Guillaume Ducoffe

78
Documents

Publications

Publications

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Fast deterministic algorithms for computing all eccentricities in (hyperbolic) Helly graphs

Feodor F Dragan , Guillaume Ducoffe , Heather M Guarnera
Journal of Computer and System Sciences, 2025, 149, pp.103606. ⟨10.1016/j.jcss.2024.103606⟩
Article dans une revue hal-04812612 v1
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Balancing graph Voronoi diagrams with one more vertex

Guillaume Ducoffe
Networks, 2024, 83 (2), pp.368-389. ⟨10.1002/net.22198⟩
Article dans une revue hal-04445634 v1
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Subquadratic-time Algorithm for the Diameter and all Eccentricities on Median Graphs

Pierre Bergé , Guillaume Ducoffe , Michel Habib
Theory of Computing Systems, 2024, 68 (1), pp.144-193. ⟨10.1007/s00224-023-10153-9⟩
Article dans une revue hal-04452245 v1
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$$\alpha _i$$-Metric Graphs: Radius, Diameter and all Eccentricities

Feodor F Dragan , Guillaume Ducoffe
Algorithmica, In press, ⟨10.1007/s00453-024-01223-6⟩
Article dans une revue hal-04520525 v1
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Corrigendum: The diameter of AT‐free graphs

Guillaume Ducoffe
Journal of Graph Theory, In press, ⟨10.1002/jgt.23170⟩
Article dans une revue hal-04693583 v1
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Graph based analysis of the Bucharest transport network

Guillaume Ducoffe
Romanian Journal of Information Technology and Automatic Control, 2024, 34 (1), pp.59-68. ⟨10.33436/v34i1y202406⟩
Article dans une revue hal-04541711 v1
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Leanness Computation: Small Values and Special Graph Classes

David Coudert , Samuel Coulomb , Guillaume Ducoffe
Discrete Mathematics and Theoretical Computer Science, 2024, 26 (2), pp.22. ⟨10.46298/dmtcs.12544⟩
Article dans une revue hal-04281128 v3
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Distance problems within Helly graphs and k-Helly graphs

Guillaume Ducoffe
Theoretical Computer Science, 2023, 946, pp.113690. ⟨10.1016/j.tcs.2023.113690⟩
Article dans une revue hal-03942267 v1
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Treelength of series–parallel graphs

Thomas Dissaux , Guillaume Ducoffe , Nicolas Nisse , Simon Nivelle
Discrete Applied Mathematics, 2023, 341, pp.16-30. ⟨10.1016/j.dam.2023.07.022⟩
Article dans une revue hal-04268050 v1
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The power of interval models for computing graph centralities

Guillaume Ducoffe
Romanian Journal of Information Technology and Automatic Control, 2022, 32 (4), pp.33-44. ⟨10.33436/v32i4y202203⟩
Article dans une revue hal-03906922 v1
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A variation of Boolean distance

Guillaume Ducoffe
Bulletin mathématique de la Société des Sciences mathématiques de Roumanie, 2022, 65(113) (4), pp.405-419
Article dans une revue hal-03876902 v1
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Optimal Centrality Computations Within Bounded Clique-Width Graphs

Guillaume Ducoffe
Algorithmica, In press, ⟨10.1007/s00453-022-01015-w⟩
Article dans une revue hal-03746312 v1
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Maximum Matching in Almost Linear Time on Graphs of Bounded Clique-Width

Guillaume Ducoffe
Algorithmica, In press, ⟨10.1007/s00453-022-00999-9⟩
Article dans une revue hal-03712098 v1
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Eccentricity queries and beyond using hub labels

Guillaume Ducoffe
Theoretical Computer Science, 2022, ⟨10.1016/j.tcs.2022.07.017⟩
Article dans une revue hal-03738888 v1
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The diameter of AT-free graphs

Guillaume Ducoffe
Journal of Graph Theory, 2022, 99 (4), pp.594-614. ⟨10.1002/jgt.22754⟩
Article dans une revue hal-03370937 v1
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Diameter, eccentricities and distance oracle computations on H-minor free graphs and graphs of bounded (distance) VC-dimension

