Nicolas Gast

Identifiants chercheurs

IdHAL :

nicolas-gast

ORCID :

0000-0001-6884-8698

IdRef :

233247874

Présentation

Publications

Article dans une revue (32)

Boltzmann social learning with heterogeneous rationality Sylvie Chaddad,Yezekael Hayel,Vineeth Varma,Nicolas Gast Nonlinear Analysis: Hybrid Systems, 2026, 61, pp.101718. ⟨10.1016/j.nahs.2026.101718⟩ Article dans une revue hal-05583966v1
Accuracy of the Graphon Mean Field Approximation for Interacting Particle Systems Sebastian Allmeier,Nicolas Gast Stochastic Systems, 2025, 15 (4), pp.273-290. ⟨10.1287/stsy.2024.0070⟩ Article dans une revue hal-05457094v1
Approximations to Study the Impact of the Service Discipline in Systems with Redundancy Nicolas Gast,Benny van Houdt Proceedings of the ACM on Measurement and Analysis of Computing Systems , 2024, 8 (1), pp.1-32. ⟨10.1145/3639040⟩ Article dans une revue hal-04390014v1
Linear Program-Based Policies for Restless Bandits: Necessary and Sufficient Conditions for (Exponentially Fast) Asymptotic Optimality Nicolas Gast,Bruno Gaujal,Chen Yan Mathematics of Operations Research, 2023, pp.1-29. ⟨10.1287/moor.2022.0101⟩ Article dans une revue hal-03262307v4
Exponential Asymptotic Optimality of Whittle Index Policy. Nicolas Gast,Bruno Gaujal,Chen Yan Queueing Systems, 2023, 104, pp.1-44. ⟨10.1007/s11134-023-09875-x⟩ Article dans une revue hal-03041176v2
Bias and Refinement of Multiscale Mean Field Models Sebastian Allmeier,Nicolas Gast Proceedings of the ACM on Measurement and Analysis of Computing Systems , 2023, 7 (1), pp.1-29. ⟨10.1145/3579336⟩ Article dans une revue hal-03981002v1
Testing Indexability and Computing Whittle and Gittins Index in Subcubic Time Nicolas Gast,Bruno Gaujal,Kimang Khun Mathematical Methods of Operations Research, 2023, ⟨10.1007/s00186-023-00821-4⟩ Article dans une revue hal-03602458v5
Learning algorithms for Markovian Bandits: Is Posterior Sampling more Scalable than Optimism? Nicolas Gast,Bruno Gaujal,Kimang Khun Transactions on Machine Learning Research Journal, 2022 Article dans une revue hal-03262006v3
Mean Field and Refined Mean Field Approximations for Heterogeneous Systems: It Works! Sebastian Allmeier,Nicolas Gast Proceedings of the ACM on Measurement and Analysis of Computing Systems , 2022, 6 (1), pp.1-43. ⟨10.1145/3508033⟩ Article dans une revue hal-03600672v1
Why (and When) do Asymptotic Methods Work so well? Nicolas Gast Queueing Systems, 2022, 100, pp.297-299. ⟨10.1007/s11134-022-09834-y⟩ Article dans une revue hal-03638310v1
Analysis of Work Stealing with latency Nicolas Gast,Mohammed Khatiri,Denis Trystram,Frédéric Wagner Journal of Parallel and Distributed Computing, 2021, 153, pp.119-129. ⟨10.1016/j.jpdc.2021.03.010⟩ Article dans une revue hal-03356234v1
On fair selection in the presence of implicit and differential variance Vitalii Emelianov,Nicolas Gast,Krishna P Gummadi,Patrick Loiseau Artificial Intelligence (AIJ), 2021, 302, pp.1-20. ⟨10.1016/j.artint.2021.103609⟩ Article dans une revue hal-03398739v1
Linear Regression from Strategic Data Sources Nicolas Gast,Stratis Ioannidis,Patrick Loiseau,Benjamin Roussillon ACM Transactions on Economics and Computation, 2020, 8 (2), pp.1-24. ⟨10.1145/3391436⟩ Article dans une revue hal-02982682v1
Performance analysis methods for list-based caches with non-uniform access Giuliano Casale,Nicolas Gast IEEE/ACM Transactions on Networking, 2020, pp.1-18. ⟨10.1109/TNET.2020.3042869⟩ Article dans une revue hal-03102188v1
A Mean Field Game Analysis of SIR Dynamics with Vaccination Josu Doncel,Nicolas Gast,Bruno Gaujal Probability in the Engineering and Informational Sciences, 2020, pp.1-18. ⟨10.1017/S0269964820000522⟩ Article dans une revue hal-01496885v2
