Re: I think my book may be wrong about cardinality, but I'm not sure
Date: Thu, 26 Jul 2007 09:38:04 -0500
"Cimode" <cimode_at_hotmail.com> wrote in message
> On 26 juil, 03:13, "Bruce C. Baker" <b..._at_undisclosedlocation.net>
>> Each tuple in a relation with N attributes corresponds to a point in an >> N-dimensional space, with each attribute being orthogonal to all of the >> others.
> What does that mean ? How is a single attribute orthogonal to N-1
> attributes part of the same relation?. What do you exactly designate
> as *orthogonality*? Why would a tuple necessarily be a point and not
> a line ofr plane in geometrical N-space?
> What about degree 0/1 relations? How does a degree 0 relation
> represent a point in space?
The answers to all your questions can be found in any linear algebra textbook. Received on Thu Jul 26 2007 - 16:38:04 CEST