Timeline for Generalize characterization of upper semicontinous functions
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| S Apr 25, 2017 at 3:04 | history | bounty ended | CommunityBot | ||
| S Apr 25, 2017 at 3:04 | history | notice removed | CommunityBot | ||
| Apr 18, 2017 at 23:31 | comment | added | Idonknow | Yes, you are right. | |
| Apr 18, 2017 at 19:05 | comment | added | Jochen Voss | Does ``to be $F_\sigma$'' mean to be a countable union of closed sets? | |
| S Apr 17, 2017 at 1:05 | history | bounty started | Idonknow | ||
| S Apr 17, 2017 at 1:05 | history | notice added | Idonknow | Draw attention | |
| Apr 15, 2017 at 13:04 | history | edited | Idonknow | CC BY-SA 3.0 |
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| Apr 15, 2017 at 3:15 | history | edited | Idonknow | CC BY-SA 3.0 |
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| Apr 15, 2017 at 3:12 | comment | added | Idonknow | By similar, i mean can we obtain an equivalent statement for the statement 'for any real number $c$, preimage $f^{-1}(-\infty,c)$ is $F_{\sigma} $. Actually I am trying to generalize definition of u.s.c. in terms of $\varepsilon $. | |
| Apr 15, 2017 at 1:37 | comment | added | Alexandre Eremenko | What does it mean "similar"? (2) cannot stand as it is because it is equivalent to u.s.c., and your condition is not. | |
| Apr 15, 2017 at 0:57 | history | edited | Idonknow |
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| Apr 15, 2017 at 0:50 | history | edited | Idonknow | CC BY-SA 3.0 |
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| Apr 15, 2017 at 0:37 | history | asked | Idonknow | CC BY-SA 3.0 |