Euler's Theorem
A generalization of Euler 
published a proof of the following more generaltheorem in 1736. Let 
denote the Totient Function. Then
for all
Relatively Prime to 
.See also Chinese Hypothesis, Euler's Displacement Theorem, Euler's Distribution Theorem, Fermat's Little Theorem, Totient Function
References
Shanks, D. Solved and Unsolved Problems in Number Theory, 4th ed. New York: Chelsea, p. 21 and 23-25, 1993.
- Winkler Conditions
- Winograd Transform
- Wirtinger's Inequality
- Wirtinger-Sobolev Isoperimetric Constants
- Witch of Agnesi
- Witness
- Wittenbauer's Parallelogram
- Wittenbauer's Theorem
- Witten's Equations
- Wolstenholme's Theorem
- Woodall Number
- Woodbury Formula
- Word
- World Line
- Worm
- Worpitzky's Identity
- Writhe
- Wronskian
- Wulff Shape
- Wynn's Epsilon Method
- Wythoff Array
- Wythoff Construction
- Wythoff's Game
- Wythoff Symbol
- x-Axis