Oscillatory integral operators with low-order degeneracies
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Sharp L^2 estimates for oscillatory integral operators and Fourier integral operators associated with canonical relations having two-sided cusp or one-sided swallowtail singularities are obtained.
Final version, with a few misprints corrected. To appear, Duke Math. Jour
Final version, with a few misprints corrected. To appear, Duke Math. Jour