Guillaume Ducoffe , Michel Habib , Laurent Viennot
SIAM Journal on Computing, 2022, 51 (5), pp.1506-1534. ⟨10.1137/20M136551X⟩
Article dans une revue hal-03841015 v1
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Non-existence of stable social groups in information-driven networks

Augustin Chaintreau , Dorian Mazauric , Guillaume Ducoffe
Theory of Computing Systems, In press, 66, pp.758-777. ⟨10.1007/s00224-022-10089-6⟩
Article dans une revue hal-03696264 v1
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A story of diameter, radius and (almost) Helly property

Guillaume Ducoffe , Feodor F Dragan
Networks, 2021, 77 (3), pp.435-453
Article dans une revue hal-02969188 v1
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Fast Diameter Computation within Split Graphs

Guillaume Ducoffe , Michel Habib , Laurent Viennot
Discrete Mathematics and Theoretical Computer Science, 2021, ⟨10.46298/dmtcs.6422⟩
Article dans une revue hal-02307397 v4
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Fast Approximation and Exact Computation of Negative Curvature Parameters of Graphs

Jérémie Chalopin , Victor Chepoi , Feodor F. Dragan , Guillaume Ducoffe , Abdulhakeem Mohammed et al.
Discrete and Computational Geometry, 2021, 65 (3), pp.856-892. ⟨10.1007/s00454-019-00107-9⟩
Article dans une revue hal-02149991 v1
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Faster Approximation Algorithms for Computing Shortest Cycles on Weighted Graphs

Guillaume Ducoffe
SIAM Journal on Discrete Mathematics, 2021, 35 (2), pp.953-969. ⟨10.1137/20M1330415⟩
Article dans une revue hal-03225724 v1
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The use of a pruned modular decomposition for Maximum Matching algorithms on some graph classes

Guillaume Ducoffe , Alexandru Popa
Discrete Applied Mathematics, 2021, 291, pp.201-222. ⟨10.1016/j.dam.2020.12.018⟩
Article dans une revue hal-03095562 v1
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The b-Matching problem in distance-hereditary graphs and beyond

Guillaume Ducoffe , Alexandru Popa
Discrete Applied Mathematics, 2021, 305, pp.233-246. ⟨10.1016/j.dam.2021.09.012⟩
Article dans une revue hal-03359175 v1
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On the Complexity of Computing Treebreadth

Guillaume Ducoffe , Sylvain Legay , Nicolas Nisse
Algorithmica, 2020, 82 (6), pp.1574-1600. ⟨10.1007/s00453-019-00657-7⟩
Article dans une revue hal-02528905 v1
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On the (di)graphs with (directed) proper connection number two

Guillaume Ducoffe , Ruxandra Marinescu-Ghemeci , Alexandru Popa
Discrete Applied Mathematics, 2020, 281, pp.203-215. ⟨10.1016/j.dam.2019.06.024⟩
Article dans une revue hal-02179551 v1
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P-FPT algorithms for bounded clique-width graphs

David Coudert , Guillaume Ducoffe , Alexandru Popa
ACM Transactions on Algorithms, 2019, 15 (3), pp.1-57. ⟨10.1145/3310228⟩
Article dans une revue hal-02152971 v1
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Finding cut-vertices in the square roots of a graph

Guillaume Ducoffe
Discrete Applied Mathematics, 2019, 257, pp.158-174
Article dans une revue hal-01948839 v1
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Equivalence between pathbreadth and strong pathbreadth

Guillaume Ducoffe , Arne Leitert
Discrete Applied Mathematics, 2019, 262, pp.185-188. ⟨10.1016/j.dam.2019.02.009⟩
Article dans une revue hal-02055113 v1
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Low Time Complexity Algorithms for Path Computation in Cayley Graphs

Daniela Aguirre-Guerrero , Guillaume Ducoffe , Lluis Fabrega , Pere Vila , David Coudert
Discrete Applied Mathematics, 2019, 259, pp.218-225. ⟨10.1016/j.dam.2018.12.005⟩
Article dans une revue hal-01973608 v1
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Easy computation of eccentricity approximating trees

Guillaume Ducoffe
Discrete Applied Mathematics, 2019, 260, pp.267-271
Article dans une revue hal-02011252 v1
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How long does it take for all users in a social network to choose their communities?

