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math.AP2026

On a fractional nonlinear Schrödinger equation with irregular coefficients. case: d<2s

Arshyn Altyby, Michael Ruzhansky, Mohammed Elamine Sebih +1

In the case when , where is the space dimension and is the fractional power of the Laplacian, we study the well-posedness for a cubic nonlinear Schrödinger equation…

math.AP2025

Functional calculus for Safarov pseudo-differential operators

Santiago Gómez Cobos, Michael Ruzhansky

Given a smooth, closed Riemannian manifold equipped with a linear connection (not necessarily metric), we develop the holomorphic functional calculus for operators…

math.AP2024

Parabolic equations with concave non-linearity

Zhirayr Avetisyan, Khachatur Khachatryan, Michael Ruzhansky

In this paper we prove the existence and uniqueness of positive mild solutions for the semilinear parabolic equations of the form , where is a p…

math.AP2024

Fractional Hardy type inequalities on homogeneous Lie groups in the case

Aidyn Kassymov, Michael Ruzhansky, Durvudkhan Suragan

In this paper, we obtain a fractional Hardy inequality in the case on homogeneous Lie groups, and as an application we show the corresponding uncertainty principle. Also, we…

math.AP2024

Integro-differential diffusion equations on graded Lie groups

Joel E. Restrepo, Michael Ruzhansky, Berikbol T. Torebek

We first study the existence, uniqueness and well-posedness of a general class of integro-differential diffusion equation on , is a gra…