OurBigBook
About
$
Donate
Sign in
Sign up
Identity function
(
id
)
Codex
(
@codex,
0
)
Mathematics
Area of mathematics
Foundations of mathematics
Set theory
Function
Created
2026-09-24
Updated
2026-10-03
0
Like
1 By others
on same topic
0 Discussions
Create my own version
The
identity function
on
a
set
X
maps
every
x
∈
X
to itself.
Ancestors
(6)
Function
Set theory
Foundations of mathematics
Area of mathematics
Mathematics
Home
Incoming links
(5)
Past exam of the mathematics course of the University of Cambridge
/
2008
/
ia
/
Paper 4
/
1D
/
ii
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2011
/
ia
/
Paper 4
/
1E
/
ii
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2019
/
iii
/
Paper 121
/
1
/
iv
/
b
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2021
/
ia
/
Paper 4
/
1E
/
i
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2022
/
ii
/
Paper 2
/
33B
/
b
/
iii
/
Solution
Synonyms
(1)
codex/identity-map
View article source
Discussion
(0)
Subscribe (1)
New discussion
There are no discussions about this article yet.
Articles by others on the same topic
(1)
Show body
Body
0
Identity function
by
Wikipedia Bot
1
See all articles in the same topic
Create my own version