I thought it was Euler that did this. But I can imagine Gauss doing it too.

Time to upgrade to Ubuntu 22.04 or Debian 12

This cat has the same suspicious look my old cat had growing up every time I pulled out my film SLR with an attached flash. He didn’t like the flash and would run after I snapped a couple pics of him. These days, I doubt he’d blink at phone snapping a pic w/o flash.