Associate professor
Director, Sentinelle Nord Research Chair on Applications and Theory of Network Analysis
Codirector, Dynamica Research Lab on the structure and the dynamics of complex systems
Board member, Centre Interdisciplinaire en Modélisation Mathématique de l’Université Laval (CIMMUL)
External faculty, Vermont Complex Systems Center (University of Vermont)
Département de physique, de génie physique et d'optique
Pavillon Alexandre-Vachon
1045 avenue de la Médecine
Université Laval
Québec (Québec) G1V 0A6, Canada
NetSci 2024
We are excited to welcome the Network Science community in Québec City from June 17th to June 21st for the Network Science Society's flagship International School and Conference on Network Science. Visit https://netsci2024.com for full details or follow us on X, on Bluesky or on Mastodon.
Networks and Space
Whether physical or abstract, space shapes the topology of many real complex networks. The collection Networks and Space explores the synergy between geometry and graph theory and is now open for submission! Several APC waivers are available; get in touch for details.CNWW 2023
The Complex Networks Winter Workshop (CNWW) is an international school that offers an extraordinary opportunity for participants to engage in rigorous transdisciplinary complexity science research alongside some of the top researchers in the field of networks. Visit https://vermontcomplexsystems.org/events/cnww/ for full details.
New papers in Network Science
Stay up-to-date with the literature broadly related to complex networks by subscribing to this semi-automatically curated list of new publications in Network Science on X, on Bluesky, on Mastodon, or by joining our mailing list. Click here for more details.News
2023.11.22 — New paper in Nat. Commun.: The D-Mercator method for the multidimensional hyperbolic embedding of real networks.
2023.11.10 — New manuscript on the arXiv: Firing rate distributions in plastic networks of spiking neurons.
2023.11.01 — New manuscript on bioRxiv: A probabilistic methodology to reconstruct biodiversity from implicit interactions with indicator species along latitudinal co-occurrence networks.
2023.11.02 — New paper in Nat. Phys.: Geometric description of clustering in directed networks.
2023.10.27 — New paper in Sci. Total Environ.: The umbrella value of caribou management strategies for biodiversity conservation in boreal forests under global change.
2023.10.20 — New paper in Bull. Math. Biol.: Temporal and Probabilistic Comparisons of Epidemic Interventions.
2023.09.28 — The slides from my talk at the Vermont-KIAS workshop titled Rethinking interactions among the constituents of complex systems: The case for latent hyperbolic geometry are available here.
2023.07.25 — New paper in J. Phys. Complex.: Hierarchical team structure and multidimensional localization (or siloing) on networks.
2023.07.19 — New paper in Proc. R. Soc. A: Exact and rapid linear clustering of networks with dynamic programming.
2023.07.12 — François Thibault, Simon Lizotte, Jérémi Lesage, Alice Patania, Guillaume St-Onge and Laurent Hébert-Dufresne are presenting our latest results at the NetSci 2023 conference.
2023.07.10 — New manuscript on the arXiv: Modeling critical connectivity constraints in random and empirical networks.
2023.06.30 — The slides from my talk at the Institute for Biocomputation and Physics of Complex Systems titled Geometric description of clustering in directed networks are available here.
2023.06.01 — I have been promoted to Associate professor with tenure.
2023.05.21 — The slides from my lectures at the Advanced Field School in Computational Ecology titled An introduction to the methodologies for studying complex networks are available here.
2023.05.19 — New paper in PNAS Nexus: Dimension reduction of dynamics on modular and heterogeneous directed networks.
2023.05.09 — New paper in PNAS Nexus: Dimension matters when modeling network communities in hyperbolic spaces.
2023.05.08 — New paper in SIAM Reviews: The role of directionality, heterogeneity and correlations in epidemic risk and spread.
2023.04.27 — New paper in Diversity and Distributions: Effects of global change on bird and beetle populations in boreal forest landscape: An assemblage dissimilarity analysis.
2022.04.21 — The slides from my talk at the workshop Dynamics of Interacting Contagions at the Santa Fe Institute titled The role of directionality, heterogeneity & correlations in epidemic risk and spread are available here.
