Let $I$ be an D1128: Inner product space over $\mathbb{C}$ such that

(i)	$0_I$ is a D737: Zero vector in $I$
(ii)	$\langle \cdot, \cdot \rangle$ is the D34: Inner product in $I$
(iii)	$x \in I$ is a D1129: Vector in $I$

Then \begin{equation} \langle x, 0_I \rangle = \langle 0_I, x \rangle = 0 \end{equation}