Hadi Kharaghani

In celebration of Richard Guy’s 100th birthday, the Universities of Alberta, Calgary and Lethbridge have named September 30th, 2016, Richard Guy Day and will be hosting and showcasing a number of activities in Guy’s honour. Guy continues to be active...

It is conjectured that there is no projective plane of order 12. Balanced splittable Hadamard matrices were introduced in 2018. In 2023, it was shown that a projective plane of order 12 is equivalent to a balanced multi-splittable Hadamard matrix of...

What is the PIMS YRC? The PIMS Young Researchers Conference in Mathematics and Statistics (PIMS YRC) is an annual event that provides a unique forum for young mathematicians across Canada to present their research and to collaborate with their peers...

Twin prime powers are used in the construction of some very interesting combinatorial objects. In an old paper they are used in the construction of regular Hadamard matrices. In a recent work, they are used to show the existence of an infinite class...

A Hadamard matrix H of order 4n2 is said to be skew-regular if it is of skew-type and the absolute values of the row sums are all 2n. It is conjectured that for each odd integer n there is a skew-regular matrix of order 4n2. A Hadamard matrix H of...