1+1
Appearance
1+1 is a mathematical expression that evaluates to:
- 2 (number) (in ordinary arithmetic)
- 1 (number) (in Boolean algebra with a notation where '+' denotes a logical disjunction, see logical disjunction#Definition)
- 0 (number) (in Boolean algebra with a notation where '+' denotes 'exclusive or' operation, see Boolean algebra#Values, or in a quotient ring of numbers modulo 2)
The terms 1+1, One Plus One, or One and One may refer to:
1+1
- 1 + 1 + 1 + 1 + ⋯, a mathematical divergent series
- 1+1 (channel), a Ukrainian TV channel
- 1+1 (album), a 1972 album by Grin
- 1 + 1 (album), a 1997 duet album by Herbie Hancock and Wayne Shorter
- 1+1 (song), by Beyoncé Knowles
One Plus One
- OnePlus One, an Android smartphone
- One Plus One, original title of Sympathy for the Devil (film)
- One Plus One, 2002 graphic novel published by Oni Press
- OnePlusOne, (Marriage and Partnership Research) founded in 1970 by Dr Jack Dominian
One and One
- One and One (musical)
- One and One (song)
- A type of free throw in basketball
- Dublin slang for a serving of fish and chips
Other
- One & One (musical comedy) - an original off-Broadway musical comedy by Dianne Adams (music and lyrics) Fred Bennett (book), and Richard O’Donnell (book, music and lyrics).
- 1&1 Internet, a web hosting company
See also
- One and One Is One (disambiguation)
- One Plus One Is One (2004 album), album by Badly Drawn Boy