，有序偶，有序对- payoff table
- payoff vector
- p-basis
- PBIB-design
- p-block
- p-class
- p-class group
- p-class number
- PC method (= predictor-corrector method)
- p-complement
- p-component
- p-conductor
- p-conjugate element
- p-convexity
- p-convex subset
- p-coordinate
- p-coprimary module
- p-covector
- PC-point (= pedal-cevian point)
- PCT theorem
- p-cyclic complex
- PDE (= partial differential equation)
- p-dependent numbers
- PDF (= probability density function)
- p-direction