Re: Comments on Norbert's topological extension of relational algebra

> Tegiri Nenashi wrote:
>

>> Assuming that algebra of binary relations is good fit for topology, 
>> then relations with
>> named attributes (database relations) most likely aren't.

I too don't fully understand it. You have commented in the past that the theory of multivariate relations
does not generalize the theory of binary relations. While this is true in the sense that some operations,
such as transitive closure, cannot be extended (at least, not straightforwardly), I do not see what
prevents you from using relation algebra (not relational algebra!) in the context of multivariate
relations, i.e., in databases, as a proper closed subsystem. Is it negation?

Nicola

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