Skip to Main Content


AMS eBook CollectionsOne of the world's most respected mathematical collections, available in digital format for your library or institution


Multiple Hilbert transforms associated with polynomials

About this Title

Joonil Kim, Department of Mathematics, Yonsei University, Seoul 121, Korea

Publication: Memoirs of the American Mathematical Society
Publication Year: 2015; Volume 237, Number 1119
ISBNs: 978-1-4704-1435-1 (print); 978-1-4704-2505-0 (online)
DOI: https://doi.org/10.1090/memo/1119
Published electronically: January 21, 2015
Keywords: Multiple Hilbert transform, Newton polyhedron, face, cone, oscillatory singular integral
MSC: Primary 42B20, 42B25

View full volume PDF

View other years and numbers:

Table of Contents

Chapters

  • 1. Introduction
  • 2. Definitions of Polyhedra, Their Faces and Cones
  • 3. Main Theorem and Background
  • 4. Combinatorial Lemmas
  • 5. Descending Faces vs. Ascending Cones
  • 6. Preliminary Results of Analysis
  • 7. Proof of Sufficiency
  • 8. Necessity Theorem
  • 9. Preliminary Lemmas for Necessity Proof
  • 10. Proof of Necessity
  • 11. Proofs of Corollary and Main Theorem
  • 12. Appendix

Abstract

Let $\Lambda =(\Lambda _1,\cdots ,\Lambda _d)$ with $\,\Lambda _\nu \subset \mathbb {Z}_+^n\,$, and set $\mathcal {P}_{\Lambda }$ the family of all vector polynomials, \[ \mathcal {P}_{\Lambda }=\left \{P_{\Lambda }: P_{\Lambda }(t)=\left (\sum _{\mathfrak {m}\,\in \Lambda _{1}}\,c_{\mathfrak {m}}^{1}\,t^{\mathfrak {m}},\cdots ,\sum _{\mathfrak {m}\,\in \Lambda _{d}}\,c_{\mathfrak {m}}^{d}\,t^{\mathfrak {m}}\right )\ \quad \text {with}\quad t\in \mathbb {R}^n\right \}.\] Given $P_\Lambda \in \mathcal {P}_{\Lambda }$, we consider a class of multi-parameter oscillatory singular integrals, \[ \mathcal {I}(P_\Lambda ,\xi ,r)=\text {p.v.}\int _{\prod [-r_j,r_j]}e^{i\langle \xi ,P_{\Lambda }(t)\rangle } \frac {dt_1}{t_1}\cdots \frac {dt_n}{t_n} \quad \text {where} \quad \xi \in \mathbb {R}^d, r\in \mathbb {R}_+^n.\] When $n=1$, the integral $\mathcal {I}(P_\Lambda ,\xi ,r)$ for any $P_\Lambda \in \mathcal {P}_\Lambda$ is bounded uniformly in $\xi$ and $r$. However, when $n\ge 2$, the uniform boundedness depends on each individual polynomial $P_\Lambda$. In this paper, we fix $\Lambda$ and find a necessary and sufficient condition on $\Lambda$ that \[ \text {for all} \quad P_\Lambda \in \mathcal {P}_\Lambda , \ \ \sup _{\xi , \, r} |\mathcal {I}(P_\Lambda ,\xi ,r)|\le C_{P_\Lambda }<\infty .\]

References [Enhancements On Off] (What's this?)

References