Timeline for Blow up at an ordinary double point
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 6, 2023 at 17:45 | history | edited | Serge the Toaster | CC BY-SA 4.0 |
Correction
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| Apr 6, 2023 at 17:44 | comment | added | Serge the Toaster | @Sasha You are right. I corrected the question accordingly. Thanks! | |
| Mar 30, 2023 at 4:52 | comment | added | Sasha | It is a sum of three squares. | |
| Mar 29, 2023 at 19:45 | comment | added | Serge the Toaster | @Sasha why? Locally at $o$, $X$ would be a sum of squares by Morse's lemma. | |
| Mar 29, 2023 at 17:49 | comment | added | Sasha | This is incorrect --- locally at $o$ the strict transform looks like a neighborhood of a smooth rational curve with self-intersection $-2$. | |
| Mar 29, 2023 at 17:29 | history | asked | Serge the Toaster | CC BY-SA 4.0 |