When I worked in the aerospace industry many years ago, such a matrix was maintained manually. Today, software takes care of this function. Another option, though, is to use Excel.

A subrequirement that derives from multiple primary requirements can be achieved using the concatenation of the cells in the reference coupled with a line-feed character. For example, if CEI ...

A formula for various generalized inverses of a partitioned complex matrix is established under certain general conditions. The use of this formula in obtaining the Moore-Penrose inverse of an ...