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We prove a weak-type estimate for a class of operators extending some of the almost orthogonality issues involved in the study of the bilinear Hilbert transform by Lacey and Thiele.

Classical Analysis and ODEs · Mathematics 2007-05-23 Jose Barrionuevo , Michael T. Lacey

Lacey and Thiele have recently obtained a new proof of Carleson's theorem on almost everywhere convergence of Fourier series. This paper is a generalization of their techniques (known broadly as time-frequency analysis) to higher…

Classical Analysis and ODEs · Mathematics 2007-05-23 Malabika Pramanik , Erin Terwilleger

Results analogous to those proved by Rubio de Francia are obtained for a class of maximal functions formed by dilations of bilinear multiplier operators of limited decay. We focus our attention to $L^2\times L^2\to L^1$ estimates. We…

Classical Analysis and ODEs · Mathematics 2018-04-27 Loukas Grafakos , Danqing He , Petr Honzík

In this paper, we study the boundedness properties of the (dyadic) maximal bilinear operator associated with rough homogeneous kernels on $\mathbb{R}$. We establish sharp $L^{p_1}(\mathbb{R}) \times L^{p_2}(\mathbb{R}) \to…

Classical Analysis and ODEs · Mathematics 2025-10-23 Stefanos Lappas , Bae Jun Park

We consider some bilinear Fourier multiplier operators and give a bilinear version of Seeger, Sogge, and Stein's result for Fourier integral operators. Our results improve, for the case of Fourier multiplier operators, Rodr\'iguez-L\'opez,…

Classical Analysis and ODEs · Mathematics 2023-05-30 Tomoya Kato , Akihiko Miyachi , Naohito Tomita

Bilinear restriction estimates have been appeared in work of Bourgain, Klainerman, and Machedon. In this paper we develop the theory of these estimates (together with the analogues for Kakeya estimates). As a consequence we improve the…

Classical Analysis and ODEs · Mathematics 2007-05-23 Terence Tao , Ana Vargas , Luis Vega

We prove pointwise variational Lp bounds for a bilinear Fourier integral operator in a large but not necessarily sharp range of exponents. This result is a joint strengthening of the corresponding bounds for the classical Carleson operator,…

Classical Analysis and ODEs · Mathematics 2016-05-03 Yen Do , Camil Muscalu , Christoph Thiele

The purpose of this article is to provide an alternative proof of the weak-type $\left(1,\ldots,1;\frac{1}{m}\right)$ estimate for $m$-multilinear Calder\'on-Zygmund operators on $\mathbb{R}^n$ first proved by Grafakos and Torres.…

Classical Analysis and ODEs · Mathematics 2019-10-23 Cody B. Stockdale , Brett D. Wick

We improve an $L^2\times L^2\to L^2$ estimate for a certain bilinear operator in the finite field of size $p$, where $p$ is a prime sufficiently large. Our method carefully picks the variables to apply the Cauchy-Schwarz inequality. As a…

Classical Analysis and ODEs · Mathematics 2024-01-17 Necef Kavrut , Shukun Wu

In this paper we introduce and study a bilinear spherical maximal function of product type in the spirit of bilinear Calder\'{o}n-Zygmund theory. This operator is different from the bilinear spherical maximal function considered by Geba et…

Classical Analysis and ODEs · Mathematics 2020-02-20 L. Roncal , S. Shrivastava , K. Shuin

We prove a bilinear $L^2(\R^d) \times L^2(\R^d) \to L^2(\R^{d+1})$ estimate for a pair of oscillatory integral operators with different asymptotic parameters and phase functions satisfying a transversality condition. This is then used to…

Analysis of PDEs · Mathematics 2011-11-17 Zaher Hani

We prove quantitative, one-weight, weak-type estimates for maximal operators, singular integrals, fractional maximal operators and fractional integral operators. We consider a kind of weak-type inequality that was first studied by…

Classical Analysis and ODEs · Mathematics 2023-11-03 David Cruz-Uribe , Brandon Sweeting

We develop a notion of finite order lacunarity for direction sets in $\mathbb R^{d+1}$. Given a direction set $\Omega$ that is sublacunary according to this definition, we construct random examples of Euclidean sets that contain unit line…

Classical Analysis and ODEs · Mathematics 2014-05-05 Edward Kroc , Malabika Pramanik

We prove optimal bounds in L^2(R^2) for the maximal oper- ator obtained by taking a singular integral along N arbitrary directions in the plane. We also give a new proof for the optimal L^2 bound for the single scale Kakeya maximal…

Classical Analysis and ODEs · Mathematics 2010-01-13 Ciprian Demeter

Lebesgue space bounds $L^{p_1}({\mathbb R}^1) \times L^{p_2}(^1) \to L^q({\mathbb R}^1)$ are established for certain maximal bilinear operators. The proof combines a trilinear smoothing inequality with Calder\'on-Zygmund theory. A reference…

Classical Analysis and ODEs · Mathematics 2022-04-08 Michael Christ , Zirui Zhou

We extend Stein's maximal theorem to the bilinear setting. Let $M$ be a homogeneous space with a transitive action of a compact abelian group, and let $1 \le p,q \le 2$ and $1/2 \le r \le 1$ satisfy $1/p + 1/q = 1/r$. For a family of…

Classical Analysis and ODEs · Mathematics 2026-02-19 Xinyu Gao , Loukas Grafakos

We derive sparse bounds for the bilinear spherical maximal function in any dimension $d\geq 1$. When $d\geq 2$, this immediately recovers the sharp $L^p\times L^q\to L^r$ bound of the operator and implies quantitative weighted norm…

Classical Analysis and ODEs · Mathematics 2022-12-16 Tainara Borges , Benjamin Foster , Yumeng Ou , Jill Pipher , Zirui Zhou

This is a survey article about $L^2$ estimates for the $\bar \partial$ operator. After a review of the basic approach that has come to be called the "Bochner-Kodaira Technique", the focus is on twisted techniques and their applications to…

Complex Variables · Mathematics 2015-03-02 Jeffery D. McNeal , Dror Varolin

We establish some weighted $L^2$ inequalities for Fourier extension operators in the setting of orthonormal systems. In the process we develop a direct approach to such inequalities based on generalised Wigner distributions, complementing…

Classical Analysis and ODEs · Mathematics 2025-06-12 Jonathan Bennett , Neal Bez , Susana Gutierrez , Shohei Nakamura , Itamar Oliveira

The purpose of this paper is to prove an essentially sharp L^2 Fourier restriction estimate for light cones, of the type which is called bilinear in the recent literature.

Classical Analysis and ODEs · Mathematics 2007-05-23 Thomas Wolff
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