Spherical Harmonic Closure Relations
The sum of the absolute squares of the Spherical Harmonics 
over all valuesof 
is
The double sum over
and 
is given by
where
is the Delta Function.- Postulate
- Potato Paradox
- Potential Function
- Potential Theory
- Pothenot Problem
- Poulet Number
- Power
- Power Center
- Power (Circle)
- Power Curve
- Powerfree
- Powerful Number
- Power Line
- Power Point
- Power Rule
- Power Series
- Power Set
- Power Spectrum
- Power (Statistics)
- Power Tower
- Power (Triangle)
- P-Polynomial
- p(prime)-Group
- P-Problem
- Practical Number