Lecture on Sretches and Shears

General purpose of this lecture is to present on Sretches and Shears. There are numerous ways to apply transformations to functions to create new functions. A shear mapping is a linear map that displaces each point in fixed direction, by an amount proportional to its signed distance from a line that is parallel to that direction. This type of mapping is also called shear transformation, transvection, or just shearing.