Formulas
- Proxmap sort
- Prüfer group
- Pseudopolynomial time number partitioning
- Pseudosphere
- Pursuit curve
- Push–relabel maximum flow algorithm
- Pycnonuclear fusion
- Pyramid (geometry)
- Pythagorean quadruple
- Pythagorean trigonometric identity
- Pythagorean triple
- Péclet number
- Q0 (mathematical logic)
- QCD vacuum
- QUADPACK