1. Consider the open balls centered upon a common point, with any radius. 2. With help from Stacey, the babies open balls , bathing suits, dolls and books. 3. The open balls of a metric space are a unions of open balls . 4. The open balls of a metric space are a unions of open balls. 5. The closure of the open ball is usually denoted } }. 6. For example, an open ball is a contractible manifold. 7. He also complained about the Wilson U . S Open balls being used in the tournament. 8. This definition generalises to topological spaces by replacing " open ball " with " open set ". 9. An " n "-dimensional open cell is a topological space that is homeomorphic to the " n "-dimensional open ball . 10. The set of velocities satisfying is an open ball in and is called the space of "'admissible velocities "'in the literature.
