Tagging - 2020-06-21

Martin Sleziak

02:38

new-tag A new tag pyramid Harish Chandra Rajpoot.

0

Q: Who discovered the formula for the volume of the pyramid?

Who or when it was discovered the formula for the volume of a pyramid? $${\text{Height} \times \text{Base Area}\over 3}$$ And what does the proof looks like? (It must be something without calculus I guess).

Martin Sleziak

03:50

I see that the tag suggestions is now being removed on meta (thanks to YuiTo Cheng). There are just two questions remaining.

3

Q: How to export my favorite questions on stack-exchange as pdf?

Is there a way to export my favorite questions merged as pdf? If there is no such thing why don't you think about it?

support export suggestions

-5

Q: Accepting your own answer

Why does MSE allows accepting your own answers on your question? As I cannot upvote my own post, I think accepting your own answer should also be prohibited or there should be an option that if 5 or more people rate it as acceptable then and only then it should become acceptable

discussion accepted-answer suggestions

Posts where the tag suggestions was added removed (including the editors): data.stackexchange.com/meta.math/query/1105163/… data.stackexchange.com/meta.math/query/1038474/…

Most frequent taggers/removers for suggestions: data.stackexchange.com/meta.math/query/1146497/… data.stackexchange.com/meta.math/query/1038477/…

Deleted questions with suggestions: data.stackexchange.com/meta.math/query/883845/…

Martin Sleziak

05:00

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

Created tags (from the most recent ones): 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.

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.

Martin Sleziak

06:13

new-tag meta A new tag ios was created on meta by Glorfindel.

2

Q: Math numbers rendered as FaceTime phone number

In a recent answer of mine, I noticed that a chain of equations renders correctly on my laptop but incorrectly on iPad and iPhone. The iPad/iPhone treats a particular number as if it is a phone number. It then inserts a FaceTime link which messes up the LaTeX/MathJax rendering, making the answer ...

bug mathjax ios

Martin Sleziak

07:20

I wanted to add a tag-info for ios.

I have added something, but not exactly I what i wanted.

Now I am getting error when I am trying to edit it further.

Can somebody check whether it is editable by other users and only I am getting this error?

I was trying to insert this text:

> For questions about the usability of Stack Exchange sites and features on iOS devices.

And I used this as the edit summary:

> Basic tag-info copied from meta.stackexchange.com/tags/ios/info

tag-wikis I hope that this will be sorted eventually. Still, I was thinking that in addition to the above text (copied from Meta Stack Exchange), it might be useful to mention also that there are separate tags ios-app and mobile-web.

Here is a link to the tag-info and the revision history.

I have searched on Meta Stack Exchange for similar error messages. I found this: Tag-wiki edit submit gets error, clearer reasons requested, Wiki-tag edit error is non-descriptive and other posts linked there.

However, it seems that the answers and comments there say that this is because the suggested edit queue was full. This does not seem to be the case now, moreover this wasn't a suggested edit, since I have sufficient privileges to edit tag-wikis.

Ok, so now I was able to edit it without getting the same error.

I have edited tag excerpt:

> For questions about the usability of Stack Exchange sites and features on iOS devices. There are also tags (mobile-web) and (ios-app).

And also the tag-wiki:

> For questions about the usability of Stack Exchange sites and features on iOS devices. Notice there are also separate tags mobile-web and ios-app - so they should be used too for questions where they are suitable.

Of course, if you have some suggestion how to improve the tag-info, please, go ahead and edit it.

@Glorfindel Since you are the creator of this tag, I wanted to mention that I have created a basic tag-info and ask you whether something should be added (or changed/removed).

You cannot be pinged in this room using @username, so I have invited you into this room - as far as I know, that should give you some king of notification.

I also wanted to thank you for your work on Mathematics Meta.

Glorfindel

09:08

@MartinSleziak you're welcome.

@MartinSleziak no, it's fine this way :)

Martin Sleziak

Thanks for having a look!

BTW I am not really sure what to think about the error message I was getting.

Glorfindel

Me neither. Sometimes it helps having your browser console open.

But if it says 'Internal Server Error' you're still none the wiser.

Martin Sleziak

Maybe it is possible that it was rate limiting (since I was trying to edit relatively soon after the first edit). But in that case I would expect error message saying something like "you're only allowed to do this once in 60 seconds you should wait". (Rather than just: "An error occurred submitting the post."

Glorfindel

Yeah, there's a dedicated error message for that.

Martin Sleziak

I do not have much experience with stuff like that. In Chrome I get to console through Ctrl+Shirt+I, right?

