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12:00 AM
@vzn No offense to heather, but what would we actually ask her?
 
^
(curious myself)
 
yeah good point 0celo
what did you do at school today
 
we could ask her about her opinion on death metal
 
yeah but who cares
@heather what is your opinion on neural networks?
 
@BalarkaSen um...i don't have one?
 
12:02 AM
i dunno man, probably the one who'd ask that
 
Talk about life.
 
@Kenshin Integration of functions with compact support in measure theory, test in circuits, test in waves/optics, Borsuk-Ulam in topology, boundary work in thermo
 
some peeps don't like talking about life it makes them feel weird
not me, but maybe heather woijn't like answering questions about life
 
@0celo7 Borsuk-Ulam is dope
 
vzn
@0celo7 (sigh!) nice questions! did you see my list? (someone took the pool table) :(
 
12:03 AM
@0celo7 keep up the good work
 
@Kenshin it's an interesting idea, certainly...raises questions about the line between life and computers. honestly, i haven't read much about it, so i couldn't say much beyond that.
 
@heather yeah I'm just starting to learn them too. I've created a simple one in python. Very interesting stuff
 
@BalarkaSen How would I compute the Hausdorff dimension of the Cantor set?
 
@Kenshin, yeah, I really need to read more about them/deep learning/etc
 
@0celo7 No idea. It's log(2)/log(3) or something stupid like that ain't it
 
12:05 AM
Yeah
It's an exercise in my GMT book
 
I haven't dealt with Hausdorff dimensions much.
 
Hausdorff dimensions have use in finance too
 
@BalarkaSen Ah, the proof is in one of my measure theory books
 
one can adjust the cantor set and produce a set with dimension $\delta \ln(2)/ln(3)$.
 
12:07 AM
@0celo7 Can there be a plane Jordan curve with positive Lebesgue measure?
 
@BalarkaSen I'm 99% sure the answer is yes.
I'm certain a.e.
 
well, exercise is to find one
not via googling
 
Since when are you a measure theorist
Does the usual space-filling curve work?
 
@vzn, I'd be willing to do it, but I'm not sure there'll be much interest. I really don't know that much about physics.
 
space-filling guys aren't Jordan!
self intersects like hell
 
vzn
12:09 AM
@heather gotta run soon plz hit me with any Qs. anyway Physics site enthusiasm is turning into over ½ the qualification for speakers & youre defn qualified on that :)
 
true
 
@vzn, well, I'd be willing to do it...when you have time, let me know what I need to do.
 
so that's why it's kinda slightly surprising. also the reason jordan curve theorem is nontrivial topologically
 
@vzn I'll do it too mate
 
@BalarkaSen I don't know an example off the top of my head
 
vzn
12:11 AM
@heather ah, our other big challenge, self deprecating speakers. you can run it the way you like, it doesnt even have to be on physics. you can talk about anything you want to. think there will be significant attendance. the only tricky thing is when! the regular chat session is tuesday mornings, but presumably you are in school then? can you give me some idea eves or wknds works for you better?
 
@BalarkaSen Did you come up with that yourself?
 
vzn
@Kenshin youd be interested as guest speaker? serious?
 
yeah why not
 
Nah
 
12:11 AM
@BalarkaSen Did you know Lebesgue came up with his integral for this PhD thesis?
He wanted to take limits of integrands and the results were not integrable, so he reinvented the integral
 
@vzn Well, it needn't be on physics, but considering it's happening in the chat room of a physics site and gets advertized and planned on its meta I think we should aim to have speakers offering something of interest to physicsts/physics enthusiasts.
 
Ahh, no I wasn't aware.
 
He was trying to solve the Plateau problem
 
@vzn I will talk about the applications of physics to finance
 
@vzn not completely sure, but monday/wednesday/friday evenings, depends, and mornings of weekends. i'd be able to give a more specific day/time when you have an idea of what week you want to do it.
 
12:13 AM
@BalarkaSen In calculus of variations you want to minimize certain functionals. He found that his minima were not Riemann integrable
 
ex i have something coming up on a friday night, that wouldn't work if you wanted to hold it that week.
 
