Logarithmic Sobolev-type inequalities on Lie groups

M Chatzakou, A Kassymov, M Ruzhansky - The Journal of Geometric …, 2024 - Springer
In this paper we show a number of logarithmic inequalities on several classes of Lie groups:
log-Sobolev inequalities on general Lie groups, log-Sobolev (weighted and unweighted) …

Spectral summability for the quartic oscillator with applications to the Engel group.

H Bahouri, D Barilari, I Gallagher… - Journal of Spectral …, 2023 - content.ems.press
In this article, we investigate spectral properties of the sublaplacian G on the Engel group,
which is the main example of a Carnot group of step 3. We develop a new approach to the …

Besov and Triebel–Lizorkin spaces on Lie groups

T Bruno, MM Peloso, M Vallarino - Mathematische Annalen, 2020 - Springer
In this paper we develop a theory of Besov and Triebel–Lizorkin spaces on general
noncompact connected Lie groups endowed with a sub-Riemannian structure. Such spaces …

Functional inequalities on symmetric spaces of noncompact type and applications

A Kassymov, V Kumar, M Ruzhansky - The Journal of Geometric Analysis, 2024 - Springer
The aim of this paper is to begin a systematic study of functional inequalities on symmetric
spaces of noncompact type of higher rank. Our first main goal of this study is to establish the …

Fractional Leibniz rules associated to bilinear Hermite pseudo-multipliers

FK Ly, V Naibo - International Mathematics Research Notices, 2023 - academic.oup.com
We obtain a fractional Leibniz rule associated to bilinear Hermite pseudo-multipliers in the
context of Hermite Besov and Hermite Triebel–Lizorkin spaces. As a byproduct, we show …

Fractional Laplacian, homogeneous Sobolev spaces and their realizations

A Monguzzi, MM Peloso, M Salvatori - Annali di Matematica Pura ed …, 2020 - Springer
We study the fractional Laplacian and the homogeneous Sobolev spaces on R^ d R d, by
considering two definitions that are both considered classical. We compare these different …

The Sobolev embedding constant on Lie groups

T Bruno, MM Peloso, M Vallarino - Nonlinear Analysis, 2022 - Elsevier
In this paper we estimate the Sobolev embedding constant on general noncompact Lie
groups, for sub-Riemannian inhomogeneous Sobolev spaces endowed with a left invariant …

Hardy, Hardy-Sobolev, Hardy-Littlewood-Sobolev and Caffarelli-Kohn-Nirenberg inequalities on general Lie groups

M Ruzhansky, N Yessirkegenov - arxiv preprint arxiv:1810.08845, 2018 - arxiv.org
In this paper we obtain two-weight Hardy inequalities on general metric measure spaces
possessing polar decompositions. Moreover, we also find necessary and sufficient …

Local and non‐local Poincaré inequalities on Lie groups

T Bruno, MM Peloso, M Vallarino - Bulletin of the London …, 2022 - Wiley Online Library
We prove a local L p L^p‐Poincaré inequality, 1⩽ p<∞ 1\leqslantp<∞, on non‐compact Lie
groups endowed with a sub‐Riemannian structure. We show that the constant involved …

Anisotropic Shannon inequality

M Chatzakou, A Kassymov… - Osaka Journal of …, 2024 - projecteuclid.org
In this note we prove the anisotropic version of the Shannon inequality. This can be
conveniently realised in the setting of Folland and Stein's homogeneous groups. We give …