2023.04.14 — New manuscript on the arXiv: D-Mercator: multidimensional hyperbolic embedding of real networks.
2023.03.15 — New paper in PLOS Climate: Long-term effect of forest harvesting on boreal species assemblages under climate change.
2023.02.27 — New manuscript on the arXiv: Indistinguishability of simple and complex contagion under uncertain transmission settings.
2023.02.08 — New manuscript on the arXiv: Temporal and probabilistic forecasts of epidemic interventions.
2023.01.27 — Olivier Ribordy successfully completed his Master's degree in Physics with the final acceptation of his thesis titled De la densité spectrale des réseaux extrêmement creux. Congratulations!
2022.12.20 — François Thibault successfully completed his Master's degree in Physics with the final acceptation of his thesis titled Modèles de graphes aléatoires avec séquences de degrés et de centralité fixes. Congratulations!
2022.12.15 — Béatrice Désy successfully completed her Master's degree in Physics with the final acceptation of her thesis titled Effets de la dimension des réseaux hyperboliques sur la modélisation de la structure communautaire. Her thesis was added to the Board of Honour, the highest distinction at Université Laval. Congratulations!
2022.12.01 — Simon Lizotte successfully completed his Master's degree in Physics with the final acceptation of his thesis titled Inférence de la structure d’interactions de données bruitées. His thesis was added to the Board of Honour, the highest distinction at Université Laval. Congratulations!
Research team
My Research Chair is part of the Dynamica Research Lab on Complex Systems that I lead alongside Patrick Desrosiers. I also co-supervise students or postdoctoral researchers affiliated with other research groups.
Dynamica Lab annual scientific symposium (Aug. 2021)
(third row) Antoine A., François T., Olivier R., Francis N., Vincent T., Patrick D., Jeson H., Gabriel G.
(second row) Pierre-Luc L., Vincent P., Olivier L.-G., Zahra Y., Jérémi L., Jérémie G.
(front) Charles M., Ilhem B., Béatrice D., Simon L.
(absent) Heikel J., Antoine L., Guillaume S., Marina V. L.
Currently under my (co-)supervision
Gabriel Bergeron
PhD student
Simon Lizotte
PhD student
Olivier Ribordy
PhD student
François Thibault
PhD student
Zahra Yazdani
PhD student
Jérémi Lesage
MSc student
Former members
Publications
Listed in inverse chronological order; equal contributions are denoted by *.
Most of the publications below can also be found on arXiv or on Google Scholar.
Submitted manuscripts and preprints
Firing rate distributions in plastic networks of spiking neurons
M. Vegué, A. Allard and P. Desrosiers
arXiv
A probabilistic methodology to reconstruct biodiversity from implicit interactions with indicator species along latitudinal co-occurrence networks
I. Bouderbala, J. A. Tremblay, D. Fortin, A. Allard and P. Desrosiers
bioRxiv
Modeling critical connectivity constraints in random and empirical networks
L. Hébert-Dufresne, M. Pósfai and A. Allard
arXiv
Indistinguishability of simple and complex contagion under uncertain transmission settings
G. St-Onge, L. Hébert-Dufresne and A. Allard
arXiv
Duality between predictability and reconstructability in complex systems
C. Murphy, V. Thibeault, A. Allard and P. Desrosiers
arXiv
Network Onion Divergence: Network representation and comparison using nested configuration models with fixed connectivity, correlation and centrality patterns
L. Hébert-Dufresne, J.-G. Young, A. Daniels and A. Allard
arXiv
The network epidemiology of an Ebola epidemic
L. Hébert-Dufresne, J.-G. Young, J. Bedson, L. A. Skrip, D. Pedi, M. F. Jalloh, B. Raulier, O. Lapointe-Gagné, A. Jambai, A. Allard and B. M. Althouse