I had to google that but yeah, I see what you mean
 
vzn
@ACuriousMind hi there! you always pop in with remarkable timing... agreed it ideally focuses on physics but "AMA" means anything
 
(his functional was a fancy Riemann integral)
 
for the record, i'd be willing to discuss physics, how to learn it, whatever, but i'm just warning you that i'm not very good at it =)
 
12:14 AM
He also apparently found the necessary and sufficient conditions for a function to be Riemann integrable.
 
Cool story
Well, gotta run now
see ya
 
bye
 
I'd like to propose that the AMA doens't necessary have to focus on physics
 
but anything that could be of itnerest to people interested in physics
 
12:15 AM
@vzn (I tend to lurk :P) Yes, that's why I said it needn't be on physics - I know how AMAs work. I'm just saying I think it should be attractive to at least a subset of physicists/physics.SE users.
 
vzn
@heather eves or wknds should be fine. just wondering do you have any school vacs coming up? tues morning is ideal. we tend to have a lot of advance notice (weeks at least)
 
@Kenshin Definitely not.
@heather did you post a question pool meta yet?
 
eh...tuesday mornings are pretty much a general no-go...next school vacation is in like a month
 
Or decide on a format?
 
@DanielSank nope, i have no idea what i'm doing =P
 
12:15 AM
@heather skip school
 
@heather You can do it however you want.
 
@DanielSank when are you going to announce the awards
 
i think a free for all might be nice.
 
for the top posts of 2016
 
so @heather is going to do an AMA?
 
12:16 AM
@0celo7 hehe nope. parents would kill me
 
For mine, I had people post questions ahead of time and then went through them during the AMA.
 
How are you going to prevent trolls from derailing it?
 
vzn
@ACuriousMind am all for trying to be "attractive" but nobody else is pushing much on the prj, so lacking other energy, uh, hope others will not be critical of what materializes either
 
I don't think that format was too great though.
 
also @DanielSank I assume negative votes don't count to the vote tally (only positive votes count?)
 
12:16 AM
@0celo7 that's what it's looking like.
 
@0celo7 What kind of question is that?
 
The other thing we did was we had a side chat room for people to talk about what questions to post in the main AMA chat room (which was hbar).
That was useful.
 
@DanielSank Yes, that was a great idea
 
@Kenshin When I'm at home and remember.
 
@DanielSank i saw; i liked it but i'd rather a fully in hbar discussion. a general meta post for topics that people want to discuss might be good though.
 
12:17 AM
@ACuriousMind Yeah, the staging room was good, but I wish I hadn't just sat there and answered prearranged questions to much. The AMA lacked some dynamic nature...
 
vzn
@0celo7 lol mods will be around, mr troublemaker / std chat rules apply :P
 
@ACuriousMind seems like a reasonable one
 
@heather It did help me think about some stuff ahead of time.
 
rob
@vzn Nope, no mods here. Troublemake away.
 
But yeah, a more dynamic conversation would be nice.
 
12:18 AM
@DanielSank right, yeah.
 
@0celo7 Did something about the last AMAs give you the impression we are not prepared to deal with trolls?
 
The one problem was that even with the way I did it, it was still hard not to get distracted by so many questions asked all at once!
 
Or do you for some reason expect increased trollery (is that a word?) in heather's case?
 
vzn
@DanielSank not a huge fan of the side chat room idea, think it was ok for DS but few would be able to multitask that way, works better for high profile guests with large audience etc
 
So, I'll propose a compromise, ask someone to be a moderator who sort of controls the flow a bit.
 
12:18 AM
that's why i'm trying to think of a way to find a mix of sorts (like topic meta post and then a free for all in chat, touching on the topics people put in the meta post).
 
If the main chat room gets too crowded, the moderator can maybe push stuff into the side room.
 
@DanielSank now that sounds like a good idea.
 
Could work.
 
May I ask why heather is doing the AMA?
 
^ She was invited.
 
