LONG COURSES
Perelman's work and the
geometrization conjecture by L. Bessières, G. Besson, J. Lott,
and S. Maillot
- Schedule: May 2008, from monday to thursday, 10h-12h15.
- Program:
the aim of this course is to go as far as possible in the
description of Perelman's proof of the geometrization conjecture.
- Prerequisites:
the content of the basic courses given by Z. Djadli, S. Gallot and S. Maillot.
- References:
- G. Perelman: The entropy formula for the Ricci flow and
its geometric applications. arXiv link
- G. Perelman: Ricci flow with surgery on
three-manifolds. arXiv link
- G. Perelman: Finite extinction time for the solutions to
the Ricci flow on certain three-manifolds. arXiv link
- B. Kleiner and J. Lott: Notes on Perelman's papers. The
text can be downloaded from:
http://www.math.lsa.umich.edu/~lott/ricciflow/perelman.html
- J. Morgan and G. Tian: Ricci Flow and the
Poincaré conjecture, A.M.S. and Clay Mathematics
Institute, Clay Mathematics Monographs, vol. 3.
- L. Bessières, G. Besson, M. Boileau, S. Maillot
and J. Porti: Suites de métriques extraites du flot de Ricci
sur les variétés asphériques de
dimension 3 (English version to be posted soon). arXiv link
- Many more references may be found at: http://www.math.lsa.umich.edu/~lott/ricciflow/perelman.html
Optimal transport of
measures and Ricci curvature by D. Cordero-Erausquin
- Schedule: May 19th-31st, from monday to thursday, 16h-18h
- Program:
- Background: Brunn-Minkowksi (BM) and
Prékopa-Leindler inequalities, and optimal transport
in Euclidean space (the Brenier map).
- Optimal transport on Riemannian manifolds and its link
with Jacobi fields and Ricci curvature.
- First approach to (BM) type inequalities on Riemannian
manifolds : a general inequality.
- Second approach relying on lower bounds on the Ricci
curvature.
- Convex functionals on the Wasserstein space and Ricci
curvature.
- Prerequisites: the arithmetic-geometric inequality.
- Main reference:
- C. Villani: Topics in Optimal Transportation, AMS,
Graduate Studies in Mathematics vol. 58 (2003)
- Detailed bibliography:
Introduction to the Ricci flow by Z. Djadli
- Schedule: May 5th-17th, from monday to thursday, 13h30-15h45.
- Program:
the lectures will focus mainly on the analytical
aspects of the Ricci flow. The goal is to provide all the tools
used in the study of the Ricci flow. More specifically, the
program is:
- ''Variational'' aspect of the Ricci flow.
- Maximum principles.
- Short time existence for the Ricci flow.
- The Ricci flow on 3-dimensional manifolds of positive
curvature.
- The Ricci flow on 4-dimensional manifolds of positive
curvature.
- The Ricci flow under pinching.
- If time allows, we will also adress the higher
dimensional case (mainly some recent results of Böhm-Wilking
and Brendle-Schoen)
- Prerequisites: the lectures given by S. Gallot
- References: B. Chow and D. Knopf, The Ricci flow: an introduction.
Mathematical Surveys and Monographs vol. 110, AMS.
Introduction to Ricci curvature by S. Gallot
- Schedule: April 14th-26th, from monday to thursday, 10h-12h15.
- Program:
- Riemannian metrics and geodesics (a quick review).
- Different curvatures and their geometric and
analytic interpretations (a quick review). Examples.
- Comparison theorems (Hadamard-Cartan, Rauch,
Bishop-Gromov and Toponogov). Some links between curvature and topology.
- Mostow's rigidity theorem.
- Different definitions of Einstein manifolds.
- Problems of existence, uniqueness or rigidity of Einstein manifolds.
- Some Riemannian compactness theorems. Applications to Einstein metrics.
- Prerequisites:
- Basic Topology and Differential Calculus.
- Manifolds, submanifolds, tangent bundle. Differential of
a map between manifolds. Differential forms.
- Flow of a vectorfield, geodesics.
- Connections, curvature tensor and how to compute it
in classical cases (a quick review will be done).
- Main References:
- S. Gallot, D. Hulin and J. Lafontaine: Riemannian
Geometry, Universitext, Springer (Third edition 2004).
- A. Besse: Einstein Manifolds, Ergebnisse der Math.,
Springer, Berlin-Heidelberg, 1987.
- Detailed bibliography for the prerequisites:
- V.I. Arnold: Méthodes mathématiques de la
mécanique classique, Moscow, Ed. Mir 1974.
- M. Berger and B. Gostiaux: Géométrie
différentielle, variétés,
courbes et surfaces PUF, 1987.
English translation : Differential Geometry : Manifolds,
Curves and Surfaces, GTM 115, Springer.
