Lalonde, François

Professeur titulaire

Doctorat d'État, Paris-Sud (Orsay) 1985

Contact :

  • Téléphone 514-343-6707 Pav. André-Aisenstadt \ bur. AA-6143

Intérêts de recherche


CV

Summary of Vitae

Mes travaux les plus récents se rapportent à la topologie symplectique et aux systèmes hamiltoniens ainsi qu'à une théorie de Floer universelle des lagrangiennes, sujet qui a fait l'objet d'un intense développement depuis une vingtaine d'années. La topologie (ou géométrie) symplectique est l'étude mathématique des espaces courbes, de dimension paire arbitraire, munis d'une forme symplectique, analogue anti-symétrique d'une métrique riemannienne, qui donne à ces espaces la structure qu'il faut pour donner un sens aux lois de la physique aussi bien qu'aux procédés de quantification (passage du classique au quantique). Ce sujet est le versant mathématique de ce que les physiciens appellent la théorie des super-cordes. Son développement a attiré l'attention des physiciens (Witten, Vafa) aussi bien que celle des mathématiciens (Gromov, Donaldson), et les méthodes employées ont suivi une évolution rapide au cours des dernières années. La plupart de mes travaux porte sur les aspects dits ``hard'' de la topologie symplectique et des systèmes hamiltoniens, en se servant de techniques topologiques, géométriques et analytiques, en particulier des méthodes d'équations aux dérivées partielles elliptiques et de la cohomologie quantique. Ces méthodes sont fondées sur l'étude du comportement de différents espaces de modules de courbes pseudoholomorphes, qui sont solutions d'équations de Cauchy-Riemann généralisées associées à une structure presque complexe.


