12:58 AM
@amWhy I completely agree with quick response to very low quality posts with down/close votes like this one: math.stackexchange.com/q/2406074/9464. I'm a little bit hesitant to vote to delete it immediately. Maybe the [on hold] tag could suggest the newly coming users think about how to ask their questions in a better way? In that way, I can save my delete votes for the "old dead" questions/answers.

1:13 AM
@Jack That makes a lot of sense, too. Thanks for your response; you've got me seriously thinking about your good reasons.

3 hours later…
4:03 AM
I voted to close 2137685: How to find $\sum_{n=0}^{\infty}\frac{1}{2^{2^n}}$? as a duplicate of 583472: Sum of Infinite Series $1 + 1/2 + 1/4 + 1/16 + \cdots$, but several user voted to leave open in the review. Did I miss some reason why it is not a duplicate? Or should I have chosen other direction?
There is also a third duplicate 788772: How to sum this series to infinity: $\sum_{n=0}^{\infty} \frac1{2^{2^n}}$. Do you think some of there three questions 583472, 788772, 860295 could (should) be merged?

2 hours later…
6:35 AM
Should the two questions remain open? 2406362: How to solve the iterated function $f(f(x))=x^2+x$? and 911818: How to obtain $f(x)$, if it is known that $f(f(x))=x^2+x$?. To me they seem as clear duplicates, but I've decided to ask first.
Mainly because I see that an experienced user (Will Jagy) posted answer to the new question explicitly mentioning the old thread (so he is aware of it) and did not vote to close

2 hours later…
8:23 AM
@MartinSleziak Seeing that the question already has two off-topic close votes, I added my vote to close as a duplicate.

2 hours later…
10:11 AM
@MartinSleziak @MathematicsAminPhysics: I think those belong to the Math Mods room, since it's really their responsibility to handle it. I guess the description of this room was not clear enough, but it applies only to posts on Math SE. I'll change it accordingly to clarify it.

I guess the description is quite clear - at least to users who visited the room a few times. But occasionally some culprits (such as me) ignore it and chat here about something else. :-)

10:29 AM
@MartinSleziak By the way, do you think we should rename it to CRUDE without all the dots? =D
in This is the Realm of Simply Beautiful Art, Aug 16 at 22:28, by amWhy
@Mithrandir CRUDE: "Close Reopen Undelete Delete Edit" Acronym. So you would have that "If I remember Correctly" be I.I.R.C.?"

And what were your plans to rename it to?

To me that does not make much difference. If you prefer the shorter one, go ahead.
BTW I have mentioned this room in the main chat room again. (After all, amWhy mentioned that she wants more transparency and more users, so promoting the room a bit might help.)

10:55 AM
room topic changed to CRUDE: For feedback/discussion/requests of Close/Reopen/Undelete/Delete/Edit for questions and answers on Math SE [close] [delete] [duplicate]  [reopen] [undelete]

11:21 AM
@MartinSleziak The question was close, majority of the users chose to close as a duplicate. revisions/timeline

12:17 PM
@user21820 lol
@MartinSleziak no idea, I thought it was a quite obvious dupe. I can agree with merging though
@MartinSleziak I think they are dupes and they've second link is now closed as such.
@MartinSleziak oh, you already have that covered

2 hours later…
2:24 PM
@SimplyBeautifulArt @amWhy @Jack: PSQ here should be closed.

