ABSTRACT
A linear problem is to determine y from the equation Z { y } = F t $$ {\mathcal{Z}}\{ y\} = F_{t} $$ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315108858/f4dff3a2-1feb-457b-a709-022257f02721/content/math3_1.tif"/>
