Hadi Kharaghani

collaborators

3 papers

math.CO2026

A search for Hadamard matrices of Williamson type

Hadi Kharaghani, Ali Mohammadian, Behruz Tayfeh-Rezaie

In this article, we consider a special class of Williamson type matrices which we call them near Williamson matrices. They are in fact four $n \times n$ $(- 1, 1)$ -matrices $A, B, C,…

math.CO2026

A class of skew-regular quaternary Hadamard matrices

Hadi Kharaghani, Vlad Zaitsev

This paper introduces and investigates a novel class of skew-regular Quaternary Hadamard matrices. For every odd prime power $p$ , we establish the existence of these matrices for a…

math.CO2025

A generalisation of bent vectors for Butson Hadamard matrices

An $n \times n$ complex matrix $M$ with entries in the $k^{th}$ roots of unity which satisfies $M M^{*} = n I_{n}$ is called a Butson Hadamard matrix. While a matrix with…