Timeline for Independent conditions imposed by points in different planes
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 1, 2020 at 10:48 | vote | accept | user130022 | ||
| Feb 16, 2020 at 10:43 | comment | added | user130022 | Sorry I got the answer. Probably we can move the point in the 2nd plane or in 1st plane to get that generality hypothesis. thanks. | |
| Feb 16, 2020 at 10:41 | comment | added | user130022 | Can we impose that generality assumption from the generality assumption on points in the plain ? sorry for bothering you again | |
| Feb 16, 2020 at 10:37 | comment | added | user130022 | Now i have understood. Thank you very much. | |
| Feb 16, 2020 at 10:32 | comment | added | Sasha | Assume for simplicity that the pencil has no conics containing $L$. Then $t \mapsto C'_t \cap L$ defines a map $\mathbb{P}^1 \to S^2L = \mathbb{P}^2$ (its image is, in fact, a line). On the other hand $C'' \cap L$ defines a point of $S^2L$. So, the extra generality assumption that you need is that the above line in $S^2L$ does not contain the above point. | |
| Feb 16, 2020 at 10:26 | comment | added | user130022 | Thank you very much for the answer. I have a silly question: why there is no $t$ such that (*) hols ? | |
| Feb 16, 2020 at 9:43 | history | answered | Sasha | CC BY-SA 4.0 |