Page of Laurent Bourgeois

Laurent
Bourgeois
Teacher / Researcher
Ingénieur de l'Armement
H.D.R. since 2012
PhD defended in 1998

ENSTA UMA
office 2.2.25
Phone : (0) 18 187 2086

Research Activities

Inverse problems, regularization of ill-posed problems. More precisely :

  • wave diffraction problems,
  • method of quasi-reversibility to solve ill-posed Cauchy problems and application to inverse problems,
  • inverse problems related to mechanics of materials,
  • inverse scattering in waveguides with sampling methods,
  • inverse scattering for generalized impedance boundary conditions,
  • uniqueness and stability of ill-posed problems, in particular with Carleman estimates.

Students :

  • Jérémi Dardé (PHD, advisor with F. Jouve)
  • Nicolas Chaulet (PHD, advisor with H. Haddar)
  • Arnaud Recoquillay (PHD, advisor with V. Baronian)
  • Jean-François Fritsch (PHD, advisor with C. Hazard)
  • Raphaël Terrine (PHD, advisor with P. Moireau)
  • Frédérique Le Louer (Post-doc, advisor with E. Lunéville)
  • Anne-Claire Egloffe (Post-doc, advisor with E. Lunéville)
  • Dmitry Ponomarev (Post-doc)

Teachings

  • ENSTA : Basic analysis for partial differential equations,
  • Optimal control of partial differential equations,
  • Fonctions of complex variable,
  • Non-linear materials,
  • Inverse Problems : mathematical analysis and numerical methods (Master 2)
  • Inverse problems governed by PDEs (Master 2)

Papers in peer-reviewed journal

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SIAM Journal on Mathematical Analysis images/icons/doctype_pdf.gif
IMA Journal of Applied Maths images/icons/doctype_pdf.gif
Inverse Problems and Imaging - vol. 17/2 (pp 463-489 ) images/icons/doctype_pdf.gif
M2AN images/icons/doctype_pdf.gif
Inverse Problems and Imaging - vol. 15-2 (pp 285--314 ) images/icons/doctype_pdf.gif
M2AN - vol. 54-2 (pp 493-529 ) images/icons/doctype_pdf.gif
Inverse Problems and Imaging - vol. 14-2 (pp 363-384 ) images/icons/doctype_pdf.gif
SIAM Journal of Applied Maths - vol. 80-3 (pp 1546-1566 ) images/icons/doctype_pdf.gif
Inverse Problems and Imaging - vol. 13-2 (pp 377-400 ) images/icons/doctype_pdf.gif
Communications in Mathematical Sciences - vol. 17/6 (pp 1487 – 1529 ) images/icons/doctype_pdf.gif
M2AN - vol. 52/1 (pp 123-145 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 34/7 (pp 075006 ) images/icons/doctype_pdf.gif
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SIAM Journal of Numerical Analysis - vol. 55/4 (pp 1820-1842 ) images/icons/doctype_pdf.gif
Mathematical Control and Related Fields - vol. 7/3 (pp 347-367 ) images/icons/doctype_pdf.gif
L. Baratchart, L. Bourgeois, J. Leblond
Journal of Functional Analysis - vol. 270/7 (pp 2508-2542 ) images/icons/doctype_pdf.gif
Wave Motion - vol. 66 (pp 68-87 ) images/icons/doctype_pdf.gif
É. Bécache, L. Bourgeois, J. Dardé, L. Franceschini
Inverse Problems and Imaging - vol. 9/4 (pp 971-1002 ) images/icons/doctype_pdf.gif
Inverse Problems and Imaging - vol. 8/1 (pp 23-51 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 30 (pp 095004 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 29 (pp 025017 ) images/icons/doctype_pdf.gif
C. R. Acad. Sci. Paris, Ser. I - vol. 351 (pp 187-190 ) images/icons/doctype_pdf.gif
Siam Journal of Scientific Computing - vol. 34-3 (pp 1824-1848 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 28 (pp 105011 (18pp) ) images/icons/doctype_pdf.gif
Applicable Analysis - vol. 90/10 (pp 1481-1497 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 27 (pp 055001(27pp) ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 27 (pp 095002 ) images/icons/doctype_pdf.gif
Inverse Problems and Imaging - vol. 4-3 (pp 351-377 ) images/icons/doctype_pdf.gif
Applicable Analysis - vol. 89/11 (pp 1745-1768 ) images/icons/doctype_pdf.gif
L. Bourgeois, H. Haddar
Inverse Problems and Imaging - vol. 4-1 (pp 19-38 ) images/icons/doctype_pdf.gif
M2AN - vol. 44 (4) (pp 715-735 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 26 (9) (pp 095016(21pp) ) images/icons/doctype_pdf.gif
Journal of Physics: Conference Series - IOP - vol. 135 (pp 012023 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 24 (1) (pp 015018 ) images/icons/doctype_pdf.gif
Journal of Computational and Applied Mathematics - vol. 204 (2 SPEC) (pp 387-399 ) images/icons/doctype_pdf.gif
C. R. Acad. Sci. Paris, Ser. I - vol. 345 (7) (pp 385-390 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 22 (2) (pp 413-430 ) images/icons/doctype_pdf.gif
Inverse Problems - vol. 21 (3) (pp 1087-1104 ) images/icons/doctype_pdf.gif