Articles choisis

  • F. Lalonde and Y. Savelyev, The Hofer Geometry of Surfaces, preprint, (2012)
  • S. Hu and F. Lalonde, Non-splitting of certain groups of Hamiltonian diffeomorphisms, preprint, (2011)
  • E. Kerman and F. Lalonde, Minimality in the Hofer geometry of Lagrangians, preprint, (2011)
  • F. Lalonde and A. Teleman, g-areas and commutator length, preprint, (2011)
  • S. Hu, F. Lalonde and R. Leclercq, Homological Lagrangian Monodromy, Geometry and Topology 15 1617-1650 (2011)
  • S. Anjos, F. Lalonde and M. Pinsonnault, The homotopy type of the space of symplectic balls in rational ruled 4-manifolds, Geometry and Topology 13 1177-1227 (2009)
  • S. Hu and F. Lalonde, A relative Seidel morphism and the Albers map, Trans. Amer. Math. Soc. 362 1135-1168 (2009)
  • S. Hu and F. Lalonde, Anti-symplectic involutions and Maslov indices, preprint, 18 pages , (2008)
  • S. Anjos and F. Lalonde, The full homotopy type of symplectic balls in S^2 x S^2 above the critical value, preprint arXiv:math/0406129, 23 pages , (2008)
  • S. Anjos and F. Lalonde, The topology of the space of symplectic balls in S^2 x S^2, C. R. Acad. Sci. Paris, Ser. I 345 639-642 (2007)
  • O. Cornea and F. Lalonde, Cluster homology: an overview of the construction and results, ERA-AMS 12 1-12 (2006)
  • O. Cornea and F. Lalonde, Cluster Homology, 56 pages , ArXiv Math.SG/0508345 (2006)
  • F. Lalonde, Lagrangian submanifolds: from the local model to the cluster complex, Proceedings of the International Congress of Mathematicians 456-477 (2006)
  • F. Lalonde and M. Pinsonnault, The topology of the space of symplectic balls in rational 4-manifolds, Duke Mathematical Journal 122 347-397 (2004)
  • F. Lalonde, A field theory for symplectic fibrations over surfaces with applications, Geometry and Topology 8 1189-1226 (2004)
  • F. Lalonde and D. McDuff, Symplectic structures on fiber bundles, Topology 42 309-347 (2003)
  • E. Kerman and F. Lalonde, Length minimising paths for symplectically aspherical manifolds, Ann. Inst. Fourier 53 1503-1526 (2003)
  • F. Lalonde and D. McDuff, Cohomological properties of ruled symplectic structures on manifolds, Mirror Symmetry IV, AMS/IP Studies in Advanced Mathematics 33 79- (2002)
  • F. Lalonde and M. Pinsonnault, Groupes d'automorphismes et plongements symplectiques de boules dans les variétés rationelles, C.R. Acad. Sci. Paris, Ser. I 335 931-934 (2002)
  • D. Gatien and F. Lalonde, Holomorphic cylinders with Lagrangian boundaries and Hamiltonian dynamics, Duke Mathematical Journal 102 485 (2000)
  • F. Lalonde, D. McDuff and L. Polterovich, Topological rigidity of Hamiltonian loops and quantum homology, Inventiones Mathematicae 135 369-385 (1999)
  • F. Lalonde et C. Pestieau, Stabilisation of symplectic inequalities and applications, Amer. Math. Soc. Translations, Series 2 196 63-72 (1999)
  • F. Lalonde, D. McDuff and L. Polterovich, On the Flux conjectures, CRM Proceedings and Lecture Notes, American Mathematical Society 15 69-86 (1998)
  • F. Lalonde and L. Polterovich, Symplectic diffeomorphisms as isometries of Hofer's norm, Topology 36 711-728 (1997)
  • F. Lalonde and D. McDuff, Positive paths in the linear symplectic group, The Arnold-Gelfand seminar, Birkhauser 1-20 (1997)
  • F. Lalonde, Energy and capacities in symplectic topology, in: , W.H. Kazez (ed.), Geometric Topology, Studies in Advanced Mathematics, American Mamthematical Society and International Press 2 328-374 (1997)
  • F. Lalonde, New trends in symplectic geometry, invited survey in the new series of C.R. Math. Rep. Acad. Sci. Canada 19 (2) 33-50 (1997)
  • F. Lalonde, J-curves and symplectic invariants, in:, J. Hurtubise and F. Lalonde (eds), Proceedings of the NATO Summer Advanced Institute (SMS) on Gauge Theory and Symplectic Geometry Université de Montréal 1995, Kluwer Academic Publishers, Dordrecht (1997)
  • F. Lalonde and D. McDuff, The classification of ruled symplectic 4-manifolds, Mathematical Research Letters 3 769-778 (1996)
  • F. Lalonde and D. McDuff, J-holomorphic curves and the classification of rational and ruled symplectic 4-manifolds, in:, C.B. Thomas (ed.), Symplectic and Contact Geometry, Proceedings of the Newton Institute Special Year on Symplectic Geometry, Cambridge University Press 1-40 (1996)
  • F. Lalonde and D. McDuff, Local Non-Squeezing Theorems and Stability, Geometric and Functional Analalysis 5 (Special volume in the honour of M. Gromov) 364 (1995)
  • F. Lalonde and D. McDuff, Hofer's $L^{\infty}$-geometry: energy and stability of Hamiltonian flows part I, Inventiones Mathematicae 122 1-34 (1995)
  • F. Lalonde and D. McDuff, Hofer's $L^{\infty}$-geometry: energy and stability of Hamiltonian flows part II, Inventiones Mathematicae 122 35-69 (1995)
  • F. Lalonde and D. McDuff, The geometry of symplectic energy, Annals of Mathematics 141 349-371 (1995)
  • F. Lalonde, Isotopy of symplectic balls, Gromov's radius, and the structure of irrational ruled symplectic 4-manifolds, Mathematische Annalen 300 273-296 (1994)
  • M. Audin, F. Lalonde and L. Polterovich, Symplectic rigidity: Lagrangian submanifolds, in: , M. Audin and J. Lafontaine (eds.), Holomorphic Curves in Symplectic Geometry, Progress in Mathematics 117 271-322 (1994)

Monographies et proceedings

  • M. Abreu, F. Lalonde, L.Polterovich (eds), New Perspectives and Challenges in Symplectic Field Theory, The CRM Proceedings and Lecture Notes 49, 342 (2009)
  • P. Biran, O. Cornea and F. Lalonde (eds), Morse theoretical methods in symplectic topology and non-linear analysis, Proceedings of the NATO Advanced Study Institute (Montréal, 2004), Kluwer Academic Publishers, Dordrecht (2005)
  • Y. Eliashberg, B. Khesin and F. Lalonde (eds), Symplectic and Contact Topology: Interactions and Perspectives, Proceedings of the workshop on ''Symplectic topology and higher dimensional Gauge invariants'' (held at the Fields Institute in March-April 2001), Fields Institute Communications 35, AMS (2003)
  • F. Lalonde (ed.), Proceedings of the CRM Workshop on Geometry, Topology and Dynamics (Montréal 1995), CRM Proceedings and Lecture Notes 15, AMS (1998)
  • J. Hurtubise and F. Lalonde (eds), Gauge Theory and Symplectic Geometry, Proceedings of the NATO Summer Advanced Institute on Gauge Theory and Symplectic Geometry (Montréal 1995), Kluwer Academic Publishers, Dordrecht (1997)

Postdoctorants

Étudiants dirigés