Ajima-Malfatti Points
The lines connecting the vertices and corresponding circle-circle intersections in Malfatti's Tangent TriangleProblem coincide in a point 
called the first Ajima-Malfatti point (Kimberling and MacDonald 1990, Kimberling 1994). Similarly, letting 
, 
, and 
be the excenters of 
, then the lines 
, 
, and 
are coincident in another point called the second Ajima-Malfatti point. The points are sometimes simply called theMalfatti Points (Kimberling 1994).
References
Kimberling, C. ``Central Points and Central Lines in the Plane of a Triangle.'' Math. Mag. 67, 163-187, 1994. Kimberling, C. ``1st and 2nd Ajima-Malfatti Points.'' http://cedar.evansville.edu/~ck6/tcenters/recent/ajmalf.html. Kimberling, C. and MacDonald, I. G. ``Problem E 3251 and Solution. '' Amer. Math. Monthly 97, 612-613, 1990.
- Wigner 9j-Symbol
- Wigner-Eckart Theorem
- Wilbraham-Gibbs Constant
- Wilcoxon Rank Sum Test
- Wilcoxon Signed Rank Test
- Wild Knot
- Wild Point
- Wilf-Zeilberger Pair
- Wilkie's Theorem
- Williams p+1 Factorization Method
- Wilson Plug
- Wilson Prime
- Wilson Quotient
- Douady's Rabbit Fractal
- Double Bubble
- Double Bubble Conjecture
- Double Contraction Relation
- Double Cusp
- Double Exponential Distribution
- Double Exponential Integration
- Double Factorial
- Double Folium
- Double-Free Set
- Double Gamma Function
- Double Point