The line at infinity
I foolishly said this on Twitter about a month ago:
| David Butler: | My PhD supervisor used to say 2 conics share 4 points - maybe coincident, maybe complex, maybe on the line at infinity. |
| Tina Cardone: | on the line at infinity? Tell me about those! |
| David Butler: | Can of worms! Will need to write something and post later. |
At the time I declared this was a bit of a can of worms and I promised to write something and post it later. Well, here it is. But it might take a few blog posts to untangle it.
听