Jean-Claude Bermond , Augustin Chaintreau , Guillaume Ducoffe , Dorian Mazauric
Discrete Applied Mathematics, 2019, 270, pp.37-57. ⟨10.1016/j.dam.2019.07.023⟩
Article dans une revue hal-02264327 v1
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A short note on the complexity of computing strong pathbreadth

Guillaume Ducoffe
Information Processing Letters, 2018, 133, pp.56-58. ⟨10.1016/j.ipl.2018.01.005⟩
Article dans une revue hal-01735826 v1
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Revisiting Decomposition by Clique Separators

David Coudert , Guillaume Ducoffe
SIAM Journal on Discrete Mathematics, 2018, 32 (1), pp.682 - 694. ⟨10.1137/16M1059837⟩
Article dans une revue hal-01753324 v1
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On interval number in cycle convexity

Julio Araujo , Guillaume Ducoffe , Nicolas Nisse , Karol Suchan
Discrete Mathematics and Theoretical Computer Science, 2018, Vol. 20 no. 1 (1), pp.1-28. ⟨10.23638/DMTCS-20-1-13⟩
Article dans une revue hal-01394201 v4
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On distance-preserving elimination orderings in graphs: Complexity and algorithms

David Coudert , Guillaume Ducoffe , Nicolas Nisse , Mauricio Soto
Discrete Applied Mathematics, 2018, 243, pp.140-153. ⟨10.1016/j.dam.2018.02.007⟩
Article dans une revue hal-01741277 v1
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Applying clique-decomposition for computing Gromov hyperbolicity

Nathann Cohen , David Coudert , Guillaume Ducoffe , Aurélien Lancin
Theoretical Computer Science, 2017, 690, pp.114-139. ⟨10.1016/j.tcs.2017.06.001⟩
Article dans une revue hal-01540756 v1
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Data center interconnection networks are not hyperbolic

David Coudert , Guillaume Ducoffe
Theoretical Computer Science, 2016, 639, pp.72-90. ⟨10.1016/j.tcs.2016.05.025⟩
Article dans une revue hal-01323301 v1
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To Approximate Treewidth, Use Treelength!

David Coudert , Guillaume Ducoffe , Nicolas Nisse
SIAM Journal on Discrete Mathematics, 2016, 30 (3), pp.13. ⟨10.1137/15M1034039⟩
Article dans une revue hal-01348965 v1
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On the hyperbolicity of bipartite graphs and intersection graphs

David Coudert , Guillaume Ducoffe
Discrete Applied Mathematics, 2016, 214, pp.187-195. ⟨10.1016/j.dam.2016.06.017⟩
Article dans une revue hal-01220132 v2
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Eulerian and Hamiltonian dicycles in directed hypergraphs

Julio Araujo , Jean-Claude Bermond , Guillaume Ducoffe
Discrete Mathematics, Algorithms and Applications, 2014, 06, pp.1450012. ⟨10.1142/S1793830914500128⟩
Article dans une revue hal-01104634 v2
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Recognition of C4-free and 1/2-hyperbolic graphs

David Coudert , Guillaume Ducoffe
SIAM Journal on Discrete Mathematics, 2014, 28 (3), pp.1601-1617. ⟨10.1137/140954787⟩
Article dans une revue hal-01070768 v1
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Hamiltonicity of large generalized de Bruijn cycles

Guillaume Ducoffe
Discrete Applied Mathematics, 2013, 161, pp.2200 - 2204. ⟨10.1016/j.dam.2013.02.027⟩
Article dans une revue hal-01103786 v1
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Quasilinear-time eccentricities computation, and more, on median graphs

Pierre Bergé , Guillaume Ducoffe , Michel Habib
SODA 2025, Jan 2025, Nouvelle Orléans (USA), United States
Communication dans un congrès hal-04732470 v1
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Certificates in P and Subquadratic-Time Computation of Radius, Diameter, and all Eccentricities in Graphs

