Banzhaf Power Index
The number of ways in which a group of 
with weights 
can change a losing coalition (onewith 
) to a winning one, or vice versa. It was proposed by the lawyer J. F. Banzhaf in 1965.
References
Paulos, J. A. A Mathematician Reads the Newspaper. New York: BasicBooks, pp. 9-10, 1995.
- Icositruncated Dodecadodecahedron
- Ida Surface
- Ideal
- Ideal Number
- Ideal (Partial Order)
- Ideal Point
- Idele
- Idemfactor
- Idempotent
- Identity
- Identity Element
- Identity Function
- Identity Map
- Identity Matrix
- Identity Operator
- Idoneal Number
- Iff
- Ill-Conditioned
- Illumination Problem
- Illusion
- Image
- Imaginary Identity
- Imaginary Number
- Imaginary Part
- Imaginary Point