∅
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]
 | ||||||||
| ||||||||
 | ||||||||
| ||||||||
Translingual
Etymology
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
∅
- (set theory) A set with no elements: the empty set.
- (linguistic morphology) A null morpheme; a theoretical morpheme used in models of linguistic analysis to represent the absence of a morpheme where one might otherwise be expected.
See also
- ∅- (the zero prefix)
- -∅ (the zero suffix)
- -∅- (a zero prefix in Navajo)
- null determiner
References
- A. Weil, The Apprenticeship of a Mathematician, chapter V "Strasbourg and Bourbaki", p. 114; Birkhäuser Verlag 1992
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.