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From the 1 of 12 linked papers with an AI index.

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20242026
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12 papers

math.AP2026

Regularity for the fractional logarithmic -Laplacian

Nirjan Biswas, Stuti Das, Abhrojyoti Sen

The paper establishes a Harnack inequality with tail terms and local Hölder continuity for the fractional logarithmic p‑Laplacian, a nonlocal operator obtained by differentiating t…

math.AP2026

Harnack inequality for mixed local-nonlocal weighted homogeneous equations

Nirjan Biswas, Stuti Das

We consider the following class of mixed local-nonlocal equations: \begin{equation}\tag{P}\label{eq:P} -Δ_p u + (-Δ)_p^s u = V |u|^{p-2}u \text{ in } Ω, \end{equation} where $s…

math.AP2026

Brezis-Nirenberg problems for mixed local-nonlocal operators with superlinear perturbations: compactness and applications

Mousomi Bhakta, Nirjan Biswas, Paramananda Das

In this paper, we consider the following mixed local nonlocal Brezis-Nirenberg problem \begin{equation}\label{crit_pro_abstract}\tag{} -Δu+(-Δ)^s u=λ|u|^{p-2}…

math.AP2026

Mixed local-nonlocal equations with critical nonlinearity on : Non-existence, Existence, and Multiplicity of positive solutions

Nirjan Biswas, Souptik Chakraborty, Paramananda Das

We consider the following quasilinear critical problem involving the mixed local-nonlocal operator: \begin{equation}\label{main_prob_abstract_1}\tag{} -Δ_p u+(-Δ_p…

math.AP2026

Quasilinear problems with mixed local-nonlocal operator and concave-critical nonlinearities: Multiplicity of positive solutions

Mousomi Bhakta, Nirjan Biswas, Paramananda Das

We study the existence and multiplicity of positive solutions for the following concave-critical problem driven by an operator of mixed order obtained by the sum of the classical $…

math.AP2026

Fractional -Laplace systems with critical Hardy nonlinearities: Existence and Multiplicity

Nirjan Biswas, Paramananda Das, Shilpa Gupta

Let be a bounded open set containing zero, and . In this paper, we first deal with the existence, non-existence and some p…