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math.AP2026

Sharp Quantitative Forms of the Hardy Inequality on Cartan-Hadamard Manifolds via Sobolev-Lorentz Embeddings

Avas Banerjee, Debdip Ganguly, Prasun Roychowdhury

In this article, we investigate the quantitative form of the classical Hardy inequality. In our first result, we prove the following quantitative bound under the assumption that th…

math.AP2025

Critical, stability and higher-order analysis for Hardy type inequalities on Cartan-Hadamard manifolds

Prasun Roychowdhury, Durvudkhan Suragan, Nurgissa Yessirkegenov

In this paper, we focus on three main objectives related to Hardy-type inequalities on Cartan-Hadamard manifolds. Firstly, we explore critical Hardy-type inequalities that contain…

math.AP2025

Extremizer Stability of Higher-order Hardy-Rellich inequalities for Baouendi--Grushin vector fields

Avas Banerjee, Riju Basak, Prasun Roychowdhury

In this paper, we improve the -Rellich and Hardy-Rellich inequalities in the setting of radial Baouendi-Grushin vector fields. We establish an identity relating the subcritica…

math.AP2025

Hardy and Rellich identities and inequalities for Baouendi-Grushin operators via spherical vector fields

Debdip Ganguly, K. Jotsaroop, Prasun Roychowdhury

For Baouendi-Grushin vector fields, we prove Hardy, Hardy-Rellich, and Rellich identities and inequalities with sharp constants. Our explicit remainder terms significantly improve…

math.AP2024

On sharp constants in higher order Adams-Cianchi inequalities

Prasun Roychowdhury, Daniel Spector

The main results of this paper are the establishment of sharp constants for several families of critical Sobolev embeddings. These inequalities were pioneered by David R. Adams, wh…