Elfangor Shouldn't this be in the category of Algebraic Geometry?
- If you like. I have added that category. Apologies - it's not an area of mathematics I understand well. --prime mover 10:37, 2 January 2011 (UTC)
Why order reversing?
Still need explained why the operations $I$ and $Z$ are order reversing. That's why I put the explanation request in there. Just saying that they are is not enough. So I put the explanation request back.--prime mover 20:08, 6 January 2011 (UTC)