Girth
The length of the shortest Cycle in a Graph.
| Girth | Example |
| 3 | Tetrahedron |
| 4 | Cube,  |
| 5 | Petersen Graph |
- Pocklington-Lehmer Test
- Pocklington's Criterion
- Pocklington's Theorem
- Poggendorff Illusion
- Pohlke's Theorem
- Poincaré-Birkhoff Fixed Point Theorem
- Poincaré Conjecture
- Poincaré Duality
- Poincaré Formula
- Poincaré-Fuchs-Klein Automorphic Function
- Poincaré Group
- Poincaré-Hopf Index Theorem
- Poincaré Hyperbolic Disk
- Poincaré Manifold
- Poincaré Metric
- Poincaré Separation Theorem
- Poincaré's Holomorphic Lemma
- Poincaré's Lemma
- Poinsot Solid
- Poinsot's Spirals
- Point
- Point at Infinity
- Point Estimator
- Point Groups
- Point-Line Distance--2-D