Reciprocal GCD Matrices and LCM Matrices
Scott J. Beslin · The Fibonacci Quarterly · 1991
Let S = {xis x2s... » xn} be an ordered set of distinct positive integers. The nxn matrix [S] = (sij)s where s^- = (xi, Xj) s the greatest common divisor of Xi and Xj, is called the greatest common divisor (GCD) matrix on S. The study of GCD matrices was initiated in [1], In that paper, the authors