Homogeneous Polynomial Carleson Operators Along the Paraboloid

Abstract

In this paper, we prove boundedness on $L^p(\mathbb{R}^{n+1})$, $1<p<\infty$, of polynomial Carleson operators along the paraboloid with phase belonging to a class $Y$ of homogeneous polynomials. For $n,d\ge 2$, let $\mathcal{P}^{n,d}$ denote the class of all real-valued homogeneous polynomials in $n$ variables of degree $d$. We may take the class $Y$ to be an arbitrary linear subspace $Y \subseteq \mathcal{P}^{n,d}$ such that $\dim Y \le M_{n , d}$, where $M_{n , d}$ is a constant depending only on $n$ and $d$. The main novelty of our result is that we may allow a large collection of homogeneous polynomials of the same degree, in contrast to earlier results that relied on distinct degree assumptions. The heart of our proof is a $TT^*$ method, and the derivation of new estimates for oscillatory integral kernels involving interactions between homogeneous polynomial phases and the paraboloid.