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20 results for “approximation algorithms”

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cs.DScs.DMTheoreticalRecentJun 30, 2026

Constant-factor approximation of maximum distance-2 independent set in graphs of bounded merge-width

Maël Dumas

The paper provides constant-factor approximation algorithms for Max Dist-2 Independent Set and Min Dominating Set in graphs of bounded radius-2 merge-width.

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cs.DSTheoreticalRecentJul 9, 2026

Locally Approximating the Top Eigenvector of Bounded Entry Matrices

Nicolas Menand, Erik Waingarten

This paper presents a local computation algorithm to approximate the top eigenvector of a symmetric matrix with entries between -1 and 1, building on Swartworth and Woodruff's work.

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cs.DScs.DMTheoreticalRecentJul 23, 2026

Approximation Algorithms for Inventory Problems with Decomposable Submodular Ordering Costs

Retsef Levi, Georgia Perakis, Emily Zhang

This paper proposes an approximation algorithm for the submodular joint replenishment problem with decomposable submodular ordering cost functions, achieving an O(k)-approximation.

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cs.DSTheoreticalRecentJul 21, 2026

$\tilde{O}$ptimal Algorithm for 2-Approximate All Pair Shortest Paths -- almost

Manoj Gupta, Mrigankashekhar Shandilya

This paper presents a randomized algorithm that runs in $ ilde{O}(n^2)$ time and, with high probability, guarantees a 2-approximation for all pairs at distance at least $c$ in an undirected, unweighte…

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cs.DSTheoreticalRecentJun 15, 2026

Approximation Preserving Coresets

Milind Prabhu, Chris Schwiegelshohn, Sudarshan Shyam

This paper introduces approximation-preserving coresets, which provide weaker guarantees than strong coresets but stronger guarantees than weak coresets for preserving the costs of good solutions in b…

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cs.DSTheoreticalRecentJun 26, 2026

Incremental Submodular Maximization: Better Than Greedy

Marcin Bienkowski, Joakim Blikstad, Jarosław Byrka, Martín Costa +2 more

The paper presents an adaptive scaling algorithm with a competitive ratio of 1.373 for incremental submodular maximization under increasing cardinality constraint, improving upon the previous best res…

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cs.DScs.CCTheoreticalRecentJun 16, 2026

Directed Reachability-Preserving Minimum Edge Cut: Approximation and Planar Hardness

Qi Duan

This paper presents approximation algorithms for the one-way directed Reachability-Preserving Minimum Edge Cut problem in directed graphs.

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cs.DScs.CCcs.DMTheoreticalRecentJul 20, 2026

On the Impact of Stability and the Helly Property on the Dominating Set Problem

Che Cheng, Daniel Mock, Peter Rossmanith

The paper removes stability requirement from the progressive exploration algorithm for Dominating Set, yielding a fixed-parameter tractable algorithm on certain graph classes.

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cs.DSTheoreticalRecentJun 16, 2026

Exact Algorithms for Edge Deletion to Cactus Graphs and Weighted Variants

Wenhao Song

This paper improves the time complexity of exact algorithms for converting a connected graph into a cactus by reducing it from O*(3^n) to O*(2^n) for unweighted graphs, and provides faster algorithms…

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cs.CGcs.DMTheoreticalRecentJul 1, 2026

On Reconstructing a Convex Polygon from Partial Information

Alexander Baumann, Therese Biedl, Mahmoud Elashmawi, Simon D. Fink +2 more

This paper systematically explores the convex polygon reconstruction problem with specified sets of features, contributing new testing algorithms and hardness results.

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cs.DSTheoreticalRecentJul 3, 2026

Optimality-Preserving Data Reduction for Maximum k-Cut (Full Version)

Michael Kaibel, Petra Mutzel

This paper introduces structured cut sets, a novel preprocessing technique for Maximum k-Cut, and extends existing techniques from Maximum Cut. The rules are optimality-preserving and yield significan…

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cs.DScs.CCTheoreticalRecentJun 11, 2026

Sketching Intersection Profiles: A Simple Proof and Three Applications

Flavio Chierichetti, Mirko Giacchini, Ravi Kumar, Alessandro Panconesi +2 more

This paper settles the complexity of three sketching problems in graphs and distributions.

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cs.DScs.DMmath.COTheoreticalRecentJul 10, 2026

A Polynomial-Time Algorithm for Coloring Perfect Graphs Based on Walk Counting

Amir Ali Ahmadi, Pravesh K. Kothari, Yukai Tang

A new polynomial-time algorithm is presented for optimally coloring perfect graphs using graph-theoretic operations and iterative walk counting.

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cs.CGRecentMay 31, 2026

On Fréchet Traveling Salesmen Problems

Omrit Filtser, Tzalik Maimon, Michal Moiseev

This paper introduces a new variant of the Traveling Salesman Problem where the goal is to find two paths connecting a set of sites while minimizing the Fréchet distance between the two paths.

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