👉 Rectigrade is a mathematical concept in algebraic geometry, specifically used to represent a geometric object. It involves representing a point or line as an affine transformation that maps it to itself. In other words, a rectigrade function is a function that takes a point and returns the same point. Rectigrades are important in various areas of mathematics, including algebraic topology, differential geometry, and computer graphics. They have applications such as the representation of surfaces in 3D space as affine transformations