@Glorfindel Do you mean opening the console after I get error message but while it is still displayed? Or opening it after I get error message and check what I can see there?

Glorfindel

09:17

@MartinSleziak not sure - I'm on a Mac.

when I say 'console' I meant the developer tools in general

Martin Sleziak

Let me try this with two edits after each other - to see what I get there with the rate limiting error message.

Glorfindel

Sometimes you'll see something in the console, but there's also a 'Network' tab in the developer tools.

Martin Sleziak

Hm... I did not get any error message.

Glorfindel

no, that's the problem with non-reproducible bugs :)

Martin Sleziak

And the revision only shows the final result - similarly as for edits on posts within grace period. math.meta.stackexchange.com/posts/4507/revisions

Ok, I was probably too slow.

Now I finally got: "You can perform this action again in 10 seconds"

Glorfindel

09:21

If you have 20k, the rate limit is 10 seconds; for me, it's 30.

Martin Sleziak

But I am not really sure what part of the developer tools would give me some useful information about this error message. (Or about the original one, if I manage to reproduce it again.)

I should try to play around with tag wikis when I have a bit more time. Maybe this bug manifest only if a new tag-wiki is being created as in this case. (Not when editing the existing ones.)

Glorfindel

In the Network tab (if you opened the developer tools before the error occurs) you can see which call to the server gives an error.

It will have a status code indicating an error (4xx / 5xx) but sometimes there is more information.

One case where that is helpful is detecting the line where your SEDE query fails: meta.stackexchange.com/a/281623/295232

Martin Sleziak

Interestingly, with the "10 seconds" error, the status codes that I see are only 101, 200 and 204.

I am not sure to which extent the stuff is visible from the screenshot. (The first part is missing, but I have clicked on the Status column to order it by Status.)

Anyway, it is more important whether we would see there in the case of the problematic error message mentioned above. (The rate-limiting message is expected.)

Glorfindel

@MartinSleziak yeah, it's the request whose 'Name' is '105' (second from the bottom).

If you open it, I guess you see the response contains the rate limit message.

Martin Sleziak

Ok, I managed to get the same error on another tag-wiki.

And there is something with status 500 .

Glorfindel

09:38

If you click on it, somewhere you should see details about this request.

Martin Sleziak

Request URL: math.meta.stackexchange.com/edit-tag-wiki/submit/389
Request Method: POST
Status Code: 500

Glorfindel

Including a response tab.

Martin Sleziak

I have the response tab but I am not really sure what I am looking for.

I can share it with you through pastebin or something like that if you're willing to have a look.

Glorfindel

yes please

Martin Sleziak

Or I could share the Window with you using Google Meet if it's better.

Glorfindel

09:42

pastebin is fine

If that doesn't contain the information I'm looking for, there's no way for us to provide more details in the bug report.

Martin Sleziak

Or maybe there is some other option.

This is what I copy-pasted from the reponse tab: pastebin.com/uAhhZYhQ

But even if there's nothing in the developers tools, I think I have found out how to reproduce this. (Although I might soon run out of empty tag-wikis where to test this.)

Glorfindel

@MartinSleziak if you save that as HTML, you can see it's the generic 500 Error page. So no luck :(

@MartinSleziak well, that's good news :)

Martin Sleziak

I see. That's the same thing which I get in the Preview tab, right?

Glorfindel

yes

Martin Sleziak

Is there something else I should be looking for in the developer tools?

Glorfindel

09:46

that's easier :)

Martin Sleziak

I see this in Headers, not sure whether it is relevant:

> Referrer policy: no-referrer-when-downgrade

Glorfindel

I'd have to look up what that means exactly, but I don't think it's relevant.

Martin Sleziak

Ok.

If I plan to make a bug report, I should probably make some screenshots also from developer tools.

Glorfindel

If you indicate which request fails (in this case, the POST request to https://math.meta.stackexchange.com/edit-tag-wiki/submit/389), that it returns a 500 status code and the generic error page, that's enough information.

(well, it might be good to note that you did use the developer tools but found no further information)

Martin Sleziak

Ok, so I will not bother with copying other information that I see there.

Just in case, I'll leave that window open for a bit - in case somebody has some suggestion what to look for.

Thanks for your help.

I'll try to write down a bug report.

Glorfindel

09:52

@MartinSleziak sure, there are people with more knowledge about these things than me.