1 hour later…
4:04 PM
-1

If you want to use implicit differentiation rather than the chain rule we have: $$x^2+y^2=1$$ $$(x+dx)^2+(y+dy)^2=1$$ $$x^2+2x.dx+dx^2+y^2+2y.dy+dy^2=1$$ Neglecting nilsquare terms and substituting for $y^2$ and $y$: $$x^2+2x.dx+(1-x^2)+2(\sqrt{1-x²})dy=1$$ $$\frac{dy}{dx}=\frac{-x}{\sqrt{1-x²}}... Another exponential nonsense: math.stackexchange.com/a/2008880/9464 4:22 PM @Jack This other answer to that question is also mathematically nonsense, being an invalid quantifier swapping. @user21820 I've already done so (even downvoted). @Jack Already closed when I arrived. @Jack Already voted to close (only one more close vote needed). @Jack: Anyway I'll wait for the consensus on Meta about that one selfawareuser, before I continue voting on those kind of posts. @Jack Already cast my close vote. @Jack Except for this egregious case which it seems you haven't voted to delete yet. Hey @heather lol, wrong room 4:27 PM hello nope, right room. oh, okay lol my page refreshed; i don't know if that made me pop in and out. @Jack As for the subsequent links you provide, Six of them, I acted on one. You need to spread these links over time. Voting to close six posts of one user likely gets reversed, and from what I understand, if reversed, you are precluded from acting to close them subsequently. 5:08 PM @user21820 I did so. Maybe the system reversed my vote as @amWhy pointed out. 1 A difficult question. Since it was me who pulled the trigger, let me give a “confession”. I have seen mainly three different kinds of "bad" questions in MSE so far: Spams; please-do-my-homework-I-don't-know-anything-about-it type questions; the question is mathematically ill-defined but might... @SimplyBeautifulArt 5:23 PM @Jack oh yeah, I did see that this morning @Jack @user21820 Acted on this, just now; now it's deleted. 5:36 PM To be honest, I doubt that serial voting reversal script also works for delete votes and close votes. But I was unable to find a post stating this explicitly, perhaps with the exception of this - which is not really about this issue: Serial closing? 5:58 PM @SimplyBeautifulArt @Did, @Jack, @MartinSleziak Please review this question: math.stackexchange.com/questions/2406912/…. I believe it should be closed. 6:11 PM @SimplyBeautifulArt, @Jack, @Did, @ParamanandSingh Needs to be closed. -1 How do I arrange these numbers so that they add up to a 2 digit number? 6:30 PM @amWhy open for deletion 2 hours later… 8:18 PM One more delete vote, @Did, @SimplyBeautifulArt needed for math.stackexchange.com/questions/2406890/… One more delete vote needed for math.stackexchange.com/a/2008880/9464 One more delete vote, @SimplyBeautifulArt, @amWhy, @user21820 needed for math.stackexchange.com/a/1855452/9464 8:40 PM @Jack Hey, @Jack. Maybe you can pin the last two? I've voted to delete three or four of this user's answers today. But I'm willing to come back, to check their status tomorrow. Pinning the two delete requests (on the right the screen in this chat will make them highly visible, without having to check the transcript of the chat to revisit the answers in question. Once they are deleted, we can unpin the alerts. @amWhy: how to pin the requests? @Jack Hover over the entry, left of the comment/request to get the upside-down triangle; do you see "pin this comment" (or "pin") in the menu? If not, perhaps only room owners (there are a handful of us) can do so. I'll go ahead to pin them. I don't see that. But can see "star as interesting" for other's comments. 9:08 PM @Jack refresh the page @Jack, @SimplyBeautifulArt, @Did A question in need of closing this question, asked yesterday. 9:25 PM @Jack vote to close the question as well @SimplyBeautifulArt Couldn't resist commenting to Bill. Bill needs to have the last word, always.... I will refuse to respond to it, because I think I made my point clear. @SimplyBeautifulArt, @Did, @ParamanandSingh This question, my last link above, is open for deletion now. math.stackexchange.com/questions/2405734/… @SimplyBeautifulArt You there? (err, you here?) 9:51 PM @amWhy Oops, yes, er no, I'm not here, but over there, but yet, I'm somewhere around these parts. @amWhy I'm not going to delete yet. I'd rather see if the OP responds to his/her meta post and does any attempt to correct first. I'll wait till tomorrow. @SimplyBeautifulArt That's very reasonable. :) 1 hour later… 11:10 PM @Jack Now deleted - revisions/timeline. Unstarring and unpinning. @Jack Now deleted - revisions/timeline. Unstarred and unpinned. @Jack Now deleted - revisions/timeline. Unstarred and unpinned. @amWhy Indeed, posts can be pinned by room owners and moderators. (Since you are one of the room owners, you can add Jack to the room owners - if you wish to do so.) You can do that in the access tab. @MartinSleziak I know how to access that link; thanks, though. 11:34 PM One more delete vote needed for this one: -3$$f'(x)=\frac{f(x+\varepsilon)-f(x)}{\varepsilon}[2]^{2'}=\frac{(2+h)^2-2^2}{h}=4+h(\frac{1}{[2]})'=\frac{\frac{1}{2+h}-\frac{1}{2}}{h}=\frac{\frac{-h}{4+2h}}{h}=\frac{-1}{4+2h}$$NB First answer given. 11:51 PM Vote to close: -2 How can I get$$\sum_{k=0}^n\binom{n}{k}(pe^t)^kq^{n-k}=(pe^t+q)^n? I'm having a real problem, trying to figure out this equation. Can you, help me with that ?

2

@Jack For me, no can do.
@Jack put mine in.