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On stability of type II blow up for the critical nonlinear wave equation on $\mathbb {R}^{3+1}$

About this Title

Joachim Krieger

Publication: Memoirs of the American Mathematical Society
Publication Year: 2020; Volume 267, Number 1301
ISBNs: 978-1-4704-4299-6 (print); 978-1-4704-6401-1 (online)
DOI: https://doi.org/10.1090/memo/1301
Published electronically: January 4, 2021
Keywords: Critical wave equation, blowup

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Table of Contents

Chapters

  • 1. Introduction
  • 2. Recall of the construction of $u_{\nu }$ and the distorted Fourier transform
  • 3. Growth properties of the forward linear parametrix
  • 4. Setting up the perturbative problem
  • 5. Nonlinear estimates
  • 6. Outline of the iterative scheme
  • 7. Control of the first iterate; contribution of the linear terms $\mathcal {R}(\tau , \underline {x}^{(0)})$
  • 8. Control of the first iterate; contribution of the nonlinear terms
  • 9. Iterative step; a priori control of higher iterates
  • 10. Preparations for the proof of convergence; refined estimates
  • 11. Improvements upon re-iteration
  • 12. Convergence of the iterative scheme
  • 13. Proof of the main technical theorem
  • 14. Appendix

Abstract

We show that the finite time type II blow up solutions for the energy critical nonlinear wave equation \[ \Box u = -u^{5} \] on $\mathbb {R}^{3+1}$ constructed in Krieger, Schlag, and Tataru (2009) and Krieger and Schlag (2014) are stable along a co-dimension three manifold of radial data perturbations in a suitable topology, provided the scaling parameter $\lambda (t) = t^{-1-\nu }$ is sufficiently close to the self-similar rate, i. e. $\nu >0$ is sufficiently small. Our method is based on Fourier techniques adapted to time dependent wave operators of the form \[ -∂_{t}^{2} + ∂_{r}^{2} + \frac2r∂_{r} +V(𝜆(t)r) \] for suitable monotone scaling parameters $\lambda (t)$ and potentials $V(r)$ with a resonance at zero.

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