Let $z, w \in \mathbb{C}^{N \times 1}$ each be a D5689: Complex column matrix.
The dot product of $(z, w)$ is the D1207: Complex number
\begin{equation}
\sum_{n = 1}^N z_n \overline{w}_n
\end{equation}
▶ | D6241: Euclidean real dot product |