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23 votes
4 answers
2k views

Are professional Physicists, Computer Scientists, Engineers, Economists... not allowed to ask questions at MO?

"MathOverflow is a question and answer site for professional mathematicians." May other professional researchers ask questions at MO? Should they check their credentials at the door? If not, and ...
André Levy's user avatar
13 votes
3 answers
754 views

Flagging spam user

I just noticed an "Autobiographer" badge awarded to this unusually named user: https://mathoverflow.net/users/117744 . I immediately moved to flag this obviously spam account, only to realise that ...
LSpice's user avatar
  • 9,947
21 votes
2 answers
1k views

Ignoring certain users' postings

This old post on meta stackexchange contains a script that hides posts from users of your choice. There were some negative comments there and the script doesn't seem to be working anymore (maybe ...
Felipe Voloch's user avatar
18 votes
1 answer
593 views

Influx of ridiculous number of spam users – what to do?

There is currently an absolutely ridiculous influx of spam user profiles: almost the entire "recent badges" section in the right-hand column of the main page is full of Autobiographer badges ...
gmvh's user avatar
  • 2,526
55 votes
5 answers
10k views

What happened to the dear user "quid" (9072), they appear deleted?

What happened to the dear user "quid" (9072), they appear deleted? Noticed this by edits I remember were from them. Google still remembers them and the user page of user number 9072 returns 404 (...
joro's user avatar
  • 23.8k
29 votes
3 answers
2k views

Celebrity usernames

The question "naive de Rham cohomology fails for singular varieties" (naive de Rham cohomology fails for singular varieties) recently received an apparently useful answer from a user with the name "...
Sam Hopkins's user avatar
  • 20.7k
10 votes
2 answers
541 views

the number of on line users at a given moment

Is there a way to realize that, at a given moment, how many users are (MO) on line? Thank you
Ali Taghavi's user avatar
8 votes
3 answers
614 views

Community standard for contacting users off of MO?

If a user is using their full name as their user name, what, if any, is the community standard with regards to emailing that user using their independently found work email address about their ...
Trevor J Richards's user avatar
83 votes
3 answers
4k views

MathOverflow user jailed

I know this is off-topic, not even being a question. MathOverflow user Kıvanç Ersoy has been jailed, apparently for signing a petition. Edit: As mentioned in comments, there is a petition about ...
Jeremy Rickard's user avatar
43 votes
2 answers
2k views

How to cite comment by unknown user disproving Erdős conjecture?

I believe that fedja has disproved a conjecture of Erdős et al. when commenting on my question Almost monochromatic point sets, but I'm unable to contact fedja regarding this. What shall I do? Shall I ...
domotorp's user avatar
  • 18k
10 votes
1 answer
339 views

How to report intrisically spammy user accounts?

Sometimes, I notice that some very odd username is listed on Home as having earned the "Autobiographer" badge, where by "odd" I mean something very much non-mathematical and ...
gmvh's user avatar
  • 2,526
2 votes
2 answers
396 views

Is it possible to list all mathoverflow users from a given country?

Is it possible to produce the list all mathoverflow users from a given country?
Lviv Scottish Book's user avatar