Elements of matrix E are defined by the similar formulas, however, its elements do not commute.
2.
The a _ { i, j } elements of matrix A are determined for a given basis E by applying A to every \ vec e _ j = [ 0 0 \ ldots ( v _ j = 1 ) \ ldots 0 ] ^ T, and observing the response vector
3.
This book became a book from which a whole generation of Italian students ( and in some Universities also non-Italian students ) have learnt the theoretical scheme of Piero Sraffa, expressed in matrix notation ( with a mathematical appendix devoted to the basic elements of matrix algebra ) and the Input-Output analysis of Wassily Leontief.