On Wed, Apr 22, 2020 at 4:36 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > Surely Lockhart[1] got this > definition from someplace, though, and didn't invent it out of thin air. >
I actually viewed quite a few YouTube math videos between then and now and looking at it now it seems familiar. It is basically treating the points as if they were a representation of complex numbers with x being real and y being imaginary. https://en.wikipedia.org/wiki/Complex_number (Multiplication and Division sections) David J.
