Symbols:I/Identity Element

Identity Element

$i$ or $I$

Used (rarely) to denote the identity element of a group $\struct {G, \circ}$:

$\forall x \in G: i \circ x = x = x \circ i$

The $\LaTeX$ code for \(i\) is i .

The $\LaTeX$ code for \(I\) is I .

Sources

• 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): i or I: 3.