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10:00 PM
@mick In a Dirichlet series, the $a_n$ are constants
If they are not constant, then it is not an Dirichlet series - end of story
 
Someone have a triple facepalm pic for me please
>_<
 
@OldJohn you got a point there. but maybe a summability method might save the day ??
 
@mick nope
 
summabiity methods are not magic...
 
10:03 PM
@OldJohn how about 1/x ?
 
@skullpatrol thank you <3
Computer Scientists and programmers will one day take the last bit of nerves out of my body
Because they always try to prove mathematicians wrong
with retarded ideas and wrong conclusions
 
2001: A Space Odyssey
 
because thats how they learn stuff. Imprecise, wrong conclusions
Drives me mad everytime I have to talk to them
 
@OldJohn is 1/x possible as a dirichlet ? Or x as a0 + a1 2^x + a2 3^x + ... ?
 
@CBenni I guess that's why they call them number crunchers :-D
 
10:08 PM
Rather brain-crunchers
I am a maths student
and we have to have a second subject besides maths.
Now, for some bad Idea, I chose Computer Schience
ANd now I get into an argument about whatever they talk about. They spread wrong ideas, proofs and stuff all over the place. I have that one course I have to take and the "teacher" is a doctor of science (!) who works at uni for 15 years
I prove her wrong every single lesson and she would NEVER EVER believe me
stuff that you can just facepalm on
 
@CBenni it gets real funny when they THINK THEY CAN PROGRAM CHESS :)
 
xD
Less funny if you have to use programs written by them
 
im not a hero with programs anyway.
 
@mick That is because they conquered checkers zzzzzzzzzzz
 
why does john leave all the time :s
@skullpatrol id play them anytime
see how well they do :)
 
10:15 PM
I'm back-ish - currently trying to arrange family stuff for the weekend
 
ok x is not a0 +a1 2^x + a2 3^x + ... either ... leave me with 1/x as dirichlet.
@OldJohn Do you think 1/x can be written as dirichlet ?
 
@mick what is your aim with this dirichlet series stuff - what are you actually trying to achieve or solve?
 
@OldJohn nothing. just asking questions.
trying to write f(x) as a dirichlet.
consider it extending four and taylor or such :)
 
@mick sorry - I have no idea what "four and taylor" means
 
fourrier and taylor series ofcourse :) but nvm. I just wonder if 1/x can be expressed as a dirichlet series.
 
10:23 PM
Hmm, how do I finish my own papers if collaborators send me things? 8-(.
 
@JonasTeuwen avoid this chat ??
 
What the heck does that have to do with it.
 
@JonasTeuwen it saves you time ?
Question of the day : 1/x as dirichlet series ?
@OldJohn you busy ?
 
@mick moderately - why?
 
because i still have 2 question
@OldJohn
thanks for the talk sofar though
 
10:31 PM
Why not post your questions on the main site?
 
OK - ask - if I can't answer, someone might
 
Can 1/x be given as a dirichlet series ?
 
but if you want to know if $1/x$ can be expressed as a Dirichlet series, I would recommend spending a couple of hours trying before posting on main - and explain how far you got
@mick Have you tried?
 
@OldJohn I know a sum or product of 2 dirichlet series is also a dirichlet series ... otherwise Im quite clueless apart from your statement about x ...
I also know a derivative a dirichlet is a dirichlet ...
thats about it
 
@mick OK - might be time to read a book on them
 
10:38 PM
@OldJohn Does that imply you do not know the answer :p
 
@mick It means I don't have time to think about it at the moment
 
@OldJohn OK. Do you know a good sieve for finding the primes in the semiring nonnegative integers extended with sqrt(2) ?
 
@mick no - the only sieve I have ever looked into is the quadratic sieve for $\mathbb{Z}$
 
pitty
i need to read up on ring sieves
@OldJohn
whos still awake ?
nobody ?
 
@mick I'm still here some of the time
 
10:50 PM
Let f(x),g(x) > x for all real x and let f(f(x)) = g(x). g(x) is given. What are the conditions on g(x) such that there is a unique solution f(x) , such that the arc length between f(a) and f(b) is minimum for all a and b ??
@OldJohn
@skullpatrol
 
@mick what do you mean by arc length in this context? - what arc are we talking about?
 
integral sqrt(1 + f '(x)^2) dx
integral taken from a to b
x,a,b real
I still have problems with uniqueness alot in math ... guess its normal for a newbie ...
 
Hmm no - idea about that - even without the arc condition, you are talking about a fractional iteration, I believe, and they get pretty darned difficult.
There have been some interesting questions along those lines on MO
 
yes some by me :p
 
@mick you have posted questions on MO? - which ones?
 
11:03 PM
oh sorry no , i meant mse
I gotta run John , but thanks for the help. I appreciate it.
 
