Mathematics – Classical Analysis and ODEs
Scientific paper
2006-05-03
Mathematics
Classical Analysis and ODEs
39 pages, 2 figures; minor corrections; to appear in Journal of Functional Analysis
Scientific paper
We obtain $L^2$ decay estimates in $\lambda$ for oscillatory integral operators whose phase functions are homogeneous polynomials of degree m and satisfy various genericity assumptions. The decay rates obtained are optimal in the case of (2+2)--dimensions for any m while, in higher dimensions, the result is sharp for m sufficiently large. The proof for large $m$ follows from essentially algebraic considerations. For cubics in (2+2)--dimensions, the proof involves decomposing the operator near the conic zero variety of the determinant of the Hessian of the phase function, using an elaboration of the general approach of Phong and Stein [1994].
Greenleaf Allan
Pramanik Malabika
Tang Wan
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