Definition:Block Triangular Matrix/Lower

Definition

A block lower triangular matrix $\mathbf A$ is a block triangular matrix with submatrices $A_{i j}$ such that $A_{i j}$ is a zero matrix for $i < j$.

Also see

• Definition:Block Upper Triangular Matrix

• Results about block lower triangular matrices can be found here.

Sources

• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): block triangular matrix