Feodor F. Dragan , Guillaume Ducoffe , Michel Habib , Laurent Viennot
Proceedings of the 2025 Annual ACM-SIAM Symposium on Discrete Algorithms (SODA), Jan 2025, New Orleans (LA), United States. pp.2157--2193, ⟨10.1137/1.9781611978322.70⟩
Communication dans un congrès hal-01729748 v4
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Practical Computation of Graph VC-Dimension

David Coudert , Mónika Csikós , Guillaume Ducoffe , Laurent Viennot
SEA 2024 - Symposium on Experimental Algorithms, Jul 2024, Vienne, Austria. pp.20, ⟨10.4230/LIPIcs.SEA.2024.8⟩
Communication dans un congrès hal-04553784 v1
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αi-Metric Graphs: Radius, Diameter and all Eccentricities

Feodor F Dragan , Guillaume Ducoffe
Graph-Theoretic Concepts in Computer Science (WG 2023), Jun 2023, Fribourg (CH), Switzerland. pp.276-290, ⟨10.1007/978-3-031-43380-1_20⟩
Communication dans un congrès hal-04267646 v1

Subquadratic-Time Algorithm for the Diameter and All Eccentricities on Median Graphs

Pierre Bergé , Guillaume Ducoffe , Michel Habib
39th International Symposium on Theoretical Aspects of Computer Science (STACS 2022), Mar 2022, Marseille, France. ⟨10.4230/LIPIcs.STACS.2022.9⟩
Communication dans un congrès hal-03603802 v1
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Obstructions to faster diameter computation: Asteroidal sets

Guillaume Ducoffe
17th International Symposium on Parameterized and Exact Computation (IPEC 2022), Sep 2022, Postdam, Germany. ⟨10.4230/LIPIcs.IPEC.2022.15⟩
Communication dans un congrès hal-03906291 v1
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Treelength of Series-parallel graphs

Thomas Dissaux , Guillaume Ducoffe , Nicolas Nisse , Simon Nivelle
LAGOS 2021 - XI Latin and American Algorithms, Graphs and Optimization Symposium, May 2021, São Paulo / Virtual, Brazil. ⟨10.1016/j.procs.2021.11.008⟩
Communication dans un congrès hal-03175837 v1
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Optimal centrality computations within bounded clique-width graphs

Guillaume Ducoffe
16th International Symposium on Parameterized and Exact Computation (IPEC 2021), Sep 2021, Lisbon (virtual event), Portugal. ⟨10.4230/LIPIcs.IPEC.2021.16⟩
Communication dans un congrès hal-03445484 v1
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Isometric embeddings in trees and their use in distance problems

Guillaume Ducoffe
46th International Symposium on Mathematical Foundations of Computer Science (MFCS 2021), Aug 2021, Tallinn, Estonia. ⟨10.4230/LIPIcs.MFCS.2021.43⟩
Communication dans un congrès hal-03323472 v1
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Fast deterministic algorithms for computing all eccentricities in (hyperbolic) Helly graphs

Feodor F Dragan , Guillaume Ducoffe , Heather M Guarnera
Algorithms and Data Structures 17th International Symposium (WADS 2021), Aug 2021, Halifax, Nova Scotia (Virtual Event), Canada. pp.300-314, ⟨10.1007/978-3-030-83508-8_22⟩
Communication dans un congrès hal-03315928 v1
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Maximum Matching in almost linear time on graphs of bounded clique-width

Guillaume Ducoffe
16th International Symposium on Parameterized and Exact Computation (IPEC 2021), Sep 2021, Lisbon (virtual event), Portugal. ⟨10.4230/LIPIcs.IPEC.2021.15⟩
Communication dans un congrès hal-03445479 v1
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Beyond Helly graphs: the diameter problem on absolute retracts

Guillaume Ducoffe
47th International Workshop on Graph-Theoretic Concepts in Computer Science (WG 2021), Jun 2021, Warsaw (online), Poland. pp.321-335, ⟨10.1007/978-3-030-86838-3_25⟩
Communication dans un congrès hal-03350582 v1
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On computing the average distance for some chordal-like graphs

Guillaume Ducoffe
46th International Symposium on Mathematical Foundations of Computer Science (MFCS 2021), Aug 2021, Tallinn, Estonia. ⟨10.4230/LIPIcs.MFCS.2021.44⟩
Communication dans un congrès hal-03323471 v1
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Diameter computation on H-minor free graphs and graphs of bounded (distance) VC-dimension

