@TedShifrin I made an incorrect statement earlier, getting forgetful, the modification I was referring to is known as the Levenberg Marquardt algorithm.

Yikes.

@Horiatiki It is not clear to me what problem you are trying to solve. Your notation leaves a lot to be desired. Are you trying to choose $\mu$ so that $F_\mu(k)$ matches $f_e(k)$?

Hi all o/

@Horiatiki I think your notation is what is tripping up your understanding.

I see the "brigade of militant anti-PSQers" is hard at work, again

Speaking as an outside observer; perhaps, modifying the bounty idea by creating an anti-bounty for PSQs may help.

or a way of notifying the OP that work is required.

Also, bonus points for "explaning down-votes"

@copper.hat you can do that via comments

@LukasHeger well, it also needs some reasonable time for a response.

For the record, I very much dislike the phrase "brigade of militant anti-PSQers". Such language does little calm things down. Indeed, it seems to be intentionally inflamatory.

i am not against closing, but there often very nice questions that i think are broadly useful that get zapped because of the rush to close without 'context'.

Sorry Ted, my busy task is completed.

The phrase a "brigade of militant anti-PSQers" is a natural carry-over from the phrase a "brigade of militant anti-maskers," in my opinion; but you do make a valid point sir

When I see a new or inexperienced contributor post a question with insufficient context, I don't downvote/close-vote immediately, but post a comment first (and then give them some time to respond). I do the same if I think the question has potential. I don't demand that everyone should act like this, but for me personally this feels better than closing everything at first sight

@LukasHeger From a moderation standpoint, if you believe that a question can be improved, it is better to vote-to-close early. It is often the case that a question in need of improvement gets answered, and then subsequent edits invalidate the answer.

It doesn't actually help the asker to delay closing.

how about pro forma rubbish, would that be less inflammatory?

@copper.hat I find the term "rubbish" to be inflammatory, but less so than "militant anti-PSQ brigade".

@LukasHeger that is perfectly reasonable. that is all one could wish for.

The problem is the perception that closure is a bad thing.

It really isn't...

And if everyone behaved as @LukasHeger does, then it wouldn't be a problem.

Since everyone would be posting comments asking for improvements.

And then a chatroom would be automatically created

PSQs should get assigned chatrooms sooner, no?

For the record I'm not intentionally being inflammatory

:-)

@user726941 There is a difficulty there, in that users with less than 15 XP cannot chat. Though I believe that when a room is automatically created (due to an excess of comments), the original asker is granted permission to chat in that room.

Perhaps the "excessive limit" should be lowered

Hi All - I was doing a lot of analysis on prime gaps and found something interesting. I was wondering if I can post this on MSE? I always worry that people are eager to close questions. ps: I have written out all of this in a paper. It would be nice if my discovery is indeed true to have this published on arXiv for which I would need an endorsement. Thank you

prime gaps are likely to be met with a great deal of skepticism...

@user726941 Sure, but that's way above my paygrade.

@sku I think it would be a better idea to contact a professor from a nearby university who works in analytic number theory. Not saying it's impossible to do without that, but I think that would be easier. You can post on MSE, but it would be good if you had specific question. Just "please check my paper" isn't going to be well-received, I'd guess

Thank you.... the thing I am calling interesting can be numerically verified by anyone to the extent possible with todays computational capacity. I think the even more interesting thing is how I got there which is in the paper. If it is best to go to a professor, then ok. will do. Once again, thank you.

@XanderHenderson is that in the paygrade of the support team

i am trying to solve a math problem where the instructor drew some triangles and quadrilaterals all 'stitched together', and told me some of the angles, he left some angles empty, and asked me to work out one of such angles he labeled $\theta$. After using some basic properties of angles like angles of triangle add to 180, I ended up with some simultaneous equations, when putting these equations onto a solver it said there was no solution, how can I interpret this.

@user726941 No idea. It is the kind of thing which would be discussed on the main meta.

And, frankly, it is unlikely to happen.

Particularly in light of the recent layoffs.

Ok, thanks for the feedback

god why are there so few hours in a day

PSQ^ vote to open a new chatroom :-)

::sends invitation to shintuku::

@AlessandroCodenotti hi

Hi, is there a fast method to compute the residue at $z=i$ of $f(z)=\frac{e^{iz}}{(z^2+1)^5}$ ?

@TedShifrin If I have given $H:=\{g\in GL_3(\Bbb{R}): g_{ij}=0, i>j\}$ is it then true that $T_I(H)$ has the basis $\{e_{11}, e_{12}, e_{13}, e_{22}, e_{23}, e_{33}\}$ or am I wrong?

Sure, that's right.

perfect thanks

is there a real argument for this because this was my guess @TedShifrin

You need to learn how to find the tangent space to submanifolds defined by preimage of a regular value.

what do you mean by that? can you link a page where I can read about that?

@SineoftheTime I'd probably do a series exspansion

@ioch were these triangles on a plane?

there's always the Scottish Café

not funny though

@copper.hat Mathematicians drinking Irish coffee in the Scottish Café

Unfortunately Ireland is under represented in the mathematical world. The first time I met someone who was actually interested in discussing mathematics was when I went to graduate school at Berkeley. I am still in close contact with said person.