Discrete Mean Field Games: Existence of Equilibria and Convergence Josu Doncel,Nicolas Gast,Bruno Gaujal Journal of Dynamics and Games, 2019, 6 (3), pp.1-19. ⟨10.3934/jdg.2019016⟩ Article dans une revue hal-01277098v2
Size Expansions of Mean Field Approximation: Transient and Steady-State Analysis Nicolas Gast,Luca Bortolussi,Mirco Tribastone Performance Evaluation, 2019, 129, pp.60-80. ⟨10.1016/j.peva.2018.09.005⟩ Article dans une revue hal-01891632v1
A refined mean field approximation of synchronous discrete-time population models Nicolas Gast,Diego Latella,Mieke Massink Performance Evaluation, 2018, pp.1-27. ⟨10.1016/j.peva.2018.05.002⟩ Article dans une revue hal-01845235v1
Computing Absorbing Times via Fluid Approximations Nicolas Gast,Bruno Gaujal Advances in Applied Probability, 2017, ⟨10.1017/apr.2017.21⟩ Article dans une revue hal-01553138v1
TTL Approximations of the Cache Replacement Algorithms LRU(m) and h-LRU Nicolas Gast,Benny van Houdt Performance Evaluation, 2017, ⟨10.1016/j.peva.2017.09.002⟩ Article dans une revue hal-01622059v1
A Refined Mean Field Approximation Nicolas Gast,Benny van Houdt Proceedings of the ACM on Measurement and Analysis of Computing Systems , 2017, 1 (28), ⟨10.1145/3152542⟩ Article dans une revue hal-01622054v1
Attribution mechanisms for ancillary service costs induced by variability in power delivery Francesca Bona,Nicolas Gast,Jean-Yves Le Boudec,Pierre Pinson,Dan-Cristian Tomozei IEEE Transactions on Power Systems, 2016, pp.10. ⟨10.1109/TPWRS.2016.2598760⟩ Article dans une revue hal-01403913v1
Transient and Steady-state Regime of a Family of List-based Cache Replacement Algorithms Nicolas Gast,Benny van Houdt Queueing Systems, 2016, Special Issue: SIGMETRICS 2015, ⟨10.1007/s11134-016-9487-9⟩ Article dans une revue hal-01334354v1
Optimal Generation and Storage Scheduling in the Presence of Renewable Forecast Uncertainties Nicolas Gast,Dan-Cristian Tomozei,Jean-Yves Le Boudec IEEE Transactions on Smart Grid, 2014, pp.12. ⟨10.1109/TSG.2013.2285395⟩ Article dans une revue hal-01086022v1
Incentives and redistribution in homogeneous bike-sharing systems with stations of finite capacity Christine Fricker,Nicolas Gast EURO Journal on Transportation and Logistics, 2014, pp.31. ⟨10.1007/s13676-014-0053-5⟩ Article dans une revue hal-01086009v1
MPTCP is not Pareto-Optimal: Performance Issues and a Possible Solution Ramin Khalili,Nicolas Gast,Miroslav Popovic,Jean-Yves Le Boudec IEEE/ACM Transactions on Networking, 2013, pp.15. ⟨10.1109/TNET.2013.2274462⟩ Article dans une revue hal-01086030v1
Decentralized List Scheduling Marc Tchiboukdjian,Nicolas Gast,Denis Trystram Annals of Operations Research, 2012, ⟨10.1007/s10479-012-1149-7⟩ Article dans une revue hal-00796248v1
Markov chains with discontinuous drifts have differential inclusion limits Nicolas Gast,Bruno Gaujal Performance Evaluation, 2012, 69 (12), pp.623-642. ⟨10.1016/j.peva.2012.07.003⟩ Article dans une revue hal-00787999v1
Mean field for Markov Decision Processes: from Discrete to Continuous Optimization Nicolas Gast,Bruno Gaujal,Jean-Yves Le Boudec IEEE Transactions on Automatic Control, 2012, 57 (9), pp.2266 - 2280. ⟨10.1109/TAC.2012.2186176⟩ Article dans une revue hal-00787996v1
Distributed Delay-Power Control Algorithms for Bandwidth Sharing in Wireless Networks. François Baccelli,Nicholas Bambos,Nicolas Gast IEEE/ACM Transactions on Networking, 2011, 19 (5), pp.1458-1471. ⟨10.1109/TNET.2011.2163079⟩ Article dans une revue hal-00940546v1
A Mean Field Approach for Optimization in Discrete Time Nicolas Gast,Bruno Gaujal Discrete Event Dynamic Systems, 2011, 21, pp.63-101. ⟨10.1007/s10626-010-0094-3⟩ Article dans une revue istex hal-00788770v1
Infinite labeled trees: From rational to Sturmian trees Nicolas Gast,Bruno Gaujal Theoretical Computer Science, 2010, 411, pp.1146 - 1166. ⟨10.1016/j.tcs.2009.12.009⟩ Article dans une revue hal-01086034v1

