"Brian Morrison" wrote in message
...
On Wed, 25 Feb 2015 00:32:59 +0000 (UTC)
Brian Reay wrote:

If you look in the archives you will see him referring to 'negative
frequency'

Genuine DSP gurus refer to negative frequency too, they simply mean
the opposite phasor in the pair, the one rotating clockwise instead of
anti-clockwise on the Real-Imaginary axis diagram.


And also the negative X-Axis on the Laplacian complex plane.