Re: Can relational alegbra perform bulk operations?

From: Tegiri Nenashi <>
Date: Thu, 1 Oct 2009 10:03:11 -0700 (PDT)
Message-ID: <>

On Sep 30, 7:37 pm, David BL <> wrote:
> I would have thought that set theory itself cannot be regarded as an
> algebraic structure - because it is not possible to form the set of
> all sets (by Russell).  

May I suggest that the problem is the set theory foundation -- the set membership operation? After all, one can't possibly think of the least pretty operation from algebraic perspective. Contrast it to intersection, union, and (relative) complement -- which form Boolean algebra on a powerset. Received on Thu Oct 01 2009 - 19:03:11 CEST

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