One-Form
A linear, real-valued Function of Vectors such that 
.Vectors and one-forms are Dual to each other because Vectors areContravariant (``Kets'': 
) and one-forms areCovariant Vectors (``Bras'': 
), so
The operation of applying the one-form to a Vector
is called Contraction.See also Angle Bracket, Bra, Differential k-Form, Ket- Pentakis Dodecahedron
- Pentalpha
- Pentangle
- Pentatope
- Pentatope Number
- Pentomino
- Percent
- Percentage Error
- Percolation Theory
- Percolation Threshold
- Perfect Box
- Perfect Cubic
- Perfect Cuboid
- Perfect Difference Set
- Perfect Digital Invariant
- Perfect Information
- Perfect Magic Cube
- Perfect Number
- Perfect Partition
- Perfect Proportion
- Perfect Rectangle
- Perfect Ruler
- Perfect Set
- Perfect Square
- Perfect Square Dissection