New bilinear estimates for quadratic-derivative nonlinear wave equations in 2+1 dimensions
New bilinear estimates for quadratic-derivative nonlinear wave equations in 2+1 dimensions
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2 1 维二次导数非线性波动方程的新双线性估计
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发表时间:
2012
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通讯作者:
Allison Tanguay
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作者:
Allison Tanguay
NEW BILINEAR ESTIMATES FOR QUADRATIC-DERIVATIVE NONLINEAR WAVE EQUATIONS IN 2+1 DIMENSIONS SEPTEMBER 2012 ALLISON TANGUAY, B.A., CENTRAL CONNECTICUT STATE UNIVERSITY M.S., UNIVERSITY OF MASSACHUSETTS AMHERST Ph.D., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Professor Andrea Nahmod This thesis is concerned with the Cauchy problem for the quadratic derivative nonlinear wave equation in two spatial dimensions. Using standard techniques, we reduce local well-posedness in Fourier Lebesgue spaces to bilinear estimates in associated wave Fourier Lebesgue spaces, for which we prove new product estimates. These estimates then allow us to establish local well-posedness in a parameter range that gives improvement over previously known results on the Sobolev scale.