LA8

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Show that the identity matrix $I\,$ is self-adjoint.

$\langle Ix, y\rangle$	$= \langle x, y\rangle$
	$= \langle x, Iy\rangle$

Therefore, $I\,$ is the adjoint of $I\,$ , or, in other words, $I\,$ is self-adjoint.

Main Page : Linear Algebra

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