🔢 mathematics

Analytical and Gegenbauer spectral solutions of damped wave equations with singular potentials in ℝn

This paper presents a comprehensive analytical and numerical study of multi-dimensional damped wave equations with singular potentials, establishing rigorous convergence and stability results for an eigenfunction expansion solution while developing a high-order Gegenbauer collocation method that achieves algebraic convergence rates consistent with the singularity-induced regularity loss.

Youssri Hassan Youssri, Zafar Duman Abbasov, Lamine Bouzettouta, Amal Alhujaylan, Khaled Zennir2026-06-25
🔢 mathematics

Cost-sensitive spectral sampling algorithms for randomized block Kaczmarz methods

This paper formulates the selection of an optimal static sampling distribution for randomized block Kaczmarz methods as a cost-sensitive E-optimal design problem solvable via semidefinite programming, and proposes two certified algorithms that significantly outperform standard uniform or norm-based sampling by accounting for both row-space redundancy and varying computational costs.

Shreyhaan Sarkar2026-06-24