Irreducible Tensor
Given a general second Rank Tensor 
and a Metric 
, define
 |  |  | (1) |
 | |  | (2) |
 | |  | (3) |
where
is the Kronecker Delta and 
is theLevi-Civita Symbol. Then | |
 | |
 | (4) |
, 
, and 
are Tensors of Rank 0, 1, and 2.See also Tensor- Perpendicular Bisector
- Perpendicular Foot
- Perrin Pseudoprime
- Perrin Sequence
- Perron-Frobenius Operator
- Perron-Frobenius Theorem
- Perron's Theorem
- Persistence
- Persistent Number
- Persistent Process
- Perspective
- Perspective Axis
- Perspective Center
- Perspective Collineation
- Perspective Triangles
- Perspectivity
- Pesin Theory
- Petersen Graphs
- Petersen-Shoute Theorem
- Peters Projection
- Peter-Weyl Theorem
- Petrie Polygon
- Petrov Notation
- Pfaffian Form
- p-Good Path