Geometric renormalization of large energy wave maps
Terence Tao[1]
- [1] Department of Mathematics, UCLA, Los Angeles CA 90095-1555
Journées Équations aux dérivées partielles (2004)
- page 1-32
- ISSN: 0752-0360
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topTao, Terence. "Geometric renormalization of large energy wave maps." Journées Équations aux dérivées partielles (2004): 1-32. <http://eudml.org/doc/10590>.
@article{Tao2004,
abstract = {There has been much progress in recent years in understanding the existence problem for wave maps with small critical Sobolev norm (in particular for two-dimensional wave maps with small energy); a key aspect in that theory has been a renormalization procedure (either a geometric Coulomb gauge, or a microlocal gauge) which converts the nonlinear term into one closer to that of a semilinear wave equation. However, both of these renormalization procedures encounter difficulty if the energy of the solution is large. In this report we present a different renormalization, based on the harmonic map heat flow, which works for large energy wave maps from two dimensions to hyperbolic spaces. We also observe an intriguing estimate of “non-concentration” type, which asserts roughly speaking that if the energy of a wave map concentrates at a point, then it becomes asymptotically self-similar.},
affiliation = {Department of Mathematics, UCLA, Los Angeles CA 90095-1555},
author = {Tao, Terence},
journal = {Journées Équations aux dérivées partielles},
keywords = {wave maps; harmonic maps; renormalization; Coulomb gauge; Minkowski space},
language = {eng},
month = {6},
pages = {1-32},
publisher = {Groupement de recherche 2434 du CNRS},
title = {Geometric renormalization of large energy wave maps},
url = {http://eudml.org/doc/10590},
year = {2004},
}
TY - JOUR
AU - Tao, Terence
TI - Geometric renormalization of large energy wave maps
JO - Journées Équations aux dérivées partielles
DA - 2004/6//
PB - Groupement de recherche 2434 du CNRS
SP - 1
EP - 32
AB - There has been much progress in recent years in understanding the existence problem for wave maps with small critical Sobolev norm (in particular for two-dimensional wave maps with small energy); a key aspect in that theory has been a renormalization procedure (either a geometric Coulomb gauge, or a microlocal gauge) which converts the nonlinear term into one closer to that of a semilinear wave equation. However, both of these renormalization procedures encounter difficulty if the energy of the solution is large. In this report we present a different renormalization, based on the harmonic map heat flow, which works for large energy wave maps from two dimensions to hyperbolic spaces. We also observe an intriguing estimate of “non-concentration” type, which asserts roughly speaking that if the energy of a wave map concentrates at a point, then it becomes asymptotically self-similar.
LA - eng
KW - wave maps; harmonic maps; renormalization; Coulomb gauge; Minkowski space
UR - http://eudml.org/doc/10590
ER -
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