Joydwip Singh

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math.AP2026

On Spectral multiplier theorem for sub-Laplacians with drift on MÃ©tivier groups

Nishta Garg, Joydwip Singh

In this paper, we prove a spectral multiplier theorem for sub-Laplacians with drift on MÃ©tivier groups. We improve the result of [Martini, Ottazzi and Vallarino, Rev. Mat. Iberoam…

math.AP2026

Stein's square function associated with the Bochner-Riesz means on MÃ©tivier groups and its applications

Joydwip Singh

In this paper, we study the $L^{p}$ -boundedness of Stein's square function $S^{I^} \pm (L)$ associated with the sub-Laplacian $L$ on MÃ©tivier group $G$ . A ke…

math.AP2026

Bilinear Bochner-Riesz Means on MÃ©tivier groups

Sayan Bagchi, Md Nurul Molla, Joydwip Singh

In this paper, we study the $L^{p_{1}} (G) \times L^{p_{2}} (G)$ to $L^{p} (G)$ boundedness of the bilinear Bochner-Riesz means associated with the sub-Laplacian on MÃ©tivier group $G$ un…

math.AP2025

On Schrödinger Pseudo-Multipliers and their Commutators

Sayan Bagchi, Riju Basak, Joydwip Singh +1

In this article, we establish the unweighted and weighted $L^{p}$ -boundedness of pseudo-multipliers associated with a class of Schrödinger operators, this generalizes the result of o…

math.AP2025

Bilinear Bochner-Riesz Means for Grushin Operators

Sayan Bagchi, Md Nurul Molla, Joydwip Singh

This paper is devoted to the study of $L^{p_{1}} \times L^{p_{2}}$ to $L^{p}$ boundedness of the bilinear Bochner-Riesz mean $B^{I^} \pm$ associated with the Grushin operator $\mat…

math.AP2025

Bochner-Riesz commutators for Grushin Operators

Md Nurul Molla, Joydwip Singh

In this paper, we study the boundedness of Bochner-Riesz commutator $[b, S^{I^} \pm (L)] (f) = b S^{I^} \pm (L) (f) - S^{I^} \pm (L) (b f)$ of a $BMO^{\varrho}(\mathbb{R}^d)…