@mick link?
 
dunno look at my profile maybe
 
Hi @WillJagy
 
bye bye
bye @everyone
 
hi all
i have a problem that i've worked through half of
but can't figure out the second half
any hints would be appreciated
here it is:
Let P : C
2 → C be a polynomial in two variables x, y. Show that if P is
a linear map then P(x, y) = αx + βy + γ for some α, β, γ ∈ C. Express
α, β, γ in terms of P
 
11:10 PM
@mick Sir. You are a tosser.
 
True dat^
 
let p: c^2 -> c be a polynomial in two variables x,y. show that if p is a linear map then p(x,y) = $\alpha$x + $\beta$y + $\gamma$ for some alpha,beta,gamma in C. express alpha,beta,gamma in terms of P
so i got the whole first part, i showed what needed to be shown
but i'm not sure how to express alpha,beta,gamma in terms of P
and gamma is 0
so would gamma be p(0,0)?
and then alpha = xp(1,0)
and beta = yp(0,1)
 
@OldJohn, Howdy.
Which I think must be a contraction of How do you do?
which makes less sense than How are you or How are you feeling or Tell me about your prostate
 
@WillJagy Indeed - it must be. I think "bloody" is also supposed to be a contraction of "by our lady"
 
Did you guys ever find a satisfactory answer to the paper you were working on?
 
11:20 PM
@skullpatrol I didn't!
Oh - you mean the Cohen and Selfridge one? - Yes - all perfectly cleared up!
 
Yes that's the one.
 
We got a good answer from Pomerance about the Cohen and Selfridge thing. Nothing from Baez about the octonion thing, which was a bit open ended anyway
 
Will very kindly asked Pomerance - who knew the missing steps
Will moves in more elevated circles than I do :)
 
Oh: evidently Zounds is supposed to be God's Wounds as in the nails of the cross, hence rhymes with wounds.
I do know lots of powerful people, it is just that most do not reply to my email, so it is a hollow sort of honor. Or, from a book by Ernest Bramah:
One humble friend in the same village is worth two influential uncles in the palace of the Emperor.
3
 
11:24 PM
@WillJagy I like that one
 
Or, equivalently:
A hand in the bush is worth two birds.
 
@WillJagy ROFL!!!
 
That one works better in England than the US.
 
@WillJagy indeed
 
Why does it not work as well in the US?
 
11:28 PM
In England there is an existing slang usage or "birds" for "girls," used for at least decades. Not in the US. no real reason for it either way, slang just happens.
 
...and "bush" has its own connotation :)
 
Well, there you go.
There seems to be a mechanism where people can assign a star to a comment in chat. I have two new ones, the Emperor thing and the bird item. I even got a badge at one point, X comments in chat with at least Y stars each. The badge was called Outspoken I think. Although Entertaining Or At Least Trying To Be would have hit closer to the mark.
Right, X=10 and Y=10
 
@WillJagy Yeah - I find the badge system rather amusing - but also a bit condescending
 
@OldJohn, I think it would work if only yhe badges better reflected the full experience of the site. So, for example, if they had an Asshole badge as a bronze, then a silver version and a gold version for the honest to god assfuck, that would be informative.
 
@WillJagy Maybe we should propose it on meta?
 
11:41 PM
@OldJohn, sounds good. I think a bronze one for Asperger's too. Informal diagnosis of course.
 
Backstabber badge.
 
definitely
Too tired to think clearly - goodnight all
 
The odd thing is that I wound up emailing a guy with fairly serious asperger's, over some MO stuff that sometimes appears on MSE. It was pretty nice. So my feeling is that the compulsion to post useless crap is a condition distinct from autism or asperger's.
@OldJohn, good night.
 
@WillJagy g'night - no need for waterfalls here :)
 
@WillJagy Maybe that is syndrome of mongole?
 
11:50 PM
John is referring to my "white noise machine" which has been very helpful. @Jonas, I don't know. I just think in terms of one being an inability to fully process incoming information, as in social cues or criticism, and the compulsion being to spray stuff outwards, consistent with exhibitionism except that maybe the people watching do not really matter.
 
Alright.
What is it when you do know they are not interested, but you just are not giving a single fuck that day?
 
Dunno. Sometimes I will put comments, then erase them in an hour when I am less pissed off.
 
With me the less pissed off only comes days later.
 
Hi all. I have a simple algebra question
 
Giving me a quite eccentric appearance, so it seems.
@AlanH We only do hard ones here, sorry! Bye!
 
11:55 PM
@JonasTeuwen Oh, I see
 
@JonasTeuwen, right, and not necessarily in your control, although you must know that there is some societal penalty for seeming too peculiar. How is the manuscript coming?
 
@WillJagy Worked on a manuscript together with a Finnish guy.
The other one is OK.
But I seem to have gained some extra time anyway.
 
Alright.
 
If $x$ is divisible by $a_1,\hdots, a_k$, then $x$ is divisible by the lcm of $a_1,\ldots,a_k$, right?
 

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