Tagging - 2024-06-16

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Martin Sleziak

3:35 AM

new-tag The tag theory-of-equations was created again. The most recen instance was just a few days ago.

Q: If $n$ is an even and $\alpha, \beta$ are the roots of the equation $x^2 + px + q = 0$ and also of the equation $x^{2n} + p^nx^n + q^n = 0$ ...

If $n$ is an even and $\alpha, \beta$ are the roots of the equation $x^2 + px + q = 0$ and also of the equation $x^{2n} + p^nx^n + q^n = 0$ and $f(x) = \frac{(1+x)^n}{1+x^n}$ where $\alpha^n + \beta^n ≠ 0, p ≠ 0$, find the value of $f(\frac{\alpha}{\beta})$ . I ve seen various interpretations f...

4 hours later…

Martin Sleziak

7:10 AM

Removed tags (from the most recent ones): main, meta.

Most frequent tag "cleaners": main, meta.

Created tags (from the most recent ones): main, meta.

Most frequent tag-creators: main, meta.

Recent tag-info edits: main, meta.

Recent suggested edits on tag-infos: main, meta.

Recent suggested edits: main

Orphaned tag-wikis: main, meta.

Tag-infos of synonymized tags: main, meta

Recently approved tag synonyms: main, meta.

Pending tag synonyms: SEDE, list on site - when viewing this list, only the synonyms where users has score >=5 in the master tag are shown.

Pending tag synonyms on meta: SEDE, list on site.

Tags with only one occurrence and no tag-wiki (which might be removed after 6 months, on meta 12 months): main, meta.

There was quite a lot of tag-related activity in the past few days.

deleted-tag Tag's that were removed recently: complex-measure, variation-of-measure, nuclear-spaces, formal-political-theory, locally-null, weingarten-surfaces, probability-puzzle, pac-learning and chebor.

BTW one of those queries lists empty tag-info for portals: math.stackexchange.com/posts/4933014/revisions math.stackexchange.com/posts/4933015/revisions - but I do not see the corresponding suggested edits in those queries.

6 hours later…

ryang

1:02 PM

@MartinSleziak Thanks for posting that new Question at meta.SE. The Answer there ("synonyms without merges shouldn't really exist......... In practice, an unmerged tag synonym will behave incorrectly. The software is not really designed for this case. Ask a moderator to merge the tags.") affirms my sentiments/suspicions that, given the dysfunction that I observed above, by design, the PL-tag situation is to be merely a transitory/interim/provisional status quo.

Martin Sleziak

1:25 PM

@ryang Of course, you shouldn't read too much into the opinion of a single user.

But I agree that having two big tags which are synonyms and are not merged is not optimal.

OTOH, in some situations there certainly are various reasons to avoid merging or at least not to do it immediately. (Although I am probably stating the obvious.)

ryang

1:55 PM

@MartinSleziak no, you're right

Martin Sleziak

2:10 PM

For the people who didn't see the previous part of this conversation, the question mentiond by ryang is this one: What are differences between synonyms with and without merging from the practical point of view?

At the moment, only one answer is posted:

A: What are differences between synonyms with and without merging from the practical point of view?

TL;DR: Effectively, tag synonyms cause the target tag to shadow the synonym. This only causes problems if the synonym exists. Merging knocks over a domino that deletes the source tag. A tag merge is a one-time action that: rewrites the tags of existing questions. does not bump questions. A tag ...

2 hours later…

Martin Sleziak

3:48 PM

@ryang In any case, in this particular instance, the main question is whether you plan to post about these specific on meta. (If the MSE community responds and clearly says whether they want the synonym or not, the moderators can act accordingly.)

Jun 13 at 13:24, by Xander Henderson

It seems to me that this needs to be discussed on meta. The tools I have tell me that the tag synonym was created in 2018, and "renamed" yesterday (I don't really know what that means). It is very hard to track the history of tags. :/

5 hours later…

Martin Sleziak

8:25 PM

Since there was a lot discussion about tag synonyms which haven't been merged, I created a post on Mathematics Meta. However, I am asking about the issue in general and not about this particular case.

I have used st-connectivity as an example - as you can see, it is still listed among the tags on these three questions - found using this SEDE query.

Q: Proving vertex form of Menger's Theorem et al. without using capacity of vertices.

I'm teaching an undergrad course in graph theory and have just finished the proof of Max Flow/Min Cut. So far I have used Diestel's definition (more or less) of flow network as a digraph $G$ with a capacity function $c: E\rightarrow \mathbb{N}$ and a flow function $f:E\rightarrow \mathbb{Z}$ sat...

combinatorics graph-theory path-connected graph-connectivity st-connectivity

Q: Relationship between ST-Path Ideals and ST-Cut Ideals?

Topic: st-connectivity, st-cut ideals and path ideals of a graph My Lemma: None of the st-cut-monomials vanish iff there is at least a st-path that does not vanish. Example ST-cuts: {{1,3,5,6},{1,3,7},{1,4,5,6},{1,4,7},{2,3,5,6},{2,3,7},{2,4,5,6},{2,4,7}} ST-paths: {{1,2},{3,4},{5,7},...

graph-theory ideals st-connectivity

Q: In Graph to tree: name of operation where edges removed and vertex/edge additions?

The graph has tree paths IN-1-OUT, IN-2-OUT and IN-3&4-OUT between IN and OUT in the left. I want to make each path to a branch like the right. What is the name of this operation or the name of this procedure to make a graph into a tree?

graph-theory terminology connectedness trees st-connectivity

We'll see whether there is some guidance from the mods on what to do in situations like this - and whether some users offer some comments and advice related to this issue.

@XanderHenderson If, for some reason, you prefer that this should be discussed among the moderators first - before being brought up on meta - feel free to let me know - and I can simply delete the question.

Feeds

Q: What should be the general procedure for tags which are synonymized but not merged?

On Mathematics Stack Exchange, there are several tag synonyms which haven't been merged; meaning that both the master tag and the synonym contain some questions.1 The situation when there is a synonym where the synonymized tag still contains some question is not optimal for several reasons.2 I'd ...