Conferences without proceedings

Journées Ondes des Poètes 2024 - Ensta -Palaiseau, 17-19/04/2024 
L. Bourgeois, Fritsch Jean-François, A. Recoquillay
AIP2023 - Goettingen - 4/8-9-2023 
Simulation of data assimilation under a PDE constraint - Laboratoire JLL - Paris - 16/17-11-23 
L. Bourgeois, S. Fliss, Fritsch Jean-François, C. Hazard, A. Recoquillay
Waves conference - Palaiseau - 25/29-7-2022 
PICOF 2022 - 25/27-10-2022 
Quasilinear Equations, Inverse Problems ans their Applications - Sotchi - 23/29-08-2021 
NCMIP Conference, 24/5/2019, ENS Cachan 
Worshop Problèmes Inverses, 6-7/5/2019, UTC Compiègne 
Waves Conference, Vienna, 25-29/08/2019 
Inverse Problems: Modeling and Simulation, Malta, 21-26/05/2018 
Inverse Problems: Theoretical and Numerical Aspects, Reims, 17-19/12/2018 
Conference on Mathematics of Wave Phenomena - Karslruhe - 23-27/07/2018 
13th International Conference on Mathematical and Numerical Aspects of Wave Propagation, University of Minnesota, Minneapolis, May 15−19, 2017 
Workshop Inverse Problems for PDEs, Bremen, Allemagne, 29/3-1/4/2016 
New trends in theoretical and numerical analysis of waveguides, Porquerolles, 16-19/05/2016 
L. Baratchart, L. Bourgeois, J. Leblond
Spectral and Analytic Inverse Problems, IHP, Paris, 4-7/5/2015 
É. Bécache, L. Bourgeois, J. Dardé, L. Franceschini
Inverse Problems in Wave Propagation, Bremen, Allemagne, 7-10/4/2015 
L. Baratchart, L. Bourgeois, J. Leblond
27th IFIP Conference on System Modelling and Optimization, Sophia Antipolis, 29/6-3/7/2015 
Ninth meeting of the European Research Network: wave propagation in complex media for quantitative and Non-Destructive Evaluation 
PICOF 2014, Hammamet (Tunisie), 7-9/5/2014 
Recent progress in theoretical and numerical aspects of inverse problems, CIRM, Marseille, 19-23/5/2014 
Inverse Problems: Scattering, Tomography and Parameter Identification, Conference honoring Andreas Kirsch for his 60th birthday, Bad Herrenalb - Germany, 8-11/4/2013 
Inverse Problems and Nonlinear equations, Ecole Polytechnique, Palaiseau - 22-24/05/2013 
Waves conference, Gammarth, Tunisie, 3-7/6/2013 
Journée "Problèmes inverses" - CNAM - 21/06/2012 
Control of Fluid-Structure Systems and Inverse problems - Toulouse - 25-28/06/2012 
PICOF'12, Palaiseau, France 
Conférence Applied Inverse Problems 2011, College Station, Texas, 23-27/05/2011 
Workshop on Inverse Problems for Waves: Methods and Applications, Palaiseau, 29-30/3/2010 
ECCM 2010 : IV european conference on computational mechanics, 16-21/5/2010 
Trimestre sur le contrôle des EDP et applications, Journée thématique "Inverse Problems", IHP, Paris, 1/10-18/12/2010 
L. Bourgeois, H. Haddar
Conférence Applied Inverse Problems 2009, Université de Vienne, Vienne (Autriche), 20-24/7/2009 
Premier congrès de la SM2A, Rabat (Maroc), 6-8/02/2008 
Conférence ICIPE 2008, VVF Dourdan, Dourdan (France), 15-19/6/2008 
Conférence ICIAM 2007, ETH, Zürich (Suisse), 16-20/7/2007 
Conférence PICOF 2006, Université de Nice, Nice (France), 5-7/4/2006 
Conférence Waves 2005, Brown University, Providence (USA), 20-24/6/2005 
8èmes Journées d'Analyse Numérique et Optimisation, ENIM, Rabat (Maroc), 14-16/12/2005 
Journées Melina, Le Croisic