Breeder
A pair of Positive Integers 
such that the equations
have a Positive Integer solution
, where 
is the Divisor Function. If is Prime, then
is an Amicable Pair (te Riele 1986). is a ``special'' breeder if |  |  | |
 | |  |
where
and 
are Relatively Prime, 
. If regular amicable pairs of type 
with 
areof the form 
with 
Prime, then 
are special breeders (te Riele 1986).
References
te Riele, H. J. J. ``Computation of All the Amicable Pairs Below 
.'' Math. Comput. 47, 361-368 and S9-S35, 1986.
- 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