Communication dans un congrès (38)

Model-Based Learning of Whittle indices Joël Charles-Rebuffé,Nicolas Gast,Bruno Gaujal ROADEF 2026, Université de Tours [UT], Feb 2026, Tours, France Communication dans un congrès hal-05534854v1
Prophet Inequalities: Competing with the Top $\ell$ Items is Easy Mathieu Molina,Nicolas Gast,Patrick Loiseau,Vianney Perchet SODA 2025 - ACM-SIAM Symposium on Discrete Algorithms, Jan 2025, New Orleans, United States. pp.1-45 Communication dans un congrès hal-04912640v1
Model Predictive Control is Almost Optimal for Restless Bandit Nicolas Gast,Dheeraj Narasimha COLT 2025 - 38th Annual Conference on Learning Theory, Jun 2025, Lyon, France. pp.1-35, ⟨10.48550/arXiv.2410.06307⟩ Communication dans un congrès hal-05194338v1
Computing the Bias of Constant-step Stochastic Approximation with Markovian Noise Sebastian Allmeier,Nicolas Gast NeurIPS 2024 -38th Annual Conference on Neural Information Processing Systems, Dec 2024, Vancouver, Canada. pp.1-23 Communication dans un congrès hal-04837291v1
Trading-off price for data quality to achieve fair online allocation Mathieu Molina,Nicolas Gast,Patrick Loiseau,Vianney Perchet NeurIPS 2023 - 37th Conference on Neural Information Processing Systems, Dec 2023, New orleans, USA, United States. pp.1-43 Communication dans un congrès hal-04360656v1
What is an Optimal Policy in Time-Average MDP? Nicolas Gast,Bruno Gaujal,Kimang Khun ACM SIGMETRICS Workshop MAMA, Jun 2023, Orlando (FL), United States. pp.30-32, ⟨10.1145/3626570.3626582⟩ Communication dans un congrès hal-04696993v1
Decentralized model-free reinforcement learning in stochastic games with average-reward objective Romain Cravic,Nicolas Gast,Bruno Gaujal AAMAS 2023 - International Conference on Autonomous Agents and Multiagent Systems, May 2023, London (U.K.), United Kingdom. pp.1-13 Communication dans un congrès hal-04161628v1
Fairness in Selection Problems with Strategic Candidates Vitalii Emelianov,Nicolas Gast,Patrick Loiseau EC 2022 - 23th ACM Conference on Economics and Computation, Jul 2022, Boulder, Colorado, United States. pp.1-29, ⟨10.1145/3490486.3538287⟩ Communication dans un congrès hal-03677966v1
Experiments in Operations Research are Hardly Reproducible: A Bike-Sharing Case-Study. Thomas Barzola,Van-Dat Cung,Nicolas Gast,Vincent Jost 23ème congrès annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, INSA Lyon, Feb 2022, Villeurbanne - Lyon, France Communication dans un congrès hal-03595289v1
Asymptotic Degradation of Linear Regression Estimates with Strategic Data Sources Benjamin Roussillon,Nicolas Gast,Patrick Loiseau,Panayotis Mertikopoulos ALT 2022 - 33rd International Conference on Algorithmic Learning Theory, Mar 2022, Paris, France. pp.1-31 Communication dans un congrès hal-03593516v1
Vaccination in a Large Population: Mean Field Equilibrium versus Social Optimum Bruno Gaujal,Josu Doncel,Nicolas Gast NETGCOOP 2021 - 10th International Conference on NETwork Games, COntrol and OPtimization, Sep 2021, Cargèse, France. pp.1-9 Communication dans un congrès hal-02938850v1
rmftool - A library to Compute (Refined) Mean Field Approximation(s) Sebastian Allmeier,Nicolas Gast TOSME 2021 - Workshop on TOols for Stochastic Modeling and Evaluation, Nov 2021, Online conference, France Communication dans un congrès hal-03485044v1