Martin Sleziak

10:10

0

Q: Problem with editing an empty tag-info

When creating a new tag-wiki, I have encountered a somewhat unusual error message saying: "An error occurred submitting the post." I have seen some older posts with similar error messages: Tag-wiki edit submit gets error, clearer reasons requested, Wiki-tag edit error is non-descriptive (and the ...

bug edits tag-wiki

Glorfindel

10:22

+1

Martin Sleziak

Thanks!

quid

12:30

On math.meta we have tag "user-names" on the main meta it is "display-names"? Change, synonym, leave? Any opinions?

I think "display name" is the more commonly used term on SE but user name might be more intutive

Martin Sleziak

Posts where the tag user-names was added removed (including the editors): data.stackexchange.com/meta.math/query/1105163/… data.stackexchange.com/meta.math/query/1038474/…

Deleted questions with user-names: data.stackexchange.com/meta.math/query/883845/…

Embarrassingly short tag-excerpt: math.meta.stackexchange.com/posts/8524/revisions

Just checking who is to blame. :-)

quid

Better short than empty.

Martin Sleziak

I have checked filters to see where else user-names and display-names are used.

So I see user-names on our meta and on Information Security.

quid

For the former mostly our meta end security main

Indeed.

Martin Sleziak

I see displaynames on Meta Stack Exchange and on meta.SO.

Maybe I might have missed some sites. (There must be a way to find this using SEDE, but this is above my skills. I don't have experience with multisite queries.)

I would say that synonym might be useful. And I do not think that it matters that much in which direction.

quid

12:44

I tend to make display names the main tag and keep user names as a synonym.

Martin Sleziak

I don't think it would be good to completely remove (user-names), since some of our users might be already use to it.

quid

I agree with that.

Martin Sleziak

There is some advantage to consistency with Meta Stack Exchange. If our users go there or if some user come from there to here, it is easier for them to use the correct tags.

And sometimes people search over all sites, consistent tags might be useful also in such cases: stackexchange.com/search?q=%5Buser-names%5D stackexchange.com/search?q=%5Bdisplay-names%5D

I have mentioned all things which could influence the decision about this and which I was able to think of.

@quid Yes, that seems like a reasonable thing to do.

quid

Yes. There might also be some distinction to be made. The display name is the one that is displayed. There could be a user name for login purposes, but that always seems to be an email on SE.

Martin Sleziak

On Meta Stack Exchange, the synonyms for display-names are usernames and past-names: meta.stackexchange.com/tags/display-names/synonyms

quid

12:49

I'll wait if ever somebody wants to weigh in and then just do this. The synonyms for meta-tags are pretty niche as a subject.

Martin Sleziak

Seeing the past-names I guess they had many questions about old usernames, but than decided to put them under the same tag and created a synonym.

I have pinned the first message you posted about this issue. Perhaps it slightly increases the likelihood that somebody notices it.

user185131

13:58

I would also suggest keeping [display-names] as the master tag and [user-names] as its synonym.

Martin Sleziak

15:03

new-tag A new tag torus was created by Ri-Li. The tag-info is empty.

2

Q: Show that if the induced homomorphism $f_*:\pi_1(T\#T,x_0) \to \pi_1(T\#T,f(x_0))$ is 1-1 then it is onto.

Let $T$ be a torus and suppose $f: T\#T \to T\#T$ is a continuous map. Show that if the induced homomorphism $f_*:\pi_1(T\#T,x_0) \to \pi_1(T\#T,f(x_0))$ is 1-1 then it is onto. I know that $ \pi_1(T\#T,x_0)=\Bbb Z^2 \star \Bbb Z^2$. Initially, I was thinking that any 1-1 homomorphism would be on...

general-topology algebraic-topology fundamental-groups torus

0

Q: Identify the following surface as a connected sum of either or projective planes with holes

The picture looks like a connected sum of 4 tori with two holes. Am I correct or is there any other algorithm that I don't know. P.S: I am sorry for giving a picture like this but I got this question in an old question paper and didn't get a better way to represent it.

general-topology algebraic-topology proof-writing solution-verification torus

Martin Sleziak

18:02

Today there was more activity in this room that usual.

Martin Sleziak

18:53

tag-wikis meta I have created the tag-info for keyboard-shortcuts simply as a test to see whether I will be able to reproduce the bug mentioned above. Originally, I just copy-pasted it from Meta Stack Exchange, but then I made a few small edits. math.meta.stackexchange.com/posts/31974/revisions math.meta.stackexchange.com/posts/31973/revisions

I should have probably wait a bit before making changes - the edits are in the same revision (grace period). I should have edited the tag-wiki in such way, that it would be distinguishable what was copy-pasted and what was changed.

Transcript for

$Mathematics$ Tagging