👉 Retraction, also known as a negative curvature or a bending of space in an object, is one of the properties of a geometric shape that describes how it changes when you take a small amount of space away from the center. This can be thought of as a force pushing outward from the center towards the edges of the shape. For example, consider a square with sides of length 1 unit. If you were to draw a line from one corner of the square to the opposite corner, this would