On some fine-grained questions in algorithms and complexity

VV Williams - Proceedings of the international congress of …, 2018 - World Scientific
In recent years, a new “fine-grained” theory of computational hardness has been developed,
based on “fine-grained reductions” that focus on exact running times for problems …

Twin-width I: tractable FO model checking

É Bonnet, EJ Kim, S Thomassé… - ACM Journal of the ACM …, 2021 - dl.acm.org
Inspired by a width invariant defined on permutations by Guillemot and Marx [SODA'14], we
introduce the notion of twin-width on graphs and on matrices. Proper minor-closed classes …

Edit distance cannot be computed in strongly subquadratic time (unless SETH is false)

A Backurs, P Indyk - Proceedings of the forty-seventh annual ACM …, 2015 - dl.acm.org
The edit distance (aka the Levenshtein distance) between two strings is defined as the
minimum number of insertions, deletions or substitutions of symbols needed to transform …

Popular conjectures imply strong lower bounds for dynamic problems

A Abboud, VV Williams - 2014 IEEE 55th Annual Symposium …, 2014 - ieeexplore.ieee.org
We consider several well-studied problems in dynamic algorithms and prove that sufficient
progress on any of them would imply a breakthrough on one of five major open problems in …

Tight hardness results for LCS and other sequence similarity measures

A Abboud, A Backurs… - 2015 IEEE 56th Annual …, 2015 - ieeexplore.ieee.org
Two important similarity measures between sequences are the longest common
subsequence (LCS) and the dynamic time warping distance (DTWD). The computations of …

Bypass exponential time preprocessing: Fast neural network training via weight-data correlation preprocessing

J Alman, Z Song, R Zhang… - Advances in Neural …, 2024 - proceedings.neurips.cc
Over the last decade, deep neural networks have transformed our society, and they are
already widely applied in various machine learning applications. State-of-the-art deep …

Quadratic conditional lower bounds for string problems and dynamic time warping

K Bringmann, M Künnemann - 2015 IEEE 56th Annual …, 2015 - ieeexplore.ieee.org
Classic similarity measures of strings are longest common subsequence and Levenshtein
distance (ie, The classic edit distance). A classic similarity measure of curves is dynamic …

Why walking the dog takes time: Frechet distance has no strongly subquadratic algorithms unless SETH fails

K Bringmann - 2014 IEEE 55th Annual Symposium on …, 2014 - ieeexplore.ieee.org
The Fréchet distance is a well-studied and very popular measure of similarity of two curves.
Many variants and extensions have been studied since Alt and Godau introduced this …

Parallel and distributed graph neural networks: An in-depth concurrency analysis

M Besta, T Hoefler - IEEE Transactions on Pattern Analysis and …, 2024 - ieeexplore.ieee.org
Graph neural networks (GNNs) are among the most powerful tools in deep learning. They
routinely solve complex problems on unstructured networks, such as node classification …

Approximation and fixed parameter subquadratic algorithms for radius and diameter in sparse graphs

A Abboud, VV Williams, J Wang - Proceedings of the twenty-seventh annual …, 2016 - SIAM
The radius and diameter are fundamental graph parameters, with several natural definitions
for directed graphs. Each definition is well-motivated in a variety of applications. All versions …