Kollros' Theorem
For every ring containing 
Spheres, there exists a ring of 
Spheres, each touching each of the Spheres, where
The Hexlet is a special case with
.See also Hexlet, Sphere
References
Honsberger, R. Mathematical Gems II. Washington, DC: Math. Assoc. Amer., p. 50, 1976.
- Brown Numbers
- Brown's Criterion
- Broyden's Method
- Bruck-Ryser-Chowla Theorem
- Bruck-Ryser Theorem
- Brunnian Link
- Brunn-Minkowski Inequality
- Brun's Constant
- Brun's Sum
- Brun's Theorem
- Brute Force Factorization
- B-Spline
- B-Tree
- Bubble
- Buchberger's Algorithm
- Buckminster Fuller Dome
- Buffon-Laplace Needle Problem
- Buffon's Needle Problem
- Bulirsch-Stoer Algorithm
- Bullet Nose
- Bumping Algorithm
- Bundle
- Burau Representation
- Burkhardt Quartic
- Burnside Problem