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20 results for “Dual graph”

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cs.DScs.CCcs.DMTheoreticalRecentJun 26, 2026

Maximum Cut Algorithms and Upper Bounds for Planar and Toroidal Graphs

Mark Glass, Meir Feder

The authors map the problem of finding the maximum cut of a planar graph with arbitrary weights to a minimum T-join problem in the absolute dual graph, enabling the use of shortest paths and adapting…

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math.COcs.DMTheoreticalRecentJul 8, 2026

A coarse block-cut tree theorem

Júlia Baligács, Václav Blažej, Jadwiga Czyżewska, Michał Pilipczuk +1 more

This paper proves a coarse tree decomposition of graphs with bounded adhesion sets and separators.

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math.COcs.DMTheoreticalRecentJun 25, 2026

Totally Disjoint Diametral Paths

Tınaz Ekim, Arthur Farley

This paper studies the problem of finding totally disjoint diametral paths in simple connected graphs and provides algorithms for certain classes of graphs.

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cs.DSmath.CONEWTheoreticalJul 28, 2026

Optimization of the directed spanning trees using the weighted matroid intersection algorithm

Binhong Jiang, Gehao Wang

The paper presents an algorithm for updating a Directed Minimum Spanning Tree using the weighted matroid intersection algorithm and a dynamic auxiliary graph.

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cs.DMmath.COTheoreticalRecentJul 3, 2026

The disjoint separators problem in graphs

Thomas Delépine, Florian Galliot, Yannick Mogge, Leandro Montero +1 more

This paper studies the NP-completeness and provides a polynomial-time algorithm for the disjoint separators problem in planar graphs when all sizes are equal to one.

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cs.CGcs.DMmath.COTheoreticalRecentJun 25, 2026

Unbent collections of non-planar $s$-grid-drawing

Therese Biedl

The paper shows that for non-planar orthogonal drawings of a graph, two drawings are sufficient instead of the planar case's three.

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cs.DCcs.DSEmpiricalRecentJul 22, 2026

Fully Dynamic Rooted Spanning Tree on GPU

Abhijeet Sahu, Harmit Singh, Soham Nandy, G. Ramakrishna

This paper presents four novel parallel algorithms for maintaining a rooted spanning forest in dynamic graphs, achieving a throughput of 2 million insertions and 1.4 million deletions per second.

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cs.DScs.GTTheoreticalRecentJul 17, 2026

Solving Stackelberg Vertex Cover on trees using split and join

Dominik Scheder, Johannes Tantow

This paper presents three new algorithms for maximizing revenue in the Stackelberg Vertex Cover problem on certain kinds of trees.

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math.COcs.CCTheoreticalRecentJul 10, 2026

Cut-homotopies and the complexity of edge-coloring problems

Alexey Barsukov, Roman Feller, Maximilian Hadek, Davide Perinti

The paper shows that every problem asking if a given graph has an edge-coloring without an edge-colored clique from a fixed family is poly-time equivalent to a Constraint Satisfaction Problem, resulti…

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cs.DSEmpiricalRecentJun 12, 2026

On a Conjecture for Parameterized st-Orientations

Charalampos Papamanthou

This paper disproves a conjecture about the longest-path lengths of MaxSTN and MinSTN algorithms for producing $st$-orientations of biconnected graphs.

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cs.CCTheoreticalRecentJul 21, 2026

On the Complexity of Graph Edit Distance in Restricted Graph Classes

Maximilian Limmer, Nils M. Kriege

The paper investigates the relationship between graph classes, edit cost functions, and computational complexity of the graph edit distance, providing polynomial-time reductions and correspondences.

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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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math.COcs.ITTheoreticalRecentJul 15, 2026

Independent Sets in Multiset Profile Graphs via Weighted Local Covers

Aryeh Lev Zabokritskiy

This paper studies the maximum size of an independent set in the discrete simplex graph and provides new bounds using translated smaller graphs and finite rational linear systems.

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cs.CCTheoreticalRecentJul 10, 2026

Complexity of the Graph Homomorphism Problem w.r.t. Degeneracy

Grigorii Braulov, Nikolai Chukhin, Alexander S. Kulikov, Ivan Mihajlin

This paper studies the complexity of the graph homomorphism problem in terms of the degeneracy of the target graph and shows that under ETH, there is no efficient algorithm for this problem.

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cs.NIEmpiricalRecentJul 27, 2026

Methods for Path Set Attribute Calculation in Network Systems

Giovanni Fiaschi, Carlo Vitucci, Thomas Westerbäck, Daniel Sundmark +1 more

This paper presents an optimized algorithm for computing cut sets of a path set in graph theory and introduces a vectorized computational framework for property calculations.

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cs.HCEmpiricalRecentJul 15, 2026

ZipLine: Visual Analysis of Multivariate Graphs with Predicate Logic

Sjoerd Vink, Suyang Li, Brian Montambault, Michael Behrisch +2 more

This paper introduces ZipLine, a system for integrative analysis of multivariate graphs through a unified predicate language and learning algorithm.

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cs.DMTheoreticalRecentJun 11, 2026

Snake Polyominoes of Maximal Area in a Rectangle

Alexandre Blondin Massé, Alain Goupil

This paper presents an algorithm to generate snake-like polyominoes within a given rectangle and provides exact formulas for the maximal area of such polyominoes for certain dimensions.

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