Incidence Matrix
For a 
-D Polytope 
, the incidence matrix is defined by
The
th row shows which s surround 
, and the 
th column shows which 
s bound 
.Incidence matrices are also used to specify Projective Planes. The incidence matrices for a Tetrahedron 
are | 1 |  |  |  |
| 1 | 1 | 1 | 1 | 1 |
 |  |  |  |  |  |  |
| 1 | 0 | 0 | 0 | 1 | 1 |
| 0 | 1 | 0 | 1 | 0 | 1 |
| 0 | 0 | 1 | 1 | 1 | 0 |
 | 1 | 1 | 1 | 0 | 0 | 0 |
 |  |  |  |  |
| 0 | 1 | 1 | 0 |
| 1 | 0 | 1 | 0 |
| 1 | 1 | 0 | 0 |
| 1 | 0 | 0 | 1 |
| 0 | 1 | 0 | 1 |
| 0 | 0 | 1 | 1 |
 | |
| 1 |
| 1 |
| 1 |
| 1 |
- 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
- Book Stacking Problem