Timeline for $h$ is identity as soon as $h(\Sigma)\cap \Sigma$ contains at least 5 points
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 13, 2019 at 11:24 | comment | added | Soby | oh right how silly of me to look over that. Thank you so much! | |
| Jan 13, 2019 at 10:15 | comment | added | Fedor Petrov | $h$ is uniquely defined by the images of four points, this is the basic fact about projective transformations of the plane | |
| Jan 13, 2019 at 9:50 | comment | added | Soby | Hi. Thank you very much for your reply. May I clarify a few things? For case 1) why is $h(p_i)=p_{f(p_i)}$ uniquely determined for $i=1,2,3,4$ and how does this suggest $h(p_5)=p_{f(p_5)} $ does not hold generically? | |
| Jan 13, 2019 at 9:30 | vote | accept | Soby | ||
| Jan 13, 2019 at 9:13 | history | answered | Fedor Petrov | CC BY-SA 4.0 |