Definition from Wiktionary, the free dictionary
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See also: Ø [U+00D8 LATIN CAPITAL LETTER O WITH STROKE], [U+2300 DIAMETER SIGN], and ø [U+00F8 LATIN SMALL LETTER O WITH STROKE]
U+2205, ∅
EMPTY SET

[U+2204]
Mathematical Operators
[U+2206]
U+29B0, ⦰
REVERSED EMPTY SET

[U+29AF]
Miscellaneous Mathematical Symbols-B
[U+29B1]

Translingual[edit]

English Wikipedia has an article on:
Wikipedia
English Wikipedia has an article on:
Wikipedia
English Wikipedia has an article on:
Wikipedia

Etymology[edit]

The set-theoretic meaning of this symbol was introduced by the Bourbaki group in their treatise Éléments de mathématique. André Weil has said in his autobiography that he based it on the Norwegian letter Ø.[1]

Symbol[edit]

  1. (set theory) A set with no elements: the empty set.
    Synonym: { }
  2. (linguistics) Alternative form of Ø: a null form.
  3. Alternative form of : the diameter sign.

References[edit]

  1. ^ A. Weil, The Apprenticeship of a Mathematician, chapter V "Strasbourg and Bourbaki", p. 114; Birkhäuser Verlag 1992

Hungarian[edit]

Suffix[edit]

  1. (linguistics) A null morpheme, with several functions:
    1. third-person singular indefinite form of verbs in the indicative and conditional moods (but not in the subjunctive)
    2. (optionally) the subjunctive/imperative suffix -j in the second-person singular definite short forms of most verbs
    3. at the end of the short form of the second-person singular indefinite subjunctive/imperative (more common than the long-form ending in -ál/-él)
    4. the nominative singular form of nouns, adjectives, numerals, (present, past, and future) participles, and pronouns
    5. (optionally) the accusative suffix after first- and second-person possessive suffixes, chiefly in the singular
    6. the positive degree of adjectives

See also[edit]

  • (symbol of omission)

Vietnamese[edit]

Etymology[edit]

From the empty set symbol.

Adjective[edit]

  1. Abbreviation of trống (empty).