12:19 AM
@Kenshin because I was asked by vzn =)
 
vzn
@DanielSank will interview heather myself if nobody else has questions on topics mentioned earlier. if anyone else wants to volunteer as moderator (for her talk) feel free
 
Yes, but do we have any others?
or has everyone else declined?
and heather is the last resort?
 
@heather I have stuff I'd like to ask so I'm looking forward to seeing a meta post.
@Kenshin wtf
 
@Kenshin ouch
 
I'd really enjoy an AMA from Heather!
3
 
12:20 AM
=P
 
just curious guys
 
vzn
@DanielSank that has rarely been an issue & also if heather picks an unusual time other than tues mtg, think attendance will not be high
 
I'd enjoy a personal AMA
 
Curious and being a jerk.
 
but we know heather doesn't work in physics
 
12:20 AM
yup, i work in middle-school nerdery
 
@Kenshin Most of the people here don't work in physics.
 
is that a word?
 
is it being a jerk to wonder why we are choosing a school kid for the physics AMA?
 
Most of the users are students, just like heather.
 
@Kenshin yuggib and Secret didn't either.
 
12:21 AM
@Kenshin The way you referred to her as a "last resort" was not particularly kind, no.
 
@DanielSank college students vs middle school student, though
 
@heather So what?
 
sorry for any offense @heather not my intention
 
vzn
@Kenshin heather has 4.5K physics rep. no complaining about guests when none others are available. your volunteering has been noted & will discuss it with you further if youre serious
 
anyway.
 
12:21 AM
@vzn yes I'm keen to volunteer too
 
Anywhoo, I did get Jess Reidel to agree to doing an AMA, but I just never actually arranged it.
@Kenshin And what makes you so special? ;-)
 
@DanielSank nothing
 
vzn
@DanielSank yeah havent forgotten/ am defn really looking fwd to it, any time is fine
 
but I'm happy to do it as last resort
 
12:22 AM
well
 
lol
 
you'll find out what's special about me in the AMA
 
@DanielSank, well, in a nutshell, however best you think to set it up, I don't mind.
brb
 
@heather I can mod your AMA if you want and if I'm available at the time.
gtg. Back later. You have my email.
 
12:23 AM
@Kenshin This is not a "last resort" kind of situation. There's no fixed schedule for the AMAs and if we don't have a speaker, then there'll be no AMA. We aren't under pressure from anyone to come up with speakers.
 
or just use hbar
 
@ACuriousMind I understand but I still wish to nominate myself
if the application of physics to finance is a valid topic
if that's too far from physics to be suitable then I won't do ti
 
vzn
@Kenshin noted! thank you for your interest! there is plenty of room for everyone. am interested in physics-finance research myself over many yrs
 
@Kenshin Are you in quantitative finance or something? I've never heard you speak about that topic before
 
yeah I have spoken about it before
 
vzn
12:26 AM
@Kenshin wondering when you started visiting Physics chat?
 
@vzn I"m trainined in physics
but work in finance
 
vzn
@Kenshin undergrad physics degree? mind saying what school? at least what country? yes KK regular is very similar in that he is now working in finance
 
Australia
yeah undegrad degree in physics
 
vzn
@Kenshin what year graduated? how long working? youre new to the physics chat room arent you? (welcome) ... ps have looked into fractals in finance quite a bit myself
 
no I've been here for years lol
@vzn my previous user name was "mew" so perhaps you know me from that?
i changed a few months ago
 
vzn
12:29 AM
@Kenshin uh ok maybe have seen you around some
 
yeah I've been working about 3 years
what country u from vzn?
 
