In their paper, A Note on Pascal’s Matrix, Cheon, Kim, and Yoon
found an interesting factorization of the lower triangular Pascal matrix,
Ln.
Theorem 2.8. [4] Let Gk =
In−k OT
O Sk
be a matrix of order n, where Sk is the matrix of order k defined by:
sij =
(
1 if i ≥ j
0 j>i
for every k = 1, 2, ..., n. Then the lower triangular Pascal matrix of
order n can be written as: Ln = GnGn−1 · · · G1.
For example,