Renhui Wan

collaborators

2 papers

math.CA2026

Sharp variational estimates of Stein-Wainger type operators

Renhui Wan

For any integer $n \geq 2$ , we establish $L^{p} (R^{n})$ inequalities for the $r$ -variations of Stein-Wainger type oscillatory integral operators with general phase functions. These in…

math.CA2026

Almost sharp variational estimates for discrete truncated operators of Stein-Wainger type

Jiecheng Chen, Renhui Wan

We establish $r$ -variational estimates for discrete truncated Stein-Wainger type operators on $ℓ^{p}$ for $1 < p < \infty$ . Notably, these estimates are sharp and enhance the results…