Rodrigues's Curvature Formula
where
is the unit Normal Vector and 
is one of the two Principal Curvatures.See also Normal Vector, Principal Curvatures- Partisan Game
- Partition
- Partition Function P
- Partition Function Q
- Part Metric
- Party Problem
- Parzen Apodization Function
- Pascal Distribution
- Pascal Line
- Pascal's Formula
- Pascal's Hexagrammum Mysticum
- Pascal's Limaçon
- Pascal's Rule
- Pascal's Theorem
- Pascal's Triangle
- Pascal's Wager
- Pasch's Axiom
- Pasch's Theorem
- Pass Equivalent
- Pass Move
- Patch
- Path
- Path Graph
- Path Integral
- Pathwise-Connected