Timeline for Property stronger than $T_1$ and weaker than regularity
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 11, 2023 at 11:16 | vote | accept | Ig.topolg | ||
| Feb 10, 2023 at 21:51 | answer | added | KP Hart | timeline score: 1 | |
| Feb 10, 2023 at 17:42 | comment | added | Wlod AA | @IosifPinelis, I’ll do it just for you -- I'll copy my comment, and will add one more observation (I am not in a situation where I can do a real search). | |
| Feb 10, 2023 at 17:36 | comment | added | Iosif Pinelis | @WlodAA : Interesting. You might want to answer, with bibliographical details, the question at mathoverflow.net/questions/440625/… | |
| Feb 10, 2023 at 17:33 | comment | added | Wlod AA | Historically, closed sets were before the open sets (I believe so). --#--#--#-- Also, notation F (for closed sets) comes from the French "Fermé"; then open G followed. | |
| Feb 10, 2023 at 17:28 | comment | added | Iosif Pinelis | @WlodAA : I wondered, though, why a standard notation for open sets is $G$ and that for closed sets is $F$. I mean, $F$ precedes $G$ in the alphabet, whereas opens sets are usually introduced before closed ones. | |
| Feb 10, 2023 at 17:21 | comment | added | Wlod AA | @IosifPinelis, yes, of course, "notation 𝐺 for closed sets is annoying" -- sorry for my misprint. | |
| Feb 10, 2023 at 17:18 | comment | added | Iosif Pinelis | @WlodAA : Did you mean "notation $G$ for closed sets is annoying"? | |
| Feb 10, 2023 at 17:09 | comment | added | Wlod AA | Notation G for open sets is annoying. Instead of F and G, you may have A and B. | |
| S Feb 10, 2023 at 14:51 | review | First questions | |||
| Feb 10, 2023 at 17:24 | |||||
| S Feb 10, 2023 at 14:51 | history | asked | Ig.topolg | CC BY-SA 4.0 |