On Fair Selection in the Presence of Implicit Variance Vitalii Emelianov,Nicolas Gast,Krishna P. Gummadi,Patrick Loiseau EC 2020 - Twenty-First ACM Conference on Economics and Computation, Jul 2020, Budapest, Hungary. pp.649-675, ⟨10.1145/3391403.3399482⟩ Communication dans un congrès hal-02880578v1
Collisions groupées lors du mécanisme d'évitement de collisions de CPL-G3 Mouhcine Mendil,Nicolas Gast,Henry-Joseph Audéoud CoRes 2020 - Rencontres Francophones sur la Conception de Protocoles, l’Évaluation de Performance et l’Expérimentation des Réseaux de Communication, Sep 2020, Lyon, France. pp.1-4 Communication dans un congrès hal-02879294v1
ASGriDS: Asynchronous Smart-Grids Distributed Simulator Takai-Eddine Kennouche,Florent Cadoux,Nicolas Gast,Benoît Vinot APPEEC 2019 - 11th IEEE PES Asia-Pacific Power and Energy Engineering Conference, Dec 2019, Macao, Macau SAR China. pp.1-5 Communication dans un congrès hal-02384051v1
UTOPIC: Under-Approximation Through Optimal Control Josu Doncel,Nicolas Gast,Mirco Tribastone,Max Tschaikowski,Andrea Vandin QEST 2019 - 16th International Conference on Quantitative Evaluation of SysTems, Sep 2019, Glasgow, United Kingdom. pp.277-291, ⟨10.1007/978-3-030-30281-8_16⟩ Communication dans un congrès hal-02283189v1
The Price of Local Fairness in Multistage Selection Vitalii Emelianov,George Arvanitakis,Nicolas Gast,Krishna P Gummadi,Patrick Loiseau IJCAI-2019 - Twenty-Eighth International Joint Conference on Artificial Intelligence, Aug 2019, Macao, France. pp.5836-5842, ⟨10.24963/ijcai.2019/809⟩ Communication dans un congrès hal-02145071v1
A Refined Mean Field Approximation Nicolas Gast,Benny Van Houdt ACM SIGMETRICS 2018, Jun 2018, Irvine, United States. pp.1 Communication dans un congrès hal-01891642v1
A Refined Mean Field Approximation for Synchronous Population Processes Nicolas Gast,Diego Latella,Mieke Massink MAMA 2018Workshop on MAthematical performance Modeling and Analysis, Jun 2018, Irvine, United States. pp.1-3 Communication dans un congrès hal-01891629v1
Size Expansions of Mean Field Approximation: Transient and Steady-State Analysis Nicolas Gast,Luca Bortolussi,Mirco Tribastone 2018 - 36th International Symposium on Computer Performance, Modeling, Measurements and Evaluation, Dec 2018, Toulouse, France. pp.1-2, ⟨10.1016/j.peva.2018.09.005⟩ Communication dans un congrès hal-01891636v1
Congestion Avoidance in Low-Voltage Networks by using the Advanced Metering Infrastructure Benoit Vinot,Florent Cadoux,Nicolas Gast ePerf 2018 - IFIP WG PERFORMANCE - 36th International Symposium on Computer Performance, Modeling, Measurements and Evalution, Dec 2018, Toulouse, France. pp.1-3 Communication dans un congrès hal-01953386v1
Expected Values Estimated via Mean-Field Approximation are 1/N-Accurate Nicolas Gast ACM SIGMETRICS / International Conference on Measurement and Modeling of Computer Systems SIGMETRICS '17 , Jun 2017, Urbana-Champaign, United States. pp.26, ⟨10.1145/2896377.2901463⟩ Communication dans un congrès hal-01553133v1
Asymptotically Exact TTL-Approximations of the Cache Replacement Algorithms LRU(m) and h-LRU Nicolas Gast,Benny van Houdt 28th International Teletraffic Congress (ITC 28), Sep 2016, Würzburg, Germany Communication dans un congrès hal-01292269v1
Mean Field Approximation of Uncertain Stochastic Models Luca Bortolussi,Nicolas Gast 46th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN 2016), Jun 2016, Toulouse, France Communication dans un congrès hal-01302416v1
