Výsledky vyhledávání - G.2 DISCRETE MATHEMATICS. Graph algorithms

Exact values for three domination-like problems in circular and infinite grid graphs of small height Autor Bouznif, Marwane, Darlay, Julien, Moncel, Julien, Preissmann, Myriam

“… We are interested in finding the minimum cardinality of such codes in circular and infinite grid graphs of given height…”
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ABC(T)-graphs: An axiomatic characterization of the median procedure in graphs with connected and G 2 -connected medians Autor Bénéteau, Laurine, Chalopin, Jérémie, Chepoi, Victor, Vaxès, Yann

“… In this paper, we show that modular graphs with $G^2$-connected medians (in particular, bipartite Helly graphs) are ABC-graphs…”
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An O(|E(G)|2) algorithm for recognizing Pfaffian graphs of a type of bipartite graphs Autor Feng, Xing, Zhang, Lianzhu, Zhang, Mingzu

“… Then, we design an O ( | E ( G ) | 2 ) algorithm for recognizing Pfaffian graphs in this class and constructs a Pfaffian orientation if the graph is Pfaffian…”
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Graphs with $$G^p$$-connected medians Autor Bénéteau, Laurine, Chalopin, Jérémie, Chepoi, Victor, Vaxès, Yann

“… (and thus chordal graphs), graphs with convex balls, bucolic graphs, and bipartite absolute retracts, have $G^2$-connected medians…”
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GMap: Visualizing graphs and clusters as maps Autor Gansner, E.R., Yifan Hu, Kobourov, S.

“… In this paper, we describe GMap, a practical algorithm for visualizing relational data with geographic-like maps…”
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Paired domination versus domination and packing number in graphs Autor Dettlaff, Magda, Gözüpek, Didem, Raczek, Joanna

“… ) . In this paper, we prove that it is NP-hard to determine whether γ pr ( G ) = 2 γ ( G ) even for bipartite graphs…”
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Graphs with convex balls Autor Chalopin, Jérémie, Chepoi, Victor, Giocanti, Ugo

“…) and Farber and Jamison (Discrete Math 66: 231–247, 1987). CB-graphs and CB-groups generalize systolic (alias bridged…”
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O(VE) time algorithms for the Grundy (First-Fit) chromatic number of block graphs and graphs with large girth Autor Zaker, Manouchehr

“… We first obtain an O(VE) algorithm to determine the Grundy number of block graphs i.e. graphs in which every biconnected component is a complete graph…”
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Hardness and algorithms for rainbow connection Autor Chakraborty, Sourav, Fischer, Eldar, Matsliah, Arie, Yuster, Raphael

“…An edge-colored graph G is rainbow connected if any two vertices are connected by a path whose edges have distinct colors…”
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Algorithmic aspect on the minimum (weighted) doubly resolving set problem of graphs Autor Lu, Changhong, Ye, Qingjie, Zhu, Chengru

“… (MWDRS) problem is finding a doubly resolving set with minimum total weight. We establish a linear time algorithm for the MWDRS problem of all graphs in which each block is complete graph or cycle…”
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Multicuts in Planar and Bounded-Genus Graphs with Bounded Number of Terminals Autor Colin de Verdière, Éric

“…) and has a fixed number  t of terminals. The running time is a polynomial of degree  O ( g 2 + g t ) in the input size. In the planar case, our result corrects an error in an extended abstract by Bentz…”
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Algorithmic and complexity aspects of problems related to total Roman domination for graphs Autor Poureidi, Abolfazl, Rad, Nader Jafari

“… ) . The Roman domination number of a graph G , denoted by γ R ( G ) , is the minimum weight of a Roman dominating function on G . A connected (respectively, total…”
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Minimum k -path vertex cover Autor BRESAR, Bostjan, KARDOS, Frantisek, KATRENIC, Ján, SEMANISIN, Gabriel

“… ) and provide several estimations and exact values of ψ k ( G ) . We also prove that ψ 3 ( G ) ≤ ( 2 n + m ) / 6 , for every graph G with n vertices and m edges…”
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Computing densest k-subgraph with structural parameters Autor Hanaka, Tesshu

“… deletion number, respectively. Furthermore, we give a 2-approximation 2 tc ( G ) / 2 n O ( 1 ) -time algorithm where tc…”
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Hybrid intermittent fault diagnosis of general graphs Autor Yang, Lulu, Zhou, Shuming, Zheng, Weixing

“… Furthermore, we propose a HIFPD-MM* algorithm, which possesses a time complexity of O(k×|V(G)|⋅(Δ(G))2), where k…”
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Fast Algorithms for Minimum Homology Basis Autor Dhar, Amritendu, Natarajan, Vijay, Rathod, Abhishek

“… . This problem has been extensively studied in the last few years. For general complexes, the current best deterministic algorithm, by Dey et al. (LATIN 2018…”
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Multicut Problems in Embedded Graphs: The Dependency of Complexity on the Demand Pattern Autor Focke, Jacob, Hörsch, Florian, Li, Shaohua, Marx, Dániel

“… $$f(t,g)n^{O(\sqrt{g^2+gt+t})}$$ f ( t , g ) n O ( g 2 + g t + t ) . Cohen-Addad et al. [ JACM , 2021] proved a matching lower bound showing that the exponent of n is essentially best possible…”
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Exponential Domination in Subcubic Graphs Autor Bessy, Stéphane, Ochem, Pascal, Rautenbach, Dieter

“…As a natural variant of domination in graphs, Dankelmann et al. [Domination with exponential decay, Discrete Math. 309 (2009) 5877-5883…”
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Identifying Codes in Line Graphs Autor Foucaud, Florent, Gravier, Sylvain, Naserasr, Reza, Parreau, Aline, Valicov, Petru

“… We also prove that the upper bound γID(L(G))≤2|V(G)|−5, where L(G) is the line graph of G, holds (with two exceptions…”
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Monitoring the edges of a graph using distances Autor Foucaud, Florent, Kao, Shih-Shun, Klasing, Ralf, Miller, Mirka, Ryan, Joe

“…We introduce a new graph-theoretic concept in the area of network monitoring. A set M of vertices of a graph G is a distance-edge-monitoring set if for every…”
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