Irrotational Field
A Vector Field 
for which the Curl vanishes,
See also Beltrami Field, Conservative Field, Solenoidal Field, Vector Field
- Probability Measure
- Probability Space
- Probable Error
- Probable Prime
- Problem
- Procedure
- Proclus' Axiom
- Procrustian Stretch
- Product
- Product Formula
- Product-Moment Coefficient of Correlation
- Product Neighborhood
- Product Rule
- Product Space
- Program
- Projection
- Projection Operator
- Projective Collineation
- Projective General Linear Group
- Projective General Orthogonal Group
- Projective General Unitary Group
- Projective Geometry
- Projective Plane
- Projective Plane PK2
- Projective Space