11 papers
Chollet's permanent conjecture for matrices
Kijti Rodtes
In the year 1982, John Chollet conjectured that, for any pair of positive semidefinite matrices , , where is the H…
Matrices over commutative rings as sum of higher powers
Kunlathida Muangma, Kijti Rodtes
On the Waring's problems for matrices over a commutative ring, there are some trace conditions provided for matrices eligibly expressed as a sum of -th powers with $k=2,3,4,5,6,…
Determinants preserving maps on the spaces of symmetric matrices and skew-symmetric matrices
Ratsiri Sanguanwong, Kijti Rodtes
Denote and the set of all symmetric and skew-symmetric matrices over a field , respectively, where and $\lvert \mathbb…
Structured Singular values on some generalized stochastic matrices
Kijti Rodtes, Mutti Ur Rehman Abbasi
In this paper, the exact values of the structured singular values of some generalized stochastic complex matrices is explicit in term of the constant row (column) sum.
Divisibility of LCM matrices by Totally nonnegative GCD matrices
Peeraphat Gatephan, Kijti Rodtes
In this paper, we show that all totally nonnegative GCD matrices are always divisors of the corresponding LCM matrices in the ring . We also introduce \…
A class of normal dilation matrices affirming the Marcus-de Oliveira conjecture
Kijti Rodtes
In this article, we prove a class of normal dilation matrices affirming the Marcus-de Oliveira conjecture.