2017/02/04 by Jongchon Kim, Kim, Jongchon · 2 citations
Mathematics · #Advanced Harmonic Analysis Research #Advanced Mathematical Physics Problems #Classical Analysis and ODEs (math.CA) #FOS: Mathematics #Nonlinear Partial Differential Equations
paper · pdf · doi:10.48550/arxiv.1702.01231
openalex publication_date 2017/02/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We provide Lp → Lq refinements on some Fourier restriction estimates obtained using polynomial partitioning. Let S⊂ ℝ3 be a compact C^∞ surface with strictly positive second fundamental form. We derive sharp Lp(S) → Lq(ℝ3) estimates for the associated Fourier extension operator for q> 3.25 and q≥ 2p' from an estimate of Guth that was used to obtain L^∞(S) → Lq(ℝ3) bounds for q>3.25. We present a slightly weaker result when S is the hyperbolic paraboloid in ℝ3 based on the work of Cho and Lee. Finally, we give some refinements for the truncated paraboloid in higher dimensions.