vzn
cool what kind of job? am basically ok with you going as guest at some point, dont see any problem with it
@Kenshin US
 
let's save the rest of the questions for the AMA
 
vzn
ok we have done about 4 sessions, have you seen the meta post on that? take a look, maybe browse prior sessions some etc, they are scheduled far out, eg ~1mo in advance or so with the guest
 
yeah i'll take a look
 
vzn
12:32 AM
this is the current list of speakers & might answer some of your questions about scheduling etc plz +1 :P meta.physics.stackexchange.com/questions/9068/…
 
dream guests
wow
maybe this AMA is out of my league
I choose Stephen Hawking
 
vzn
@Kenshin lol, its strange how many people asked have that reaction, not sure best way how to deal with it right now... :|
 
lol yeah. i'll still do it though, if a celebrity does it later it'd be cool to say I was in the same league as them lol
time for me to seize the dya laterz all
 
vzn
@Kenshin DS is big league & did it hes from google/ QM computing dept :P ... gotta go
 
okay back
@vzn
so Daniel's offered to moderate
 
vzn
12:38 AM
@heather plz hit me with any Qs, will try to answer, gotta go soon
@heather that works fine/ great!
 
okay, let me know what you think:
post a meta post to collect questions
have Daniel moderate and have it be a free for all but focusing of course on the meta questions.
 
@Kenshin I imagine the dya is a strange and fearsome Australian animal? ;)
 
lol
 
vzn
@heather yeah look at the others meta posts. the way we have done it is pick a date 1st and the guest announces it in their meta post. if youre really hot to do this, you could write the meta post 1st without the date, but honestly it would probably go better if you have the date 1st.
@heather its up to you how to structure it/ format. if you want to avoid questions outside of the meta ones thats fine but do encourage you to embrace the spontaneity of the chat room (a natural asset) as much as possible
 
@vzn no, i want it to be a free for all, just w/ the meta questions to help have a general idea of what people want to know.
and Daniel can help moderate.
 
vzn
12:41 AM
@heather exactly!
 
right.
so what's the general range of dates you had in mind?
next week, next month, summer...?
 
vzn
@heather think it all over, it takes awhile to organize, plenty of time.
 
i just want to have a general idea of timeframe so i can help pick a date.
 
vzn
@heather if you dont want to do it tues morning in a few weeks, you can pick another time. we havent had one on wknds yet, not sure what the best time would be. lets say roughly "next few weeks"
 
okay
next few weeks...
hmm.
 
12:42 AM
got deleted way too fast :-(
 
^lol
 
@AccidentalFourierTransform dat anonymization :P
 
@vzn let me check one date
 
vzn
@heather think need to announce it at least 1 week before session, maybe 2 wks is better. but more than that not nec.
 
(you forgot the "deleted by" tagline :P)
 
12:43 AM
okay
 
vzn
@heather yeah dont feel rushed we will have to continue the discussion. plz just check regularly & will do it also & we'll push it fwd. talk it over with your parents too if you like. & may be a way to get your dad or other friends online by then also to participate etc.
 
@ACuriousMind wow
I should go sleep now
 
@ACuriousMind Just checking!
 
how does sunday morning the 26th sound?
is that an at all busy time?
or would a monday night work better?
 
I dunno, weekends on SE tend to be kinda slow in my impression
 
12:45 AM
because monday night the 20th would work too
@ACuriousMind, okay, then how about monday night?
 
What's that in UTC?
 
What are y'all scheduling?
 
vzn
@heather really cant say myself if wknds or wknights are better, can prob do either myself
 
Only use UTC people
 
vzn
@BernardoMeurer heathers AMA, shes got a lot of enthusiasm/ energy/ jazzed already!
 
12:46 AM
let me use the google to get it in UTC
 
what is UTC?
 
10pm utc (4pm cst) to 11pm utc (5pm cst)
on monday night the 20th
does that sound alright?
that'd be 40 min ish after i get home from school, should be enough time to do any homework and have 1 1/2 hrs of uninterrupted time
 
@heather yeah the meta is useful as a guide
 
vzn
@heather think if you do it during US "prime time," ideally earlier, better. ie early eve in some US time zone
 
12:47 AM
Monday night is probably better, although the Europeans will be asleep.
 
@vzn well, i get home at 9:30pm utc generally, so there's a limit to how early i can go.
@DanielSank thanks again for offering to moderate.
@DanielSank is wednesday night any different?
 
vzn
@heather suggest early/ mid eve in your timezone
 
@vzn 4pm to 5pm is early evening
(cst)
 
vzn
@heather to me 4p/5p are late afternoon, its acceptable
 
oh.
okay.
 
