Just my two cents: I think every new tag should be discussed on meta, and every removal of a tag should also be discussed. That way no one can say you're being capricious. (Or maybe they can, they just wouldn't be justified in doing so). For example, what happened to the sudoku tag? — Robert Soupe 5 hours ago
Find absolute maximum and minimum of the function
$f(x,y)=3-x^2+y^2$
on the region
$R = \{(x,y):1≥x≥0, 2≥y≥0\}$
I found that the gradient is
$∇f(x,y)=(2x,2y)$
and that the critical point inside the domain is (0,0) and it is a local minimum. I know I have to check the boundary, and I know h...
