Pierre Raphael
University of Nice Sophia Antipolis
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Mathematische Annalen | 2005
Pierre Raphael
Abstract.We consider finite time blow up solutions to the critical nonlinear Schrödinger equation with initial condition u0 ∈ H1. Existence of such solutions is known, but the complete blow up dynamic is not understood so far. For initial data with negative energy, finite time blow up with a universal sharp upper bound on the blow up rate corresponding to the so-called log-log law has been proved in [10], [11]. We focus in this paper onto the positive energy case where at least two blow up speeds are known to possibly occur. We establish the stability in energy space H1 of the log-log upper bound exhibited in the negative energy case, and a sharp lower bound on blow up rate in the other regime which corresponds to known explicit blow up solutions.
Journal of the American Mathematical Society | 2011
Pierre Raphael; Jeremie Szeftel
We consider the 2-dimensional focusing mass critical NLS with an inhomogeneous nonlinearity:
Journal of the European Mathematical Society | 2015
Yvan Martel; Frank Merle; Pierre Raphael
i\partial_tu+\Delta u+k(x)|u|^{2}u=0
Analysis & PDE | 2014
Pierre Raphael; Remi Schweyer
. From standard argument, there exists a threshold
Annales Henri Poincaré | 2009
Joachim Krieger; Enno Lenzmann; Pierre Raphael
M_k>0
Journal of the American Mathematical Society | 2007
Mohammed Lemou; Florian Méhats; Pierre Raphael
such that
Journal of Hyperbolic Differential Equations | 2005
Frank Merle; Pierre Raphael
H^1
Communications in Partial Differential Equations | 2009
Mohammed Lemou; Florian Méhats; Pierre Raphael
solutions with
Annales Henri Poincaré | 2009
Joachim Krieger; Enno Lenzmann; Pierre Raphael
\|u\|_{L^2} M_k
Siam Journal on Mathematical Analysis | 2008
Mohammed Lemou; Florian Méhats; Pierre Raphael
. In this paper, we consider the dynamics at threshold