From en.wikipedia.org:
[extension]
[Wikipedia's extended confirmed protection]
EXTENSION, EXTEND or EXTENDED may refer to:
[TOC right]
** Mathematics
*** Logic or set theory
- Axiom of extensionality
- Extensible cardinal
- Extension (model theory)
- Extension (proof theory)
- Extension (predicate logic) , the set of tuples of values that satisfy the predicate
- Extension (semantics) , the set of things to which a property applies
- Extension (simplicial set)
- Extension by definitions
- Extensional definition , a definition that enumerates every individual a term applies to
- Extensionality
*** Other uses
- Extension of a function , defined on a larger domain
- Extension of a polyhedron , in geometry
- Extension of a line segment (finite) into an infinite line (e.g., extended base )
- Exterior algebra , Grassmann's theory of extension, in geometry
- Field extension , in Galois theory
- Group extension , in abstract algebra and homological algebra
- Homotopy extension property , in topology
- Kolmogorov extension theorem , in probability theory
- Linear extension , in order theory
- Sheaf extension , in algebraic geometry
- Tietze extension theorem , in topology
- Whitney extension theorem , in differential geometry
** Music
- Extension (music) , notes that fit outside the standard range
- _Extended_ (Solar Fields album) , 2005
- _Extension_ (George Braith album) , 1964
- _Extension_ (Clare Fischer album) , 1963
- _Extensions_ (Ahmad Jamal album) , 1965
- _Extensions_ , a 1969 album by Mystic Moods Orchestra
- _Extensions_ (McCoy Tyner album) , 1970
- _Extensions_ (Dave Holland album) , 1988
- _Extensions_ (The Manhattan Transfer album) , 1979
- Extension (The Extended Mixes), 2023 album reissue by Kylie Minogue
** Places
- Extension, British Columbia , a village near Regional District of Nanaimo, British Columbia, Canada
- Extension, Louisiana , unincorporated community, United States
** Science
- Extension (geology) , relating to the pulling apart of the Earth's crust and lithosphere
- Extension (anatomy) , a movement at a joint that increases the angle between the two ends of the joint; the opposite of flexion
- Extension locus, the gene locus of Melanocortin 1 receptor
** Other uses
- Agricultural extension service
- Cooperative State Research, Education, and Extension Service , a former division of the U.S. Department of Agriculture
- Extension, the building of community capacity by outsiders, for instance agricultural extension
- Browser extension , a small software module for customizing a web browser
- Building extension
- Continuing education , or extension school, a school for continuing education
- Extension (metaphysics) , the property of stretching out or taking up space
- Extension (telephone) , telephone line attached to a main line or to a PBX or Centrex system
- Extension cord , power cable with a plug on one end and one or more sockets on the other end
- Eyelash extensions , material applied to eyelashes
- Hair extensions , strands of hair added to existing hair
- Filename extension , for computer file systems
** See also
- Extensive (disambiguation)
[Disambiguation]