👉 In mathematics, a subspherical set is defined as an open subset of a Euclidean space that contains only points with spherical coordinates (r, θ, φ). This means that every point in the subsphere has a unique radial distance from the origin. The radius of the subsphere is equal to the radius of the sphere it lies on.
For example, if we have an open ball B in R^3 centered at the origin, then its interior can be divided into two parts: the
subspherical