Bell number

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English[edit]

English Wikipedia has an article on:
Wikipedia

Etymology[edit]

Named after Eric Temple Bell, who wrote about them in the 1930s.

Noun[edit]

Bell number (plural Bell numbers)

  1. (combinatorics) Any member of a sequence of numbers that count the possible partitions of a set, such that the nth number Bn is the number of different ways to partition a set that has exactly n elements.