👉 In mathematics, "nonslander" refers to a surface or space that is not orientable (or nonorientable) in the sense of topology. This means that it cannot be embedded within an oriented three-dimensional Euclidean space. In other words, it does not have any orientation, meaning that there are no directions on the surface. Nonslender spaces can exist in a variety of contexts, including in the context of mathematical objects like surfaces and manifolds. They are often used
