Deterministic min-cut in poly-logarithmic max-flows

J Li, D Panigrahi - 2020 IEEE 61st Annual Symposium on …, 2020 - ieeexplore.ieee.org
We give a deterministic (global) min-cut algorithm for weighted undirected graphs that runs
in time O (m 1+ ε) plus polylog (n) max-flow computations. Using the current best max-flow …

Breaking the cubic barrier for all-pairs max-flow: Gomory-hu tree in nearly quadratic time

A Abboud, R Krauthgamer, J Li… - 2022 IEEE 63rd …, 2022 - ieeexplore.ieee.org
In 1961, Gomory and Hu showed that the All-Pairs Max-Flow problem of computing the max-
flow between all n\2 pairs of vertices in an undirected graph can be solved using only n-1 …

Nearly optimal communication and query complexity of bipartite matching

J Blikstad, J Van Den Brand, Y Efron… - 2022 IEEE 63rd …, 2022 - ieeexplore.ieee.org
We settle the complexities of the maximum-cardinality bipartite matching problem (BMM) up
to polylogarithmic factors in five models of computation: the two-party communication, AND …

Cut query algorithms with star contraction

S Apers, Y Efron, P Gawrychowski… - 2022 IEEE 63rd …, 2022 - ieeexplore.ieee.org
We study the complexity of determining the edge connectivity of a simple graph with cut
queries. We show that (i) there is a bounded-error randomized algorithm that computes …

Friendly cut sparsifiers and faster Gomory-Hu trees

A Abboud, R Krauthgamer, O Trabelsi - Proceedings of the 2022 Annual ACM …, 2022 - SIAM
We devise new cut sparsifiers that are related to the classical sparsification of Nagamochi
and Ibaraki [Algorithmica, 1992], which is an algorithm that, given an unweighted graph G on …

Near-linear time approximations for cut problems via fair cuts

J Li, D Nanongkai, D Panigrahi, T Saranurak - … of the 2023 Annual ACM-SIAM …, 2023 - SIAM
We introduce the notion of fair cuts as an approach to leverage approximate (s, t)-mincut
(equivalently (s, t)-maxflow) algorithms in undirected graphs to obtain near-linear time …

Fixed-Parameter Tractability of Hedge Cut

FV Fomin, PA Golovach, T Korhonen… - Proceedings of the 2025 …, 2025 - SIAM
Abstract In the Hedge Cut problem, the edges of a graph are partitioned into groups called
hedges, and the question is what is the minimum number of hedges to delete to disconnect …

Learning Spanning Forests Optimally in Weighted Undirected Graphs with CUT queries

H Liao, D Chakrabarty - International Conference on …, 2024 - proceedings.mlr.press
In this paper we describe a randomized algorithm which returns a maximal spanning forest
of an unknown {\em weighted} undirected graph making $ O (n) $$\mathsf {CUT} $ queries …

Unbreakable Decomposition in Close-to-Linear Time

A Anand, E Lee, J Li, Y Long, T Saranurak - … of the 2025 Annual ACM-SIAM …, 2025 - SIAM
Unbreakable decomposition, introduced by [CLP+ 19, CKL+ 20], has proven to be one of the
most powerful tools for parameterized graph cut problems in recent years. Unfortunately, all …

Cactus Representations in Polylogarithmic Max-flow via Maximal Isolating Mincuts

Z He, SE Huang, T Saranurak - Proceedings of the 2024 Annual ACM-SIAM …, 2024 - SIAM
A cactus representation of a graph, introduced by Dinitz et al. in 1976, is an edge sparsifier
of O (n) size that exactly captures all global minimum cuts of the graph. It is a central …