# Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?

From: Steve Kass <skass_at_drew.edu>

Date: Fri, 14 Feb 2003 21:10:10 -0500

Message-ID: <b2k7eu$ro$1_at_slb0.atl.mindspring.net>

Date: Fri, 14 Feb 2003 21:10:10 -0500

Message-ID: <b2k7eu$ro$1_at_slb0.atl.mindspring.net>

*>
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**>>>
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**>>Right. But there's no problem here, just as there's no problem
*

>>with the fact that matrix multiplication is not commutative, even

*>>though matrices can be considered a generalization of a set where
**>>the multiplication is commutative.
**>>
**>>
**>
**>I don't see how matrices can be viewed as generalization of sets. Matrices
**>are Linear Transformations, not sets.
**>
**>
*

My typo - I meant to say that matrices can be viewed as generalizations
of numbers, not of sets.

SK

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Received on Sat Feb 15 2003 - 03:10:10 CET