arXiv
On the accuracy of message-passing approaches to percolation in complex networks
A. Allard and L. Hébert-Dufresne
arXiv
2020s
Hypergraph reconstruction from uncertain pairwise observations
S. Lizotte, J.-G. Young and A. Allard
To appear in Scientific Reports
Full text
|
arXiv
The unintended consequences of inconsistent closure policies and mobility restrictions during epidemics
B. M. Althouse, B. Wallace, B. Case, S. V. Scarpino, A. Allard, A. M. Berdahl, E. R. White and L. Hébert-Dufresne
To appear in BMC Global and Public Health
Full text
|
medRxiv
NBS-SNI, an extension of the Network-based statistic:Abnormal functional connections between important structural actors
F. Normand, M. Gajwani, D. C. Côté and A. Allard
To appear in Network Neuroscience
Full text
|
bioRxiv
The low-rank hypothesis of complex systems
V. Thibeault, A. Allard and P. Desrosiers
To appear in Nature Physics
Full text
|
arXiv
The umbrella value of caribou management strategies for biodiversity conservation in boreal forests under global change
G. Labadie, I. Bouderbala, Y. Boulanger, J.-M. Béland, C. Hébert, A. Allard, M. Hebblewhite and D. Fortin
Science of the Total Environment 907, 168087 (2024)
Full text
The D-Mercator method for the multidimensional hyperbolic embedding of real networks
R. Jankowski, A. Allard, M. Boguñá and M. Á. Serrano
Nature Communications 14, 7585 (2023)
Full text
|
arXiv
Geometric description of clustering in directed networks
A. Allard, M. Á. Serrano and M. Boguñá
Nature Physics (2023)
Full text
|
arXiv
Temporal and probabilistic forecasts of epidemic interventions
M. C. Boudreau, A. J. Allen, N. J. Roberts, A. Allard and L. Hébert-Dufresne
Bulletin of Mathematical Biology 85, 118 (2023)
Full text
|
arXiv
Hierarchical team structure and multidimensional localization (or siloing) on networks
L. Hébert-Dufresne, G. St-Onge, J. Meluso, J. P. Bagrow and A. Allard
Journal of Physics: Complexity 4, 035002 (2023)
Full text
|
arXiv
Exact and rapid linear clustering of networks with dynamic programming
A. Patania, A. Allard and J.-G. Young
Proceedings of the Royal Society A 479, 20230159 (2023)
Full text
|
arXiv
Dimension reduction of dynamics on modular and heterogeneous directed networks
M. Vegué, V. Thibeault, P. Desrosiers and A. Allard
PNAS Nexus 2, pgad150 (2023)
Full text
|
arXiv
Dimension matters when modeling network communities in hyperbolic spaces
B. Désy, P. Desrosiers and A. Allard
PNAS Nexus 2, pgad136 (2023)
Full text
|
arXiv
Effects of global change on bird and beetle populations in boreal forest landscape: An assemblage dissimilarity analysis
I. Bouderbala, G. Labadie, J.-M. Leblanc, Y. Boulanger, C. Hébert, P. Desrosiers, A. Allard and D. Fortin
Diversity and Distributions 29, 757-773 (2023)
Full text
|
bioRxiv
The role of directionality, heterogeneity and correlations in epidemic risk and spread
A. Allard, C. Moore, S. V. Scarpino, B. M. Althouse and L. Hébert-Dufresne
SIAM Review 65, 471-492 (2023)
Full text
|
arXiv
Long-term effect of forest harvesting on boreal species assemblages under climate change
I. Bouderbala, G. Labadie, J.-M. Leblanc, J. A. Tremblay, Y. Boulanger, C. Hébert, P. Desrosiers, A. Allard and D. Fortin
PLOS Climate 2, e0000179 (2023)
Full text
|
bioRxiv
Limits of Individual Consent and Models of Distributed Consent in Online Social Networks
J. Lovato, A. Allard, R. Harp, J. Onaolapo and L. Hébert-Dufresne
FAccT'22: 2022 ACM Conference on Fairness, Accountability, and Transparency 2251–2262 (2022)
Full text
|
arXiv
|
code
Predicting the diversity of early epidemic spread on networks
