<< Just an observation - why quote Wikipedia when Affine Space, Functions etc. are defined at mathworld.wolfram.com

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There seems to be an assumption here that MathWorld is somehow a superior reference, at least in this case, to Wikipedia. I know of no grounds for this assumption. --Dan ________________________________________________________________________________________ "Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read." --Groucho Marx