cv-pls real-analysis This seems very "personal advice-y" to me, and probably off-topic (despite the upvotes). Are there other opinions? How do I stop overcomplicating proofs?‭ - nars219‭ 2022-10-06 06:26:26Z

cv-pls geometry not math 90, 135, 180 degrees, but no 225, find the pattern‭ - user1098302‭ 2022-10-07 00:44:14Z

This answer is incomplete and incorrect, as explained in the comments.

C -also some comments are strange : "axiom of choice only necessary if infinite many elements are picked"

the accepted answer here has nothing to do with the question. Also $\bar 2$ for "$-2$" is a very strange notation.

D

I have voted to re-open this question and request that others also vote to re-open the question. I further request that before deciding, that you review the answer that I provided to the question.

is this off-topic ? If yes, why ?

To Peter : in my opinion, the question is not off-topic.

Another 0.999… question

C

@Ѕᴀᴀᴅ And of course an answer with several upvotes by someone who should know better.

@user2661923 There is no reason to reopen this post. The answer is based on a guess of what the author means. The question clearly is insufficient in context.

CD

→ 1 message moved to ­Trash

@Feeds I cannot even reach $10^7$ as a search limit and a commenter claimed to have reached $2^{29}$ and speaks of a "simple" program. Sigh ...

The commenter presented the code , I do not understand it at all, but I trust him.

Although it is hard to believe that he passed the range from $2^{29}$ to $2^{31}$ in a few minutes.

C

C1, C2, C3, C4,

C5, C6, C7, C8

D1, D2

Del PSQ & dupe of huge FAQ with high rep cherry picking

cv-pls elementary-number-theory I don't think that this quite crosses the line, but it is in poor taste, and (IMO) not really about mathematics. While it is old, I feel like it should maybe be closed and deleted. The sum of digits of 3(3x+3)3(3x+3) is always 99 for any xx between 11 and 99‭ - David Mulder‭ 2015-06-21 16:22:59Z

@XanderHenderson It is assuredly an eyesore, but I can see someone finding the explanation for how it works useful. I suppose a compromise would be to convert the image to text, and relabel the options (say with letters) to eliminate the poor taste

@rschwieb That would satisfy me, too. Personally, I don't find the question all that interesting, but my biggest objection is the tastelessness of the list of "results". But I need to go run a conference now, so I am off for the day. I might get to it on Sunday.

@XanderHenderson Right. I just submitted an edit now.

Now sanitized and duped, seems like everything is in its place.

@XanderHenderson It's a dupe of a FAQ (casting out nines) so it can be dleted without any loss.

@BillDubuque Seems like a variant duplicate that poses the material this way is useful, considering how an ordinary reader will probably find the formulations of the questions very far removed from each other. It's also a waste of delete votes, and gives ammunition to anyone wanting to portray our activity as overly revisionary on old questions.

@rschwieb But we also have many such "variants" too - many better than that.

@BillDubuque Curious you chose not to dupe those too, into its dupe list, then.

@rschwieb time

@BillDubuque Anyhow, I believe you there's better dupes with puzzle versions. The points I was making about it probably being a waste of delete votes and unnecessarily inflammatory for opponents of deletion are not going to go away.

@rschwieb I strongly disagree that we should compromise maintenance of site quality for the reasons you give ("waste of delete votes and unnecessarily inflammatory")

@rschwieb I have much more delete votes per day than I usually make. So I do not understand what you mean with a "waste of delete-votes"

Again, I am not really here today (but I am easily distracted), but: the setup of the problem as a "math troll" is, I think, relevant context. This indicates that the question is being asked by someone who may have essentially zero training in mathematics (the intended readership of the "troll" is clearly such an audience). Sending such an unsophisticated user down a very abstract rabbit hole (or expecting them to find that on their own) seems unfair.

I am copacetic with a dupe closure, I suppose, but I am very much opposed to outright deletion, unless there is a better version of the "puzzle" on the site somewhere.

psq math.stackexchange.com/q/4547412/29335

@BillDubuque I'm sure you do.

@Peter How many votes go unused is orthogonal to this: I'm just saying given a choice between deleting something old and exposing our activities to criticism, and deleting something new (in all likelihood, an even lower quality post) the latter has more utility.