Title: Uniform estimates for cubic oscillatory integrals

Authors: Philip T. Gressman

Issue: Volume 57 (2008), Issue 7, 3419-3442

Abstract: This paper establishes the optimal decay rate for scalar oscillatory integrals in $n$ variables which satisfy a nondegeneracy condition on the third derivatives. The estimates proved are stable under small linear perturbations, as encountered when computing the Fourier transform of surface-carried measures. The main idea of the proof is to construct a nonisotropic family of balls which locally capture the scales and directions in which cancellation occurs.