__STRAIN, SETS OF PARALLEL LINES__

__SETS OF PARALLEL LINES__

A line such as y=mx+k before deformation can get the form through ** Eulerian**
specification:

y'=[(-cx'+ay')/(ad-bc)]=m[(dx'-by')/(ad-bc)]+k

y'=[(c+dm)/(a+bm)]x'+k[(ad-bc)/(a+bm)]

which gives the transformed sets of lines after deformation:

y'=Mx'+K