Guillaume Ducoffe , Michel Habib , Laurent Viennot
SODA 2020 - ACM-SIAM Symposium on Discrete Algorithms, Jan 2020, Salt Lake City, United States
Communication dans un congrès hal-02340382 v1
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The 4-Steiner Root Problem

Guillaume Ducoffe
45th International Workshop on Graph-Theoretic Concepts in Computer Science (WG 2019), Jun 2019, Vall de Nuria, Spain. pp.14-26, ⟨10.1007/978-3-030-30786-8_2⟩
Communication dans un congrès hal-02290671 v1
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A new application of Orthogonal Range Searching for computing Giant Graph Diameters

Guillaume Ducoffe
2nd Symposium on Simplicity in Algorithms (SOSA 2019), Jan 2019, San Diego, CA, United States. pp.12:1-12:7, ⟨10.4230/OASIcs.SOSA.2019.12⟩
Communication dans un congrès hal-01974190 v1
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Faster approximation algorithms for computing shortest cycles on weighted graphs

Guillaume Ducoffe
46th International Colloquium on Automata, Languages, and Programming (ICALP 2019), Jul 2019, Patras, Greece. ⟨10.4230/LIPIcs.ICALP.2019.44⟩
Communication dans un congrès hal-02173350 v1

Fast Diameter Computation within Split Graphs

Guillaume Ducoffe , Michel Habib , Laurent Viennot
COCOA 2019 - 13th Annual International Conference on Combinatorial Optimization and Applications, Dec 2019, Xiamen, China
Communication dans un congrès hal-03373614 v1
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Extremal Graphs with respect to the Modified First Zagreb Connection Index

Guillaume Ducoffe , Ruxandra Marinescu-Ghemeci , Camelia Obreja , Alexandru Popa , Rozica Maria Tache
20th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC), Sep 2018, Timisoara, Romania. ⟨10.1109/SYNASC.2018.00033⟩
Communication dans un congrès hal-02011274 v1
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The use of a pruned modular decomposition for Maximum Matching algorithms on some graph classes

Guillaume Ducoffe , Alexandru Popa
29th International Symposium on Algorithms and Computation (ISAAC 2018), Dec 2018, Jiaoxi, Yilan County, Taiwan. ⟨10.4230/LIPIcs.ISAAC.2018.144⟩
Communication dans un congrès hal-01955985 v1
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Fast Approximation and Exact Computation of Negative Curvature Parameters of Graphs

Jérémie Chalopin , Victor Chepoi , Feodor F. Dragan , Guillaume Ducoffe , Abdulhakeem Mohammed et al.
34th International Symposium on Computational Geometry (SoCG 2018), Jun 2018, Budapest, Hungary. pp.22, ⟨10.4230/LIPIcs.SoCG.2018.22⟩
Communication dans un congrès hal-01836063 v1
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The b-Matching problem in distance-hereditary graphs and beyond

Guillaume Ducoffe , Alexandru Popa
29th International Symposium on Algorithms and Computation (ISAAC 2018), Dec 2018, Jiaoxi, Yilan County, Taiwan. pp.1 - 122, ⟨10.4230/LIPIcs.ISAAC.2018.122⟩
Communication dans un congrès hal-01955994 v1
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Fully polynomial FPT algorithms for some classes of bounded clique-width graphs

David Coudert , Guillaume Ducoffe , Alexandru Popa
ACM-SIAM Symposium on Discrete Algorithms, Jan 2018, New Orleans, United States. pp.20, ⟨10.1137/1.9781611975031.176⟩
Communication dans un congrès hal-01676187 v1
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How long does it take for all users in a social network to choose their communities?