Construction of Lyapunov functions via relative entropy with application to caching Nicolas Gast The 18th Workshop on MAthematical performance Modeling and Analysis, Jun 2016, Nice, France Communication dans un congrès hal-01321017v2
Are mean-field games the limits of finite stochastic games? Josu Doncel,Nicolas Gast,Bruno Gaujal The 18th Workshop on MAthematical performance Modeling and Analysis, Jun 2016, Nice, France Communication dans un congrès hal-01321020v1
Probabilistic Forecasts of Bike-Sharing Systems for Journey Planning Nicolas Gast,Guillaume Massonnet,Daniël Reijsbergen,Mirco Tribastone The 24th ACM International Conference on Information and Knowledge Management (CIKM 2015), Oct 2015, Melbourne, Australia. ⟨10.1145/2806416.2806569⟩ Communication dans un congrès hal-01185840v1
Transient and Steady-state Regime of a Family of List-based Cache Replacement Algorithms Nicolas Gast,Benny van Houdt ACM SIGMETRICS 2015, Jun 2015, Portland, United States. ⟨10.1145/2745844.2745850⟩ Communication dans un congrès hal-01143838v1
The Power of Two Choices on Graphs: the Pair-Approximation is Accurate Nicolas Gast Workshop on MAthematical performance Modeling and Analysis, Jun 2015, Portland, United States Communication dans un congrès hal-01199271v1
Impact of Demand-Response on the Efficiency and Prices in Real-Time Electricity Markets Nicolas Gast,Jean-Yves Le Boudec,Dan-Cristian Tomozei ACM e-Energy 2014, Jun 2014, Cambridge, United Kingdom. ⟨10.1145/2602044.2602052⟩ Communication dans un congrès hal-01086036v1
Impact of Storage on the Efficiency and Prices in Real-Time Electricity Markets Nicolas Gast,Jean-Yves Leboudec,Alexandre Proutière,Dan-Cristian Tomozei ACM e-Energy, May 2013, Berkeley, United States. pp.12, ⟨10.1145/2487166.2487169⟩ Communication dans un congrès hal-00920091v1
MPTCP is not pareto-optimal : performance issues and a possible solution. Ramin Khalili,Nicolas Gast,Miroslav Popovic,Utkarsh Upadhyay,Jean-Yves Le Boudec ACM CoNEXT 2012, Dec 2012, Nice, France. pp.1, ⟨10.1145/2413176.2413178⟩ Communication dans un congrès hal-01086043v1
Mean field analysis for inhomogeneous bike sharing systems Christine Fricker,Nicolas Gast,Hanene Mohamed AofA, Jul 2012, Montreal, Canada. ⟨10.46298/dmtcs.3006⟩ Communication dans un congrès hal-01086055v1
Mean field limit of non-smooth systems and differential inclusions Nicolas Gast,Bruno Gaujal MAthematical performance Modeling and Analysis (MAMA), 2010, New-York, United States. pp.30-32, ⟨10.1145/1870178.1870189⟩ Communication dans un congrès hal-00788863v1
A Mean Field Model of Work Stealing in Large-Scale Systems Nicolas Gast,Bruno Gaujal ACM sigmetrics, 2010, New-York, United States. pp.13-24, ⟨10.1145/1811039.1811042⟩ Communication dans un congrès hal-00788862v1
A Tighter Analysis of Work Stealing Marc Tchiboukdjian,Nicolas Gast,Denis Trystram,Jean-Louis Roch,Julien Bernard The 21st International Symposium on Algorithms and Computation (ISAAC), 2010, Jeju Island, South Korea. pp.291-302, ⟨10.1007/978-3-642-17514-5_25⟩ Communication dans un congrès istex hal-00788864v1
Mean field limits for controlled system Nicolas Gast NET-COOP 2010 - 4th Workshop on Network Control and Optimization, Nov 2010, Ghent, Belgium Communication dans un congrès inria-00597572v1
A Mean Field Approach for Optimization in Particle Systems and Applications Nicolas Gast,Bruno Gaujal Fourth International Conference on Performance Evaluation Methodologies and Tools, Valuetools, 2009, Pisa, Italy. pp.10, ⟨10.4108/ICST.VALUETOOLS2009.7477⟩ Communication dans un congrès hal-00788908v1