12:50 AM
@heather I doubt it.
@heather sure.
 
vzn
@heather ok gotta run many thx for your energy, we will continue to talk, DS/ other mods can handle a lot of it too etc see ya around
 
so...monday the 20th, 10pm to 11pm utc (4pm to 5pm cst). does that make sense @vzn?
@vzn okay have a good day.
 
Guess I'll start composing a meta post. (won't post it yet until i confirm the date with vzn/others)
 
Thanks again for trying to keep the AMA alive @vzn
 
12:56 AM
ciao people
 
@AccidentalFourierTransform have a good night
 
 
1 hour later…
vzn
2:09 AM
@Sᴋᴜʟʟᴘᴇᴛʀᴏʟ yw its fun :)
@heather date is fine with me heather! plz post at least 1 wk before that date, thx! see other meta post intros for examples. thx much/ again for your participation!
 
0
Q: February 20th Ask Me Anything with heather: Question Pool

heatherI'm heather. I've been invited to be a guest for the Physics.SE Ask Me Anything (AMA) taking place in the h-bar on Monday, February 20th, at 10pm UTC (for USA users that's 2:00 Pacific, 3:00 Mountain, 4:00 Central, and 5:00 Eastern). I'm excited to talk about just about anything, from teaching yo...

how's that look?
(was writing while waiting for date confirmation)
 
https://qz.com/566050/people-who-like-pseudo-profound-quotes-are-not-so-smart-says-science/?utm_source=qzfb
Some of these sound make sense because I have came across too many weird things, others don't because it is too localised and even wrong
 
2:34 AM
1
Q: February 20th Ask Me Anything with heather: Question Pool

heatherI'm heather. I've been invited to be a guest for the Physics.SE Ask Me Anything (AMA) taking place in the h-bar on Monday, February 20th, at 10pm UTC (for USA users that's 2:00 Pacific, 3:00 Mountain, 4:00 Central, and 5:00 Eastern). I'm excited to talk about just about anything, from teaching yo...

 
vzn
@heather looks great, nice job! :) another item occurred to me. we have a chat guest speaker community ad from last year, cooked up a simple one. there was a lot of feedback at the time about improving it. noticed you have great photoshop talents/ skills wrt Space Exploration ad. any interest in revising it? anyone else? no big deal if not, will just reuse last years. meta.physics.stackexchange.com/questions/7426/…
 
@vzn I'd be willing to revise it, though I don't know how much better I can make it. Let me see what i can do =)
 
vzn
@heather one quibble, its the MartiniS lab, & they probably dont serve drinks there :P
 
oh geesh
let me fix that =P
 
vzn
@heather also think "failing" at collatz is something even many of top worlds mathematicians could/ can admit to! :o
 
2:39 AM
@vzn i meant failing at problems/puzzles in general
obviously failing at collatz is the norm (so to speak) =P
 
I once tried with navier stoke's problem but then fail miscerably because I got a whole bunch of crazy integrals that leads to nowhere. What's even more interesting is that the reason I tried that problem is because I want to visualise navier stoke's equation in its full glory
 
vzn
@Secret lol. hey maybe youd like to share any (successful!) speaker tips w heather while youre both around, cybersynchronicity :)
 
ah, yes, that would be appreciated =)
 
Well for me, I pretty much just go with the flow. It is highly possible my AMA post is way too long and weird that actually no one ask any actual questions. This result in the AMA to be mainly guided by the honours experience topic. It turned out really good, thanks to the presentation skills taught by my research group, and I do felt like despite being an honours student at that time, I am actually some kind of professional making a seminar
and I am SO GLAD I can answer that highly technical question of Johnrennie's, I thought I will screw that up
 
vzn
@Secret appreciate all the effort on the meta post, think it is not just for the session itself but also for history etc :)
 
2:49 AM
my AMA post isn't great, but I hope it gets the point across =)
 
