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Shouldn't it be "Ring (algebra)? Puzzled! Or perhaps just ignorant! David Martland 15:05 Dec 6, 2002 (UTC)

Talk:Linear_algebra says: "Toby and I are going to correct this and I think we're also going to write about linear algebra over a rig (algebra)? (this is not a typo!)." And googling for 'rig algebra' seems to suggest that it's a different and real thing. I don't know anything about the subject either, but it looks like this is right. --Camembert
Also see the antepenultimate paragraph of Distributivity, which gives a brief explanation of what one is. --Camembert

Interesting - thanks for explanation. I look forward to the article. David Martland 15:17 Dec 6, 2002 (UTC)