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 …
based on “fine-grained reductions” that focus on exact running times for problems …
Twin-width I: tractable FO model checking
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 …
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)
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 …
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 …
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
Two important similarity measures between sequences are the longest common
subsequence (LCS) and the dynamic time warping distance (DTWD). The computations of …
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
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 …
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 …
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 …
Many variants and extensions have been studied since Alt and Godau introduced this …
Parallel and distributed graph neural networks: An in-depth concurrency analysis
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 …
routinely solve complex problems on unstructured networks, such as node classification …
Approximation and fixed parameter subquadratic algorithms for radius and diameter in sparse graphs
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 …
for directed graphs. Each definition is well-motivated in a variety of applications. All versions …