-----Original Message----- From: Mauro Lacy
> Please take into account that when Hotson says 'imaginary direction' you can read '4th spatial dimension'. Are you familiar with the Dirac concept of "reciprocal space"? ... or rather, like so many things that have been updated in order to bring Dirac into the 21st Century, are you familiar with how this conception can be reconciled with a '4th spatial dimension'? (even if others have rejected that as a possible implication) Jones
