12 citations · 19 across the 8 of their papers we have counts for
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math.CO2014
A lattice-theoretic approach to the Bourque-Ligh conjecture
Ismo Korkee, Mika Mattila, Pentti Haukkanen
The Bourque-Ligh conjecture states that if is a gcd-closed set of positive integers with distinct elements, then the LCM matrix $[S]=[\hbox{lcm}(x_i,x_j)…
math.CO2014
Studying the singularity of LCM-type matrices via semilattice structures and their Möbius functions
Mika Mattila, Pentti Haukkanen, Jori Mäntysalo
The invertibility of LCM matrices and their Hadamard powers have been studied a lot over the years by many authors. Bourque and Ligh conjectured in 1992 that the LCM matrix $[S]=[[…
math.NT2014★ 12 cited
On the eigenvalues of combined meet and join matrices
Mika Mattila
In this article we give bounds for the eigenvalues of a matrix, which can be seen as a common generalization of meet and join matrices and therefore also as a generalization of bot…