Lower bounds for parameter-dependent oscillatory integrals and Fourier frames on hypersurfaces

Shilei Fan, Bochen Liu

We prove lower bounds for Fourier transforms of surface measures $$|\widehat{ψ\,dσ}(ξ)| \gtrsim_{ψ, K, σ, R_0} σ(B(p, |ξ|^{-1})), \text{ given }p\in K\Subset\{ψ>0\} ,\ \vec{n}_{p}\…