Timeline for Does $f$ have a critical point if $f(x, y) \to +\infty$ on all horizontal lines and $f(x, y) \to -\infty$ on all vertical lines?
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| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 25, 2020 at 17:29 | comment | added | user762914 | en.wikipedia.org/wiki/Sion%27s_minimax_theorem | |
| May 25, 2020 at 17:22 | history | answered | user762914 | CC BY-SA 4.0 |