Chapitre d'ouvrage (1)

Mean-Field Limits Beyond Ordinary Differential Equations Luca Bortolussi,Nicolas Gast Bernardo, Marco; De Nicola, Rocco; Hillston, Jane. Formal Methods for the Quantitative Evaluation of Collective Adaptive Systems, Programming and Software Engineering, , 2016, 978-3-319-34095-1. ⟨10.1007/978-3-319-34096-8_3⟩ Chapitre d'ouvrage hal-01334358v1

Pré-publication, Document de travail (5)

Boltzmann social learning with heterogeneous rationality Sylvie Chaddad,Yezekael Hayel,Vineeth Varma,Nicolas Gast 2026 Pré-publication, Document de travail (preprint/prepublication) hal-05528351v1
Integrating Aggregated Electric Vehicle Flexibilities in Unit Commitment Models using Submodular Optimization Hélène Arvis,Olivier Beaude,Nicolas Gast,Stéphane Gaubert,Bruno Gaujal 2025 Pré-publication, Document de travail hal-05399441v1
Reoptimization Nearly Solves Weakly Coupled Markov Decision Processes Nicolas Gast,Bruno Gaujal,Chen Yan 2024 Pré-publication, Document de travail hal-04570177v1
Congestion Avoidance in Low-Voltage Networks by using the Advanced Metering Infrastructure Benoît Vinot,Florent Cadoux,Nicolas Gast,Rodolphe Heliot,Victor Gouin 2018 Pré-publication, Document de travail hal-01784386v1
Computing absorbing times via fluid approximations Nicolas Gast,Bruno Gaujal 2016 Pré-publication, Document de travail hal-01337950v1

Rapport (7)

Markov chains with discontinuous drifts have differential inclusions limits. Application to stochastic stability and mean field approximation. Nicolas Gast,Bruno Gaujal [Research Report] RR-7315, INRIA. 2012 Rapport (rapport de recherche) inria-00491859v4
Mean field for Markov Decision Processes: from Discrete to Continuous Optimization Nicolas Gast,Bruno Gaujal,Jean-Yves Le Boudec 2010 Rapport hal-00473005v3
Distributing labels on infinite trees Nicolas Gast,Bruno Gaujal [Research Report] RR-6630, INRIA. 2009 Rapport (rapport de recherche) inria-00318872v2
A Mean Field Approach for Optimization in Particles Systems and Applications Nicolas Gast,Bruno Gaujal [Research Report] RR-6877, INRIA. 2009, pp.23 Rapport (rapport de recherche) inria-00368011v3
Balanced Labeled Trees: Density, Complexity and Mechanicity Nicolas Gast,Bruno Gaujal [Research Report] RR-6240, INRIA. 2007, pp.25 Rapport (rapport de recherche) inria-00159564v2
CR-LIBM A library of correctly rounded elementary functions in double-precision Catherine Daramy-Loirat,David Defour,Florent de Dinechin,Matthieu Gallet,Nicolas Gastet al. [Research Report] LIP,. 2006 Rapport (rapport de recherche) ensl-01529804v1
Towards the post-ultimate libm Florent de Dinechin,Nicolas Gast [Research Report] RR-5367, LIP RR 2004-47, INRIA, LIP. 2004, pp.18 Rapport (rapport de recherche) inria-00070636v1

Thèse (1)

Optimization and Control of Large Systems: Fighting the Curse of Dimensionality Nicolas Gast Networking and Internet Architecture [cs.NI]. Université Grenoble Alpes, 2010. English. ⟨NNT : ⟩ Thèse tel-01875211v1

HDR (1)

Refinements of Mean Field Approximation Nicolas Gast Performance [cs.PF]. Université Grenoble Alpes, 2020 HDR tel-02509756v1