Skip to main content
fixed TeX
Source Link
Robin Chapman
  • 20.8k
  • 2
  • 66
  • 81
Source Link
Robin Chapman
  • 20.8k
  • 2
  • 66
  • 81

The standard example is to let $X$ be the affine plane over a field, and $U=X-\{(0,0)\}$.