« first day (2617 days earlier)      last day (1804 days later) » 

1:43 AM
0
Q: How sould basic questions about transfinite ordinals and cardinals be tagged?

Henning MakholmI was about to retag this question when I noticed that neither of the elementary-set-theory or set-theory tags seems to really want questions of this tag. The tag wikis say: elementary-set-theory This tag is for elementary questions on set theory, spanning topics usually found in introd...

 
3 hours later…
4:43 AM
2
Q: How should basic questions about transfinite ordinals and cardinals be tagged?

Henning MakholmI was about to retag this question when I noticed that neither of the elementary-set-theory or set-theory tags seems to really want questions of this tag. The tag wikis say: elementary-set-theory This tag is for elementary questions on set theory, spanning topics usually found in introd...

I will just point out that revision 4 of the [tag-info for elementary-set-theory] contained "transfinite induction, well-orders, ordinal and cardinal arithmetic". It was removed in revision 5. See also this comment exchange around the time when the tag-info was edited. — Martin Sleziak 4 mins ago

Are ordinals elementary topic?

Sep 3 '17 at 12:33, 17 hours 41 minutes total – 23 messages, 1 user, 0 stars

Bookmarked 2 mins ago by Martin Sleziak

in Martin Sleziak's room, 11 secs ago, by Martin Sleziak
@AndrésE.Caicedo I just wanted to make sure that you are aware of this question on meta: How should basic questions about transfinite ordinals and cardinals be tagged? Since you have edited the tag-info to remove "transfinite induction, well-orders, ordinal and cardinal arithmetic", it's quite likely that you have something to say about this topic.
I did not see any messages by Andrés E. Caicedo in this room, so if I wanted to ping him, I had to do so elsewhere.
 
14 hours later…
7:16 PM
A new tag was created by Paracosmiste. The same user posted some time ago this on meta: The geometry-without-trigonometry tag. Later reposted in the tag management thread: chat.stackexchange.com/transcript/3740/2019/6/23
0
Q: The set of point $MA+\lambda MB=k$

Paracosmiste$A$ and $B$ are fixed points and $k,\lambda\in\mathbb{R}$. If $\lambda=1$ and $AB<k$ we obtain an ellipse. If $\lambda=-1$ and $AB<k$ we obtain an hyperbola. For $|\lambda|\neq 1$, the equation of the locus has the form $\displaystyle y=\sqrt{bx^2+cx+d+\sqrt{mx+n}}$. What is known about the geo...


« first day (2617 days earlier)      last day (1804 days later) »