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math.AP2026

Positive solutions to semipositone problems on Heisenberg group

Vikram Naik, Rohit Kumar

This article focuses on establishing a positive weak solution to a class of semipositone problems over the Heisenberg group . In particular, we are interested in the…

math.AP2026

Characterizations of compactness and weighted eigenvalue problem associated with fractional Hardy-type inequalities

Ujjal Das, Rohit Kumar, Abhishek Sarkar

In this article, we consider the following fractional {Hardy-type} inequality: \begin{align} \label{Fractional Hardy_abst} \int_{\mathbb{R}^N} |w(x)||u(x)|^p \mathrm{d}x \leq C \in…

math.AP2025

Fractional critical systems with mixed boundary conditions

R. Kumar, A. Ortega

In this paper, we analyze the existence of solution for a fractional elliptic system coupled by critical nonlinearities and endowed with mixed Dirichlet-Neumann boundary conditions…

math.AP2025

Global branching for semilinear fractional Laplace with sublinear nonlinearity

Jefferson Abrantes, Rohit Kumar, Abhishek Sarkar

This article investigates the existence, nonexistence, and multiplicity of positive solutions to the sublinear fractional elliptic problem . We begin by establishing seve…

math.AP2025

On semipositone problems over for the fractional -Laplace operator

Nirjan Biswas, Rohit Kumar

For , and we find a positive solution to the following class of semipositone problems associated with the fractional -Laplace oper…

math.AP2024

Higher order fractional weighted homogeneous spaces: characterization and finer embeddings

Nirjan Biswas, Rohit Kumar

In this article, for and , we establish an isometric isomorphism between the higher order fractio…