Definition: In mathematics, a "kelev" (or "kervel") is a mathematical notation used to denote a vector in a higher-dimensional Euclidean space. It is often used in geometric and computational contexts where one wants to represent vectors that have a magnitude but do not necessarily have a direction. The kevles can also be used for vector spaces, which are generalizations of the traditional 3D Euclidean space, but with additional dimensions. For example, in 4-dimensional Euclidean