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<top_article>
<mrnumber>MR2297944</mrnumber>
<author>Hoshiga, Akira</author>
<author_utf8>Akira HOSHIGA</author_utf8>
<title>The Existence of Global Solutions to Systems of Quasilinear Wave Equations with Quadratic Nonlinearities in 2-Dimensional Space</title>
<journal>Funkcialaj Ekvacioj. Serio Internacia</journal>
<volume>49</volume>
<year>2006</year>
<page>357--384</page>
<url_pdf>http://fe.math.kobe-u.ac.jp/FE/FullPapers/49-3/49_357.pdf</url_pdf>
<mathsci_link>http://www.ams.org/mathscinet-getitem?mr=MR2297944</mathsci_link>
<abstract>We deal with systems of quasilinear wave equations which contain quadratic nonlinearities in 2-dimensional space. We have already known that such the system has a smooth solution till the time $t_0=C\varepsilon^{-2}$ for sufficiently small $\varepsilon>0$, where $\varepsilon$ is the size of initial data. In this paper, we shall show that if quadratic and cubic nonlinearities satisfy so-called Null-condition, then the smooth solution exists globally in time. In the proof of the theorem, we use the Alinhac ghost weight energy.</abstract>
<keywords>Null-form, Multiple speeds, Global existence.</keywords>
<subject>35A05, 35B45, 35L15.</subject>
<fesi_info>
  <FILE>49-357</FILE>
  <YEAR>2006</YEAR>
  <TITLE>The Existence of Global Solutions to Systems of Quasilinear Wave Equations with Quadratic Nonlinearities in 2-Dimensional Space</TITLE>
  <AUTHOR>HOSHIGA, Akira</AUTHOR>
  <AUTHOR_utf8>Akira HOSHIGA</AUTHOR_utf8>
</fesi_info>

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