Howell Design
Let 
be a set of 
symbols, then a Howell design 
on symbol set is an 
array 
such that
- 1. Every cell of is either empty or contains an unordered pair of symbols from ,
- 2. Every symbol of occurs once in each row and column of , and
- 3. Every unordered pair of symbols occurs in at most one cell of .
References
Colbourn, C. J. and Dinitz, J. H. (Eds.) ``Howell Designs.'' Ch. 26 in CRC Handbook of Combinatorial Designs. Boca Raton, FL: CRC Press, pp. 381-385, 1996.
- Volterra Integral Equation of the First Kind
- Volterra Integral Equation of the Second Kind
- Volume
- Volume Element
- Volume Integral
- von Aubel's Theorem
- von Dyck's Theorem
- von Mangoldt Function
- von Neumann Algebra
- von Staudt-Clausen Theorem
- von Staudt Theorem
- Voronoi Cell
- Voronoi Diagram
- Voronoi Polygon
- Voting
- VR Number
- Vulgar Series
- W2-Constant
- Wada Basin
- Walk
- Wallace-Bolyai-Gerwein Theorem
- Wallace-Simson Line
- Wallis Cosine Formula
- Wallis Formula
- Wallis's Conical Edge