Arc Second
A unit of Angular measure equal to 1/60 of an Arc Minute, or 1/3600 of a Degree. The arc second is denoted 
(not to be confused with the symbol for inches 
).
- Blow-Up
- Blue-Empty Coloring
- Blue-Empty Graph
- Board
- Boatman's Knot
- Bochner Identity
- Bochner's Theorem
- Bode's Rule
- Bogdanov Map
- Bogomolov-Miyaoka-Yau Inequality
- Bohemian Dome
- Bohr-Favard Inequalities
- Bolyai-Gerwein Theorem
- Bolzano Theorem
- Bolzano-Weierstraß Theorem
- Bolza Problem
- Bombieri Inner Product
- Bombieri Norm
- Bombieri's Inequality
- Bombieri's Theorem
- Bond Percolation
- Bonferroni Correction
- Bonferroni's Inequality
- Bonferroni Test
- Bonne Projection