- Detailed bibliography for the lectures:
- T. Sakai: Riemannian Geometry,
American Math. Soc., Providence, Rhode Island (1996).
- J. Milnor: Morse theory, Princeton University Press
(1963), pp. 43--123.
- M. Do Carmo: Riemannian Geometry, Birkhaüser, Basel 1992.
- F. Warner: Foundations of differentiable manifolds and
Lie groups, Scott et Foresman, Greenville, Ill, 1971.
- J. Cheeger and D. Ebin: Comparison theorems in
Riemannian geometry, North Holland, 1975.
Topology and geometry of 3-manifolds by S. Maillot
- Schedule: April 14th-26th, from monday to thursday, 13h30-15h45.
- Program:
- Topology of 3-manifolds and the geometrization program
- Prime decomposition of 3-manifolds
- Seifert manifolds; graph manifolds
- Torus splitting; statement(s) of the geometrization conjecture
- The Loop and Sphere Theorems and their consequences
- Introduction to hyperbolic geometry
- Hyperbolic space; classification of isometries
- Margulis Lemma
- Mostow rigidity
- Finite volume hyperbolic 3-manifolds
- Prerequisites:
- Basic algebraic topology: fundamental
group, homology groups.
- Basic Riemannian geometry: Riemannian
metric, sectional curvature, geodesics
- Main references for part 1:
- P. Scott: The geometries of 3-manifolds. Bull. London
Math. Soc. 15 (1983), no. 5, 401--487.
- M. Boileau, S. Maillot and J. Porti:
Three-dimensional orbifolds and their geometric structures.
Panoramas et Syntheses 15. SMF, Paris, 2003. Chapters 1--3.
- Main reference for part 2:
- R. Benedetti and C. Petronio: Lectures on hyperbolic
geometry. Universitext. Springer-Verlag, Berlin, 1992.
- Detailed bibliography:
- J. Hempel: 3-manifolds.
Reprint of the 1976 original. AMS Chelsea Publishing, Providence, RI,
2004. xii+195 pp. ISBN: 0-8218-3695-1
- W. Jaco: Lectures on three-manifold topology.
CBMS Regional Conference Series in Mathematics, 43. American Mathematical
Society, Providence, R.I., 1980. xii+251 pp. ISBN: 0-8218-1693-4
- W.P. Thurston: Three-dimensional geometry and topology. Vol. 1.
Edited by Silvio Levy. Princeton Mathematical Series, 35. Princeton
University Press, Princeton, NJ, 1997. x+311 pp. ISBN: 0-691-08304-5
- M. Boileau, S. Maillot and J. Porti: Three-dimensional orbifolds and their geometric structures.
Panoramas et Syntheses 15. SMF, Paris, 2003. The
other chapters.
- J.G. Ratcliffe: Foundations of hyperbolic manifolds: Second
edition. Graduate Texts in Mathematics,
149. Springer, New York, 2006. xii+779 pp
- M. Kapovich: Hyperbolic manifolds and discrete
groups. Progress in Mathematics, 183. Birkhauser Boston, Inc., Boston, MA, 2001
- A. Hatcher: Notes on Basic 3-Manifold
Topology. Freely downloadable from http://www.math.cornell.edu/~hatcher/3M/3Mdownloads.html
- S. Matveev: Algorithmic Topology and
Classification of 3-manifolds Springer. Algorithms and computation in Mathematics, volume 9.
Introduction to Kähler-Einstein geometry and
Kähler-Ricci flow by N. Pali
- Schedule: May 19th-31st, from monday to thursday, 13h30-15h30.
- Program:
- Some backgrounds: curvature notions for the tangent
bundle (connection between the hermition case and the Kähler
case).
- Proof of the Aubin-Calabi-Yau theorem.
- Uniquenness of the Kähler-Einstein metrics over
Einstein-Fano manifolds.
- Functionals of the Kähler-Einstein geometry.
- Tian's properness of the K-energy.
- Basic facts about the Kähler-Ricci flow.
- Prerequisites: chapters I and V of Jean-Pierre
Demailly's book, Complex analytic and algebraic geometry,
available at:
http://www-fourier.ujf-grenoble.fr/~demailly
- References:
- Th. Aubin: Nonlinear Analysis on
Manifolds. Monge-Ampère Equations, Springer-Verlag,
Berlin, New-York, 1982.
- Chapter V in J.-P. Demailly's book: Complex
analytic and algebraic geometry (see above).
- G. Tian: Canonical metrics in Kähler
Geometry, Birkhäuser, 2000.
- S. Bando and T. Mabuchi: Uniqueness of Einstein Kähler
metrics modulo connected group actions, Adv. Stud. in Pure
Math. 10, 1987, 11-40.