Orthonormal Basis
A Basis of Vectors 
which satisfy
or, in Tensor notation,
where
is the Kronecker Delta. An orthonormal basis is a normalized Orthogonal Basis.See also Basis, Orthogonal Basis- Prince Rupert's Cube
- Principal
- Principal Curvatures
- Principal Curve
- Principal Direction
- Principal Ideal
- Principal Normal Vector
- Principal Quintic Form
- Principal Radius of Curvature
- Principal Value
- Principal Vector
- Principal Vertex
- Principle
- Pringsheim's Theorem
- Printer's Errors
- Prior Distribution
- Prism
- Prismatic Ring
- Prismatoid
- Prismoid
- Prisoner's Dilemma
- Prizes
- Probability
- Probability Axioms
- Probability Density Function