 The inverse of a Lehmer matrix is a tridiagonal matrix, where the superdiagonal and subdiagonal have strictly negative entries.Consider again the "n×n" "A" and "m×m" "B" Lehmer matrices, where "m">"n".A rather peculiar property of their inverses is that "A−1" is "nearly" a submatrix of "B−1", except for the "A−1n,n" element, which is not equal to "B−1n,n".