Re: Can relvars be dissymetrically decomposed? (vadim and x insight demanded on that subject)

Cimode wrote:
> Aloha Kakuikanu wrote:
> > Cimode wrote:
> > > In general, relvars themselves, as opposed to their projections .
> >
> > By "projection" you don't mean RA projection, or do you?
> What does RA stand for?

RA is relational algebra.

> I mean relvars projections from multidimensional representation to
> bidimensional representation as Rtables.

There is nothing 2-dimensional about relations. A relation normally is considered to be a set of n-dimensional vectors. A recent post http://groups.google.com/group/comp.databases.theory/msg/f7bdd36e39086909?hl=en& claims that relations are 0-dimensional varieties. Received on Sun Jul 16 2006 - 15:48:15 CDT