Riesz Representation Theorem
Let 
be a bounded linear Functional on a Hilbert Space 
. Then there exists exactly one 
suchthat 
for all 
. Also, 
.
References
Debnath, L. and Mikusinski, P. Introduction to Hilbert Spaces with Applications. San Diego, CA: Academic Press, 1990.
- Picone's Theorem
- Piecewise Circular Curve
- Pie Cutting
- Pigeonhole Principle
- Pi Heptomino
- Pillai's Conjecture
- Pilot Vector
- Pinching Theorem
- Pinch Point
- Pine Cone Number
- Piriform
- Pisot-Vijayaraghavan Constants
- Pistol
- Pitchfork Bifurcation
- Pivoting
- Pivot Theorem
- Pizza Theorem
- Place (Digit)
- Place (Field)
- Place (Game)
- Planar Bubble Problem
- Planar Distance
- Planar Graph
- Planar Point
- Planar Space