# Capital I Symbol

The capital Latin letter I is used in math to represent the identity matrix sometimes with subtext to represent the size of the matrix.

For example, the symbol appears in an expression like this:

I_2 = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix}

In plain language this means that the expression I_2 is equal to the square identity matrix with a width and height of two. More generically the expression I_n represents the identity matrix with a width and height of n.

Symbol Format Data
I Unicode
73

I TeX
I
SVG