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Can anyone point me to short survey articles of mathmatical expositions of Codd's relational algebra and calculus (from database theory)?

I suspect there's some straightforward categorical interpretation of these. (NB I'm aware of David Spivak's[1] intriguing application of category theory to databases, but I'm after an application to the specific models of relational algebra and calculus themselves).

[1] http://math.mit.edu/~dspivak/

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I hope you will get suitable answers to this question. Afterwards, there is a general theory of relation algebras and cylindric algebras developed by Alfred Tarski and his followers which may interest you. The original literature can be somewhat terse, so I recommend a web search before you tackle it. Gerhard "Ask Me About System Design" Paseman, 2011.08.24 –  Gerhard Paseman Aug 24 '11 at 22:03

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