Namespaces
Variants
Actions

Identity map

From Encyclopedia of Mathematics
Revision as of 20:14, 24 September 2016 by Richard Pinch (talk | contribs) (Start article: Identity map)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

on a set $X$

The transformation on $X$, often denoted $1_X$ or $\text{id}_X$ defined by $x \mapsto x$ for all $x \in X$.

How to Cite This Entry:
Identity map. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Identity_map&oldid=39297