our techniques crucially rely on additive combinatorics. In particular, we show a local correction lemma that relies on a new probabilistic version of the quasi-polynomial Bogolyubov-Ruzsa lemma.

This work is joint with Alexander Golovnev, Tom Gur, and Igor Shinkar (to be presented at STOC ’22).


To join this seminar on Zoom, please go to https://uwaterloo.zoom.us/j/91617647329?pwd=VmlNTDZYODRWSlpDeVdHODJSdUtqdz09.

Location 
Online seminar
200 University Avenue West

Waterloo, ON N2L 3G1
Canada
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