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 …

Stronger 3-sum lower bounds for approximate distance oracles via additive combinatorics

A Abboud, K Bringmann, N Fischer - Proceedings of the 55th Annual …, 2023 - dl.acm.org
The “short cycle removal” technique was recently introduced by Abboud, Bringmann, Khoury
and Zamir (STOC'22) to prove fine-grained hardness of approximation. Its main technical …

Fully dynamic maximal matching in constant update time

S Solomon - 2016 IEEE 57th Annual Symposium on …, 2016 - ieeexplore.ieee.org
Baswana, Gupta and Sen [FOCS'11] showed that fully dynamic maximal matching can be
maintained in general graphs with logarithmic amortized update time. More specifically …

Deterministic decremental reachability, scc, and shortest paths via directed expanders and congestion balancing

A Bernstein, MP Gutenberg… - 2020 IEEE 61st Annual …, 2020 - ieeexplore.ieee.org
Let G=(V, E, w) be a weighted, directed graph subject to a sequence of adversarial edge
deletions. In the decremental single-source reachability problem (SSR), we are given a fixed …

Hardness of approximation in P via short cycle removal: cycle detection, distance oracles, and beyond

A Abboud, K Bringmann, S Khoury… - Proceedings of the 54th …, 2022 - dl.acm.org
We present a new technique for efficiently removing almost all short cycles in a graph
without unintentionally removing its triangles. Consequently, triangle finding problems do …

Matching triangles and basing hardness on an extremely popular conjecture

A Abboud, V Vassilevska Williams, H Yu - Proceedings of the forty …, 2015 - dl.acm.org
Due to the lack of unconditional polynomial lower bounds, it is now in fashion to prove
conditional lower bounds in order to advance our understanding of the class P. The vast …

Rounding dynamic matchings against an adaptive adversary

D Wajc - Proceedings of the 52nd Annual ACM SIGACT …, 2020 - dl.acm.org
We present a new dynamic matching sparsification scheme. From this scheme we derive a
framework for dynamically rounding fractional matchings against adaptive adversaries …

New deterministic approximation algorithms for fully dynamic matching

S Bhattacharya, M Henzinger… - Proceedings of the forty …, 2016 - dl.acm.org
We present two deterministic dynamic algorithms for the maximum matching problem.(1) An
algorithm that maintains a (2+ є)-approximate maximum matching in general graphs with O …

Dynamic matching with better-than-2 approximation in polylogarithmic update time

S Bhattacharya, P Kiss, T Saranurak, D Wajc - … of the 2023 Annual ACM-SIAM …, 2023 - SIAM
We present dynamic algorithms with polylogarithmic update time for estimating the size of
the maximum matching of a graph undergoing edge insertions and deletions with …

Distributed PCP theorems for hardness of approximation in P

A Abboud, A Rubinstein… - 2017 IEEE 58th Annual …, 2017 - ieeexplore.ieee.org
We present a new distributed model of probabilistically checkable proofs (PCP). A satisfying
assignment x∈{0, 1} n to a CNF formula φ is shared between two parties, where Alice …