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Difference between revisions of "Identity function"
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Latest revision as of 14:56, 28 December 2010
Given a set X, the function id: X → X given by f(x) = x is called the identity function.
A trivial function but there are issues to be discussed:
- What if X is a topological space?
- What if X is a group?
A slightly less trivial function is the inclusion.
