3. Inverse of the Pascal Matrix Plus An Integer
In this section we are going to describe the inverse of Ln +kIn where
Ln is the lower triangular matrix of order n defined by (2), In is the
identity matrix and k is a positive integer. We call Ln +kIn the Pascal
matrix plus an integer. First, we are considering the case for k = 1. By
direct computation of the inverse of Ln+In, we can observe that there isa close relation between the inverse of Ln+In and the Pascal matrix Ln.
For example, for n = 4,