Jean-Claude Bermond , Augustin Chaintreau , Guillaume Ducoffe , Dorian Mazauric
FUN 2018 - 9th International Conference on Fun with Algorithms, 2018, La Maddalena, Italy
Communication dans un congrès hal-01780627 v1
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Extremal Graphs with respect to the Modified First Zagreb Connection Index

Guillaume Ducoffe , Ruxandra Marinescu-Ghemeci , Camelia Obreja , Alexandru Popa , Rozica Maria Tache
Cologne-Twente Workshop on Graphs and Combinatorial Optimization (CTW), Jun 2018, Paris, France
Communication dans un congrès hal-02011265 v1
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Finding cut-vertices in the square roots of a graph

Guillaume Ducoffe
43rd International Workshop on Graph-Theoretic Concepts in Computer Science (WG 2017), Jun 2017, Eindhoven, Netherlands. pp.234--248, ⟨10.1007/978-3-319-68705-6_18⟩
Communication dans un congrès hal-01627959 v1
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A simple approach for lower-bounding the distortion in any Hyperbolic embedding

David Coudert , Guillaume Ducoffe
EUROCOMB'17 -- The European Conference on Combinatorics, Graph Theory and Applications, Aug 2017, Vienna, Austria. pp.293 - 299, ⟨10.1016/j.endm.2017.06.051⟩
Communication dans un congrès hal-01573042 v1
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On the (di)graphs with (directed) proper connection number two

Guillaume Ducoffe , Ruxandra Marinescu-Ghemeci , Alexandru Popa
IX Latin and American Algorithms, Graphs and Optimization Symposium (LAGOS), Sep 2017, Marseille, France. pp.237 - 242, ⟨10.1016/j.endm.2017.10.041⟩
Communication dans un congrès hal-01625042 v1
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On the Complexity of Computing Treebreadth

Guillaume Ducoffe , Sylvain Legay , Nicolas Nisse
27th International Workshop on Combinatorial Algorithms, IWOCA 2016, Aug 2016, Helsinki, Finland. pp.3-15, ⟨10.1007/978-3-319-44543-4_1⟩
Communication dans un congrès hal-01354996 v1
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Liens entre symétries et étirements de routages dans les réseaux d'interconnexions de centres de données

David Coudert , Guillaume Ducoffe
ALGOTEL 2016 - 18èmes Rencontres Francophones sur les Aspects Algorithmiques des Télécommunications, May 2016, Bayonne, France
Communication dans un congrès hal-01302470 v1
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The Parallel Complexity of Coloring Games

Guillaume Ducoffe
9th International Symposium, SAGT 2016, Sep 2016, Liverpool, United Kingdom. pp.27-39, ⟨10.1007/978-3-662-53354-3_3⟩
Communication dans un congrès hal-01361056 v1
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Vers une plus grande transparence du Web

Augustin Chaintreau , Guillaume Ducoffe , Roxana Geambasu , Mathias Lécuyer
ALGOTEL 2015 — 17èmes Rencontres Francophones sur les Aspects Algorithmiques des Télécommunications, Jun 2015, Beaune, France
Communication dans un congrès hal-01144787 v1
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Structure vs métrique dans les graphes

David Coudert , Guillaume Ducoffe , Nicolas Nisse
ALGOTEL 2015 — 17èmes Rencontres Francophones sur les Aspects Algorithmiques des Télécommunications, Jun 2015, Beaune, France
Communication dans un congrès hal-01144694 v1
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XRay: Enhancing the Web's Transparency with Differential Correlation

Mathias Lecuyer , Guillaume Ducoffe , Francis Lan , Andrei Papancea , Theofilos Petsios et al.
USENIX Security Symposium, Aug 2014, San Diego, United States
Communication dans un congrès hal-01100757 v1
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De la difficulté de garder ses amis (quand on a des ennemis) !

Guillaume Ducoffe , Dorian Mazauric , Augustin Chaintreau
15èmes Rencontres Francophones sur les Aspects Algorithmiques des Télécommunications (AlgoTel), May 2013, Pornic, France. pp.1-4
Communication dans un congrès hal-00815680 v1
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Web Transparency for Complex Targeting: Algorithms, Limits, and Tradeoffs

Guillaume Ducoffe , Mathias Lécuyer , Augustin Chaintreau , Roxana Geambasu
SIGMETRICS '15 Proceedings of the 2015 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems, Jun 2015, Portland, Oregon, United States. , ⟨10.1145/2745844.2745896⟩
Poster de conférence hal-01163552 v1