Iverson bracket

Definition from Wiktionary, the free dictionary
Jump to: navigation, search

English[edit]

Etymology[edit]

Named after Kenneth E. Iverson, who introduced this notation in his programming language APL.

Noun[edit]

Iverson bracket (plural Iverson brackets)

  1. (mathematics) A notation that denotes a number that is 1 if the condition in square brackets is satisfied, and 0 otherwise, i.e. (where P is a true or false statement)
    [P] = \begin{cases} 1 & \text{if } P \text{ is true;} \\ 0 & \text{otherwise.} \end{cases}