Proof of a conjugate property
If it is known that S = V x I* :
\$S = V \cdot \overline I \Rightarrow \$
\$\overline I = {S \over V}\Rightarrow \$
\$\overline {\overline I} = \overline {({S \over V})} \Rightarrow \$
\$I = \overline {({S \over V})} \Rightarrow \$
\$I = {\overline S \over \overline V} \$
Going from the third expression to the fourth uses &quot;property I&quot;, and going from the fourth to the fifth expression uses &quot;property V&quot; as described here. I don't know if those are the commonly used names for those properties.