A. J. Allen, M. C. Boudreau, N. J. Roberts, A. Allard and L. Hébert-Dufresne
Physical Review Research 4, 013123 (2022)
Full text
|
arXiv
Influential groups for seeding and sustaining nonlinear contagion in heterogeneous hypergraphs
G. St-Onge, I. Iacopini, V. Latora, A. Barrat, G. Petri, A. Allard and L. Hébert-Dufresne
Communications Physics 5, 25 (2022)
Full text
|
arXiv
Universal Nonlinear Infection Kernel from Heterogeneous Exposure on Higher-Order Networks
G. St-Onge, H. Sun, A. Allard, L. Hébert-Dufresne and G. Bianconi
Physical Review Letters 127, 158301 (2021)
Full text
|
arXiv
Deep learning of contagion dynamics on complex networks
C. Murphy, E. Laurence and A. Allard
Nature Communications 12, 4720 (2021)
Full text
|
arXiv
|
code
|
data
★ Nature communications’ Editors’ Highlights
Social confinement and mesoscopic localization of epidemics on networks
G. St-Onge, V. Thibeault, A. Allard, L. J. Dubé and L. Hébert-Dufresne
Physical Review Letters 126, 098301 (2021)
Full text
|
arXiv
Master equation analysis of mesoscopic localization in contagion dynamics on higher-order networks
G. St-Onge, V. Thibeault, A. Allard, L. J. Dubé and L. Hébert-Dufresne
Physical Review E 103, 032301 (2021)
Full text
|
arXiv
La modélisation mathématique pour cartographier le complexe et l'inconnu
(Mapping the complex and the unknown with mathematical modeling)
A. Allard, L. J. Dubé and L. Hébert-Dufresne
ACFAS Magazine (2020)
Superspreading events in the transmission dynamics of SARS-CoV-2: Opportunities for interventions and control
B. M. Althouse, E. A. Wenger, J. C. Miller, S. V. Scarpino, A. Allard, L. Hébert-Dufresne and H. Hu
PLOS Biology 18, e3000897 (2020)
Full text
|
arXiv
Beyond R0: heterogeneity in secondary infections and probabilistic epidemic forecasting
L. Hébert-Dufresne, B. M. Althouse, S. V. Scarpino and A. Allard
Journal of the Royal Society Interface 17, 20200393 (2020)
Full text
|
arXiv
|
medRxiv
Geometric renormalization unravels self-similarity of the multiscale human connectome
M. Zheng, A. Allard, P. Hagmann, Y. Alemán-Gómez and M. Á. Serrano
Proceedings of the National Academy of Sciences USA 117, 20244 (2020)
Full text
|
arXiv
COVID-19: Cancel your next large event, and tell your friends to cancel theirs
G. St-Onge, V. Thibeault, A. Allard, L. J. Dubé and L. Hébert-Dufresne
medium.com
Genome-scale modeling of metabolism in the polar diatom Fragilariopsis cylindrus underscores the strong robustness of growth rate in response to cellular perturbations
M. Lavoie, B. Saint-Béat, J. Strauss, S. Guérin, A. Allard, S. V. Hardy, A. Falciatore and J. Lavaud
Biology 9, 30 (2020)
Full text
Navigable maps of structural brain networks across species
A. Allard and M. Á. Serrano
PLOS Computational Biology 16, e1007584 (2020)
Full text
|
arXiv
|
data
2010s
Mercator: uncovering faithful hyperbolic embeddings of complex networks
G. García-Pérez*, A. Allard*, M. Á. Serrano and M. Boguñá
New Journal of Physics 21, 123033 (2019)
Full text
|
arXiv
|
code
Smeared phase transition of percolation on real complex networks
L. Hébert-Dufresne and A. Allard
Physical Review Research 1, 013009 (2019)
Full text
|
arXiv
Percolation and the effective structure of complex networks
A. Allard and L. Hébert-Dufresne
Physical Review X 9, 011023 (2019)
Full text
|
arXiv
|
code
A new approach to international trade from Network Geometry: The World Trade Atlas 1870-2013
G. García-Pérez, M. Boguñá, A. Allard, and M. Á. Serrano
S. Gorgoni, A. Amighini, and M. Smith (Eds.), Vernon Press, ISBN 978-1622730650
Table of contents
Geometric evolution of complex networks with degree correlations
