activity
20052026
most citedA complete study of the lack of compactness and existence results of a Fractional Nirenberg Equation via a flatness hypothesis: Part I

24 citations · 134 across the 80 of their papers we have counts for

collaborators

83 papers

math.AP2026

A new class of nonlocal operators: the fractional logarithmic -Laplacian and its properties

Anouar Bahrouni, Abdelhamid Gouasmia, Hichem Hajaiej +1

In this paper, we introduce and investigate the fractional logarithmic -Laplacian , defined as the first-order derivative with respect to the parameter of…

math.AP2026

The best constant in the G-N inequality for the mixed local and Nonlocal Laplacian

Hichem Hajaiej, Yu Su

In this paper, we establish the best constant in the G-N inequality for the mixed local and nonlocal Laplacian. In our problem, classical methods cannot apply directly since regula…

math.AP2026

Local Existence, Uniqueness, Regularity, and Global Behavior of Evolution Equations Involving Mixed Local and Nonlocal Operators

Abdelhamid Gouasmia, Hichem Hajaiej, Kaushik Bal

In this work, we address a parabolic problem featuring a potentially doubly nonlinear term, governed by a combination of local and nonlocal operators (see Problem P1 below). We fir…

math.DG2026

The role of the mean curvature in nonlinear p-Laplacian problems with critical exponent

Hichem Chtioui, Hichem Hajaiej, Lovelesh Sharma

We deal with critical nonlinear problems involving the p-Laplacian operator on bounded domains with mixed boundary conditions. We prove the existence of least energy solutions. Our…

math.AP2026

Existence of positive and sign-changing solutions for a Choquard equation involving mixed local and nonlocal operators

Shaoxiong Chen, Hichem Hajaiej, Min Yang +1

We study the Choquard equation involving mixed local and nonlocal operators \[ -Δu + (-Δ)^{s}u + V(x)u = \left(\frac{1}{|x|^μ} * F(u)\right) f(u) \quad \text{in } \mathbb{R}^{2}, \…

math.AP2026

Lower and Upper Bounds for Sums of Eigenvalues of the Fractional-Logarithmic Laplacian

Maha Daoud, Hichem Hajaiej

In this work, we establish lower and upper bounds for sums of the Dirichlet eigenvalues of the fractional-logarithmic Laplacian. A main challenge in such a study comes from the fac…