if and only if
Conjunction
  1. (logic, mathematics) Is equivalent to; implies and is implied by; is true and false in the same cases as.
    A rectangle is a square if and only if all four of its sides have the same length.
    An integer is even if and only if its square is also even.
Related terms Translations
  • French: si et seulement si
  • German: genau dann, wenn, dann und nur dann, wenn
  • Italian: se e solo se
  • Portuguese: se e somente se
  • Russian: тогда и только тогда
  • Spanish: si y sólo si



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