@vzn And actually, had not every edit will bump the post to the front page, my meta post will actually be constantly updated, cause it does serves very well for me to review my interests and academic goals thoughout my life, like a notepad
You know how I am a cybersquirrel burying acorns wherever I go
 
@Secret what?
 
vzn
@Secret ah, actually dont recommend that, the mods might not like that
 
@vzn That is why it stayed as it is
@0celo7 I have a tendency to use any media on the internet that has some kind of history or archive function, as a time capsule for my ideas, besides my offline computer
In particular, a lot of the chat messages I do actually constantly revisit them when building new ideas
 
vzn
@Secret you have big cyber footprint :)
 
2:54 AM
ack, gtg, good night all
 
@vzn I do, and I have a mother docx and my facebook to track them all
 
vzn
@Secret you applied for phd program right? hows that going? were you accepted? ps am reading some cool dream books lately...
 
Chance to make the big books and win loads of internet bounty points:
5
Q: Residue Proof of Fourier's Theorem Dirichlet Conditions

bolbteppaWhittaker gives two proofs of Fourier's theorem, assuming Dirichlet's conditions. One proof is Dirichlet's proof, which involves directly summing the partial sums, is found in many books. The other proof is an absolutely stunning proof of Fourier's theorem in terms of residues, treating the parti...

 
Recently, most of them are being slowly transferred back to my offline computer as some websites will suddenly pop out of existence

PhD is good, it will start on 1 March, my supervisors have helped me signed into the computing facility. When PhD starts, I think I will be going into full chemistry mode unless somehow outside the conferences and research times, there is still time to squeeze in topology (which after 2 months of some set theory, finally reached Ch. 2 of Munkres)
 
How is it that iodine readily sublimates at room temperature despite having a liquid phase?
 
3:01 AM
because it is at the wrong pressure in the phase diagram?
 
no, it has a liquid phase at atmospheric pressure
 
another possibility is the liquid phase range is too narrow
 
no, the range is from 113.7 °C to 184.3 °C
 
vzn
@Secret congrats! :)
 
I'm thinking that evaporation at room temperature doesn't take place in atmospheric pressure since there's something called "vapour pressure", but I might be conflating two irrelevant concepts
 
3:05 AM
As it turns out, that "sublimation of iodine" is actually evaporation. That's new to me
so yes, you are right iodine does melt
 
I thought solids do not evaporate, so I learnt something new today
 
yeah I agree it is a relatively unknown concept
 
NB Regarding questions: There are questions that I don't know what the question is but had some idea what the answer I am looking for (except it too, cannot be precisely written down). When that happens, usually my question on that will take the form of a statement or even just a keyword
 
Does this mean the table I'm on is evaporating? (Of course not, the molecules on the table are too big. I guess the everyday objects we deal with are all macromolecules...)
 
There's a nonzero but vanishing small probability that one of the your table molecules have received enough energy to go into the air
 
3:18 AM
What about salt? I guess the ionic bonds are harder to overcome
 
probably harder I guess, though gaseous phase ions are a valid thing
 
Gaseous phase ions are usually produced in vacuum right? We're dealing with the everyday environment
 
that is true, but high up in the atmosphere, radicals and ions are constantly produced by the action of sunlight, though they usually tend to collide with something else and stuck to it rather than stay free for long periods of time
The reason they survive longer in vacuum is because there is almost nothing for it to collide and be captured/react
 
I see
:o the inventor of mhchem is on SE and knows little about chemistry
and mhchem is older than chem.SE
 
4:01 AM
Last night dream: Some seminars, including one on exoplanets, replacement spinal cord, radiation and radioactive gaming, and 5 others. There's also a billboard which shows maths functions. One of these is called the colorless function:
$$\operatorname*{\huge{無}}\limits_{n=0}^{\sim}\Large{色}_{色_0}$$
 
4:18 AM
0
Q: Is the splitting of worlds in MWI observer dependent?

2117Is the splitting in MWI observer dependent? What's the basis for the splitting according to many worlds? If the splitting is observer dependent, does that mean it's not Lorentz invariant?

But interpretations does not change the physics
 
4:50 AM
mornin
 
HEllo
 

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