e/Kirkwood approximation

Information
has gloss	eng: The Kirkwood superposition approximation was introduced by Matsuda (2000) as a means of representing a discrete probability distribution. The name apparently refers to a 1942 paper by John G. Kirkwood. The Kirkwood approximation for a discrete probability density function P(x_1},x_2},\ldots ,x_n}) is given by
lexicalization	eng: Kirkwood approximation
instance of	c/Discrete distributions