Formulas
- Parametrization (geometry)
- Parseval's theorem
- Partial differential equation
- Partially ordered set
- Particular values of the Riemann zeta function
- Particular values of the gamma function
- Partition of a set
- Pascal's pyramid
- Pascal's triangle
- Capelli's identity
- Capillary surface
- Carathéodory's existence theorem
- Carathéodory's theorem (conformal mapping)
- Carathéodory kernel theorem
- Carathéodory metric