C. Murphy, A. Allard, E. Laurence, G. St-Onge and L. J. Dubé
Physical Review E 97, 032309 (2018)
Full text
|
arXiv
The risk of sustained sexual transmission of Zika is underestimated
A. Allard*, B. M. Althouse*, L. Hébert-Dufresne* and S. V. Scarpino*
PLOS Pathogens 13, e1006633 (2017)
Full text
|
bioRxiv
Asymmetric percolation drives a double transition in sexual contact networks
A. Allard, B. M. Althouse, S. V. Scarpino and L. Hébert-Dufresne
Proceedings of the National Academy of Sciences USA 114, 8969-8973 (2017)
Full text
|
arXiv
Strategic tradeoffs in competitor dynamics on adaptive networks
L. Hébert-Dufresne, A. Allard, P.-A. Noël, J.-G. Young and E. Libby
Scientific Reports 7, 7576 (2017)
Full text
|
arXiv
The geometric nature of weights in real complex networks
A. Allard, M. Á. Serrano, G. García-Pérez and M. Boguñá
Nature Communications 8, 14103 (2017)
Full text
|
arXiv
★ Nature Phys. Research Highlights
★ Features in Nature Communications' web collection on complex systems
Growing networks of overlapping communities with internal structure
J.-G. Young, L. Hébert-Dufresne, A. Allard, and L. J. Dubé
Physical Review E 94, 022317 (2016)
Full text
|
arXiv
|
code
Multi-scale structure and topological anomaly detection via a new network statistic: The onion decomposition
L. Hébert-Dufresne, J. A. Grochow, and A. Allard
Scientific Reports 6, 31708 (2016)
Full text
|
arXiv
|
code
The effect of a prudent adaptive behaviour on disease transmission
S. V. Scarpino, A. Allard, L. Hébert-Dufresne
Nature Physics 12, 1042-1046 (2016)
Full text
|
arXiv
★ Nature Phys. News & Views
Constrained growth of complex scale-independent systems
L. Hébert-Dufresne, A. Allard, J.-G. Young, and L. J. Dubé
Physical Review E 93, 032304 (2016)
Full text
|
arXiv
★ In the Editors' Suggestions section of Physical Review E.
The hidden hyperbolic geometry of international trade: World Trade Atlas 1870-2013
G. García-Pérez, M. Boguñá, A. Allard, and M. Á. Serrano
Scientific Reports 6, 33441 (2016)
Full text
|
arXiv
|
Interactive map
★ Featured in the section Economía of the newspaper El Periódico.
Complex networks as an emerging property of hierarchical preferential attachment
L. Hébert-Dufresne, E. Laurence, A. Allard, J.-G. Young and L. J. Dubé
Physical Review E 92, 062809 (2015)
Full text
|
arXiv
|
code
General and exact approach to percolation on random graphs
A. Allard, L. Hébert-Dufresne, J.-G. Young and L. J. Dubé
Physical Review E 92, 062807 (2015)
Full text
|
arXiv
A shadowing problem in the detection of overlapping communities: lifting the resolution limit through a cascading procedure
J.-G. Young, A. Allard, L. Hébert-Dufresne and L. J. Dubé
PLOS ONE 10, e0140133 (2015)
Full text
|
arXiv
|
code
The Social Zombie: Modelling undead outbreaks on social networks
L. Hébert-Dufresne, V. Marceau, P.-A. Noël, A. Allard, and L. J. Dubé
Robert Smith? (Ed.), University of Ottawa Press, ISBN 978-0776622101
Table of contents
Spreading dynamics on complex networks: a general stochastic approach
P.-A. Noël, A. Allard, L. Hébert-Dufresne, V. Marceau and L. J. Dubé
Journal of Mathematical Biology 69, 1627 (2014)
Full text
|
arXiv
A system-level model for the microbial regulatory genome
A. N. Brooks, D. J. Reiss, A. Allard, W.-J. Wu, D. M. Salvanha, C. L. Plaisier, S. Chandrasekaran, M. Pan, A. Kaur and N. S. Baliga
Molecular Systems Biology 10, 740 (2014)
Full text
Coexistence of phases and the observability of random graphs
A. Allard, L. Hébert-Dufresne, J.-G. Young and L. J. Dubé
Physical Review E 89, 022801 (2014)
Full text
|
arXiv
★ In the Editors' Suggestions section of Physical Review E.
