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19972026
most citedGaussian heat kernel upper bounds via Phragmén-Lindelöf theorem

181 citations · 551 across the 67 of their papers we have counts for

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math.AP2026

Herz versus Fefferman: Symmetric and asymmetric Bochner--Riesz theory

Peng Chen, Dangyang He, Adam Sikora +1

We study Bochner--Riesz summability for a one-dimensional model of noncompact manifolds with ends. Each end has an effective Euclidean dimension, and these dimensions may differ fr…

math.AP2023

Vertical Maximal Functions on Manifolds with Ends

Himani Sharma, Adam Sikora

We consider the setting of manifolds with ends which are obtained by compact perturbation (gluing) of ends of the form . We investigate family…

math.AP2021

Vertical and horizontal Square Functions on a Class of Non-Doubling Manifolds

Julian Bailey, Adam Sikora

We consider a class of non-doubling manifolds that are the connected sum of a finite number of -dimensional manifolds of the form $\mathbb{R}^{n_{i}} \times \mathc…

math.AP2019

Lie group approach to Grushin operators

Jacek Dziubański, Adam Sikora

We consider a finite system of complete vector fields acting on smooth manifolds equipped with a smooth positive measure. We assume that the system…

math.AP2019

Sharp spectral multipliers without semigroup framework and application to random walks

Peng Chen, El Maati Ouhabaz, Adam Sikora +1

In this paper we prove spectral multiplier theorems for abstract self-adjoint operators on spaces of homogeneous type. We have two main objectives. The first one is to work outside…

math.AP2018

Riesz transforms on a class of non-doubling manifolds

Andrew Hassell, Adam Sikora

We consider a class of manifolds obtained by taking the connected sum of a finite number of -dimensional Riemannian manifolds of the form $(\mathbb{R}^{n_i}, δ) \t…