Version francaise

Pierre Germain

Courant Institute of Mathematical Sciences
New York University
251 Mercer Street
New York, N.Y. 10012-1185

TEACHING: In the Spring 2015 Semester, I am teaching PDE2. Below are lecture notes and Homework:
Notes 1. HW1.
Notes 2. HW2.
Notes 3. HW3.
Notes 4. HW4.

Research domains: fluid mechanics, nonlinear wave equations, harmonic analysis.

Here is my CV.

I defended in 2005 my PhD, which I had prepared under the supervision of Isabelle Gallagher; I defended in 2008 my "Habilitation a diriger des recherches".

Since January 2015, I am an Associate Professor at the Courant Institute.

I am an editor for DCDS-A

Current PhD students
James Fennell
Nicolas Laillet (jointly with Isabelle Gallagher)
Domingos Lopes
Klaus Widmayer


- Equations de Navier-Stokes en deux dimensions : existence et comportement asymptotique de solutions d'energie infinie, Bull. Sci. Math. 130 (2006), no. 2, 123--151.

- Multipliers, Paramultipliers, and weak-strong uniqueness for the Navier-Stokes equations, J. Differential Equations 226 (2006), no. 2, 373--428

- Regularity of solutions to the Navier-Stokes equations evolving from small data in BMO-1 , with Natasa Pavlovic and Gigliola Staffilani, Int. Math. Res. Not. IMRN 2007, no. 21.

- Finite energy scattering for the Lorentz-Maxwell equation, Ann. Henri Poincare 9 (2008), no. 5, 927--943.

- Global infinite energy solutions of the critical semilinear wave equation, Rev. Mat. Iberoam. 24 (2008), no. 2, 463--497.

- Strong solutions and weak-strong uniqueness for the nonhomogeneous Navier-Stokes equation, J. Anal. Math. 105 (2008), 169--196.

- Besov spaces and self-similar solutions for the wave-map equation., Comm. Partial Differential Equations 33 (2008), no. 7-9, 1571--1596.

- The second iterate for the Navier-Stokes equation, J. Funct. Anal. 255 (2008), no. 9, 2248--2264.

- On the existence of smooth self-similar blow up profiles for the wave map equation, Comm. Pure Appl. Math. 62 (2009), no. 5, 706--728.

- Global solutions for 3D quadratic Schroedinger equations, with Nader Masmoudi and Jalal Shatah, Int. Math. Res. Not. IMRN 2009, no. 3, 414--432.

- Self-similar solutions for the Schroedinger map equation, with Jalal Shatah and Chongchun Zeng, Math. Z. 264 (2010), no. 3, 697--707.

- Weak-strong uniqueness for the isentropic compressible Navier-Stokes system, J. Math. Fluid Mech. 13 (2011), no. 1, 137--146.

- Bilinear oscillatory integrals and boundedness for new bilinear multipliers, with Frederic Bernicot, Adv. Math. 225 (2010), no. 4, 1739--1785.

- Global solutions for the gravity water waves equation in dimension 3 (note announcing the result), with Nader Masmoudi and Jalal Shatah, C. R. Math. Acad. Sci. Paris 347 (2009), no. 15-16, 897--902.

- Global solutions for the gravity water waves equation in dimension 3 (full article), with Nader Masmoudi and Jalal Shatah, Ann. of Math. (2) 175 (2012), no. 2, 691--754.

- Global solutions for 2D quadratic Schroedinger equations, with Nader Masmoudi and Jalal Shatah, J. Math. Pures Appl. (9) 97 (2012), no. 5, 505--543.

- Global solutions for coupled Klein-Gordon equations with different speeds, Ann. Inst. Fourier (Grenoble) 61 (2011), no. 6, 2463--2506.

- Space-time resonances, Exp. No 8, Proceedings of the Journees EDP 2010.

- Self-similar expanders of the harmonic map flow, with Melanie Rupflin, Ann. Inst. H. Poincare Anal. Non Lineaire 28 (2011), no. 5, 743--773.

- Boundedness of bilinear multipliers whose symbols have a narrow support, with Frederic Bernicot, J. Anal. Math. 119 (2013), 166--212.

- Global existence for the Euler-Maxwell system, with Nader Masmoudi.

- On the open sea propagation of water waves generated by a moving bed, with Adrian Constantin, Philos. Trans. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci. 370 (2012), no. 1964, 1587--1601.

- Bilinear dispersive estimates via space time resonances. Part I: the one-dimensional case, with Frederic Bernicot, Anal. PDE 6 (2013), no. 3, 687-722.

- Non-neutral global solutions for the electron Euler-Poisson system in 3D, with Nader Masmoudi and Benoit Pausader, SIAM J. Math. Anal. 45 (2013), no. 1, 267--278.

- Well-posedness of the Navier-Stokes-Maxwell equations, with Slim Ibrahim and Nader Masmoudi, accepted by the Proceedings of the Royal Society of Edinburgh Section A.

- Global existence for capillary water-waves, with Nader Masmoudi and Jalal Shatah, accepted by Communications in Pure and Applied Mathematics.

- The finite energy method for compressible fluids. The Navier-Stokes-Korteweg model, with Philippe LeFloch.

- Instability of some equatorially trapped waves, with Adrian Constantin.

- Nonlinear resonances with a potential: multilinear estimates and an application to NLS, with Zaher Hani and Sam Walsh.

- The weakly nonlinear large box limit of the 2D cubic nonlinear Schrodinger equation, with Erwan Faou and Zaher Hani.

- Bilinear dispersive estimates via space-time resonances, part II: dimensions 2 and 3 , with Frederic Bernicot.

- An extension of the Derrida-Lebowitz-Speer-Spohn equation, with Charles Bordenave.

- On the continuous resonant equation for NLS: I. Deterministic analysis, with Laurent Thomann and Zaher Hani.

- On the continuous resonant equation for NLS: II. Statistical analysis, with Laurent Thomann and Zaher Hani.