Percolation sur graphes aléatoires: Modélisation et description analytique
(Percolation on random graphs: Modelling and analytical description)
Ph.D. Thesis, Université Laval (2014)
Full text
Percolation on random networks with arbitrary k-core structure
L. Hébert-Dufresne*, A. Allard*, J.-G. Young and L. J. Dubé
Physical Review E 88, 062820 (2013)
Full text
|
arXiv
Global efficiency of local immunization of complex networks
L. Hébert-Dufresne*, A. Allard*, J.-G. Young* and L. J. Dubé
Scientific Reports 3, 2171 (2013)
Full text
|
arXiv
Bond percolation on a class of correlated and clustered random graphs
A. Allard, L. Hébert-Dufresne, P.-A. Noël, V. Marceau and L. J. Dubé
Journal of Physics A 45, 405005 (2012)
Full text
|
arXiv
Exact solution of bond percolation on small arbitrary graphs
A. Allard, L. Hébert-Dufresne, P.-A. Noël, V. Marceau and L. J. Dubé
Europhysics Letters (EPL) 98, 16001 (2012)
Full text
|
arXiv
Propagation on networks: An exact alternative perspective
P.-A. Noël, A. Allard, L. Hébert-Dufresne, V. Marceau and L. J. Dubé
Physical Review E 85, 031118 (2012)
Full text
|
arXiv
Structural preferential attachment: Stochastic process for the growth of scale-free, modular and self-similar systems
L. Hébert-Dufresne, A. Allard, V. Marceau, P.-A. Noël and L. J. Dubé
Physical Review E 85, 026108 (2012)
Full text
|
arXiv
|
code
Structural Preferential Attachment: Network Organization beyond the Link
L. Hébert-Dufresne, A. Allard, V. Marceau, P.-A. Noël and L. J. Dubé
Physical Review Letters 107, 158702 (2011)
Full text
|
arXiv
|
code
Modeling the dynamical interaction between epidemics on overlay networks
V. Marceau, P.-A. Noël, L. Hébert-Dufresne, A. Allard and L. J. Dubé
Physical Review E 84, 026105 (2011)
Full text
|
arXiv
Propagation dynamics on networks featuring complex topologies
L. Hébert-Dufresne, P.-A. Noël, V. Marceau, A. Allard and L. J. Dubé
Physical Review E 82, 036115 (2010)
Full text
|
arXiv
★ Also in the Virtual Journal of Biological Physics Research, issue 7, vol. 20 (2010)
Adaptive networks: Coevolution of disease and topology
V. Marceau, P.-A. Noël, L. Hébert-Dufresne, A. Allard and L. J. Dubé
Physical Review E 82, 036116 (2010)
Full text
|
arXiv
★ Also in the Virtual Journal of Biological Physics Research, issue 7, vol. 20 (2010)
2000s
Heterogeneous Bond Percolation on Multitype Networks with an Application to Epidemic Dynamics
A. Allard, P.-A. Noël, L. J. Dubé and B. Pourbohloul
Physical Review E 79, 036113 (2009)
Full text
|
arXiv
★ Also in the Virtual Journal of Biological Physics Research, issue 7, vol. 17 (2009)
Des Ponts d'Euler à la Grippe Aviaire: De l'abstraction mathématique à la réalité sociale des épidémies
(From Euler Bridges to the Avian Flu: From Mathematical Abstraction to the Social Reality of Epidemics)
A. Allard, P.-A. Noël, and L. J. Dubé
Accromath 4, 24-29 (2009)
Full text
Modélisation Mathématique en Epidémiologie par Réseaux de Contacts: Introduction de l'Hétérogénéité dans la Transmissibilité
(Mathematical Modelling in Contact Networks for Epidemiology: Introduction of Heterogenity in Transmissibility)
M.Sc. Thesis, Université Laval (2008)
Full text