3
$\begingroup$

If $L$ is a lower triangular matrix of ones, does the following matrix have a special name?

$A = \left(\begin{matrix}L & -L \\ -L & L \end{matrix}\right)$

  • 1
    well I had it written as part of a solution to an LP formulation of a flow network, so perhaps graph theorists could have a $b$etter idea on what it's called.2011-10-10

1 Answers 1

1

It's a special type of "block matrix". Or, as user13838 points out, it can be described as a Kronecker product (or direct product).

(Or, you could just call it $A$.)