nullary sum

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English[edit]

Noun[edit]

nullary sum (plural nullary sums)

  1. (arithmetic) An empty sum.
    • 2012, Robert Harper, Practical Foundations for Programming Languages, ISBN 9781107029576, p. 86:
      These concepts are expressed by sum types, specifically the binary sum, which offers a choice of two things, and the nullary sum, which offers a choice of no things.

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