Re: PLI: aspects of <clivu>

["Paulo S.L.M. Barreto" <pbarreto@uninet.com.br>]

la stivn. cusku di'e
> In space-time the time dimension has a Sqrt[-1]
> factor when you take the sqrt of the sum of the squares of the differences
> ofthe time-space coordinates as the distance between events.

This is the old-fashioned Minkowski space-time convention. It's better to use
real coordinates in a metric with signature {-1, -1, -1, 1}: this not only
simplifies
general relativity calculations, but is also somehow more intuitive (after
all, physical measurements always refer to real quantities).

la djan. cusku di'e
>Lojban list once spent a >year< discussing relativistic spacetime

What a pity! I wasn't here to follow that thread. Sigh...

co'o mi'e paulos.