1. ## difference

may i know what is the difference between a special linear group and a special unitary group. both have determinant 1 and are matrices...seems the same to me

thanks!

2. For example,

$A=\begin{bmatrix}{1}&{0}\\{1}&{1}\end{bmatrix}$

belongs to the special linear group ( $\det A=1$ ) but not to the special unitary group ( $A$ is not unitary ) .

Fernando Revilla