Upper triangular need to be interpreted as possessing only zero entries underneath the leading diagonal, which begins with the higher remaining corner. Case in point[edit] A A A B A C A D A E A F A G A H A I A J A K A L http://sexy-womens-robes-and-kim08652.blogprodesign.com/17826214/5-easy-facts-about-how-t-u-an-l-b-d-described