Symbols:I/Identity Mapping

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Identity Mapping

$I_S$

Used to denote the identity mapping on a set $S$:

$\forall x \in S: \map {I_S} x = x$

When the set itself is understood, it is commonplace to leave out the subscript.


The $\LaTeX$ code for \(\map {I_S} x\) is \map {I_S} x .


Sources