Linking Number
A Link invariant. Given a two-component oriented Link, take the sum of 
crossings and 
crossingover all crossings between the two links and divide by 2. For components 
and 
,
where
is the set of crossings of with and 
is the sign of the crossing.The linking number of a splittable two-component link is always 0.See also Jones Polynomial, Link
References
Rolfsen, D. Knots and Links. Wilmington, DE: Publish or Perish Press, pp. 132-133, 1976.
- Plane Curve
- Plane Cutting
- Plane Division
- Plane-Filling Curve
- Plane-Filling Function
- Plane Geometry
- Plane Partition
- Plane Symmetry Groups
- Planted Planar Tree
- Plastic Constant
- Plat
- Plateau Curves
- Plateau's Laws
- Plateau's Problem
- Platonic Solid
- Plato's Number
- Platykurtic
- p-Layer
- Playfair's Axiom
- Plethysm
- Plot
- Plouffe's Constant
- Plumbing
- Pluperfect Number
- Plurisubharmonic Function