Timeline for Checking $f(x_1,y_1)f(x_2,y_2)-f(x_1,y_2)f(x_2,y_1) \ge 0$
Current License: CC BY-SA 4.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 2, 2018 at 11:29 | vote | accept | Xing Wang | ||
| Sep 2, 2018 at 3:38 | history | answered | Igor Rivin | CC BY-SA 4.0 |