ABSTRACT
Let https://www.w3.org/1998/Math/MathML"> u = ( u 1 , u 2 , … , u m ) v = ( v 1 , v 2 , … , v m ) w = ( w 1 , w 2 , … , w m ) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003449652/afdcc6b9-9be3-4ad4-883c-989795168de8/content/math12_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
