The h Bar

The following:

Balarka Sen

i read a book i forgot it's name

> The good Christian should beware of mathematicians and all those who make empty prophecies. The danger already exists that mathematicians have made a covenant with the devil to darken the spirit and confine man in the bonds of Hell. (St. Augustine)

Reads:

Hey @0celo7

> The good Charlartan should beware of mathematicians and all those who make empty prophecies. The danger already exists that mathematicians have made a covenant with the devil to darken the spirit and confine man in the bonds of Hell. (not St. Augustine)

as for why, I have no idea

1:21 PM

@0celo7 first-order relativity is the worst thing

@Slereah hi

what's that

Special relativity done via first order logic

$$\forall \ell_1, \ell_2 \in G \ . \ (\forall p \in {}^nF \ . \ p E \ell_1 \Leftrightarrow p E \ell_2) \Rightarrow \ell_1 = \ell_2$$

E?

$p E \ell$ means that the set of coordinates $p$ belongs to the line $\ell$

This means that if two lines have all the points with the same coordinates, then they are the same lines

Balarka Sen

@Slereah wai tho

wai

thats my response

1:31 PM

there are many axioms

Oh man

The theorem for the twin paradox

hmm... I guess I will need to know what the lines represent to understand why the above statement is important

\begin{eqnarray}
&&(\forall m \in \text{Obs} \cap \text{Ib} \ . \ \forall k \in \text{Obs} \setminus \text{Ib} \ . \ \forall p, q, p', q' \in {}^4F \ . \\
&& (m, k \in q_m(p) \cap w_m(q) \wedge w_m(p) = w_k(p') \wedge w_m(q) = w_k(q'))) \Rightarrow |p_t - q_t| > |p'_t - q'_t|\end{eqnarray}

...what happens to the spacetime if $\ell_1 = \ell_2$ fails...

If $m$ is an inertial observer and $k$ is a non-inertial observer such that they intersect at two points, then the proper time of the inertial observer is superior to the proper time of the non-inertial observer

$w_m(p)$ is the coordinates of the event $p$ as seen by $m$

There's the big axiom relativity

$$\forall m \in \text{Obs} \ . \ \forall ph \in \text{Ph} \ . \ v_m(ph) = 1$$

Every observers see light at the same speed

so, guys

can someone explain how the hell this happened?

2

and/or put that question out of its misery

1:47 PM

Guys can any1 help me with a physics exercise?

i asked help from friends but they stuck too

wanna go to a room and solve it?

i really need to understand it

"Let $h \in \text{Ib}$ be an inertial body with $v_m(h) \neq \infty$. Then $tr_m(h) : F \to {}^{n-1} F$ is a function everywhere defined on $F$, where we think of $F$ as the time axis $\bar t$ and of ${}^{n-1}F$ as space."

pretty interesting paper if a bit harrowing

Although now I can't wait to answer a SR question on PSE as the worst possible answer

entirely in first order logic

$$\forall m,k \in \text{Obs}\ . \ \forall ph \in \text{Ph} \ . \ tr_m(k) \neq tr_m(ph)$$

No observer can travel with a photon

2:23 PM

web.archive.org/web/20061002120004/http://www.math-inst.hu/pub/…

the chapter on Gödel incompleteness is empty

what a gyp

Ah, found the completed version

Special relativity isn't decidable

Sad!

Oh wait

Some axiomatizations are complete apparently?

2:39 PM

$\Phi$

$\Phi$ is the theory of real closed fields

Since special relativity uses $\Bbb R$ a lot

web.archive.org/web/20061002124405/http://www.math-inst.hu/pub/…

Model of special relativity in 2D with FTL observers

3:05 PM

"Let $n \geq 3$. Then $(1)-(3)$ below hold
(1) $$\text{Basax}(n) \vdash (\forall m, k \in \text{Obs}) v_m(k) < 1$$
(2)$$\text{Basax}(2) \cancel{\vdash} (\forall m, k \in \text{Obs}) v_m(k) < 1$$
(3) Assume $\mathfrak F$ is an arbitrary ordered field, then $$\text{Mod}_{\mathfrak F}(\text{Basax}(2) ) \cancel{\vdash} (\forall m, k \in \text{Obs}) v_m(k) < 1 $$

3:17 PM

@dmckee Tbh some of my friends say I should be enjoying my youth, not wasting it locked up reading.

3:29 PM

Oh man there's a section called "cartoon models"

I bet these will be the most hilarious first-order logic models of special relativity

A: Are certain fields of physics axiomatized?

4:24 PM

1

Many fields of physics are axiomatized, either completely or to some extent. Special relativity has quite a variety of axiom system, either based on the fairly straightforward theory of Lorentz vector spaces, or through awful first-order axiom systems such as $\text{Basax}$, $\text{Reich}$ or v...

Quite the lucky break

I read about it and someone asks on the same day!

Lozansky

5:01 PM

What does the wave equation look like for a membrane hit by an impulse?

5:18 PM

Good news, everybody: my official job title is now "Research Scientist" instead of "Hardware Engineer". Does that mean I can be re-admitted into the science club?

5

@DanielSank Yes, your membership card will be sent to you after you have paid the processing fee of $1000

@ACuriousMind Oh come on, man. That's an obvious scam. Scientists don't have $1000.

You should be ashamed.

Considering the fees some Journals take e.g. for coloured images, it would appear many scientists are quite able to cough up $1000 if pressed ;P

@ACuriousMind Their departments are. Are you saying I can expense this?

@DanielSank Well, if they give you the title they must be willing to pay for it!

5:31 PM

Hahahaha, ok

I'll write that on the expense report: Business justification: The German guy on the internet said it was ok

I'm not liable for you finding yourself as a hardware engineer again after that ;)

Anonymous

@DanielSank Congrats! So, does that imply that your tasks have increased/changed now ?

Anonymous

For the note, quantum hardware electronics engineer sounds way cooler than research scientist (...which is meh) :P

Hi to all. Do you believe that under a first study/reading of a theoretical subject, one should give a big focus on proofs of theorems? I am currently reading "Topology and Geometry for Physicist" by C.Nash and S.Sen, and although my university years were mathematically-light( we did not have topology,diff.geometry or group theory) I seem to be getting along fine up to now( second chapter, stage bout triangulation and a calculation theorem for the fundamental group).
Do you think one should focus much on all the proofs or at some, or leave them if he gets to a first understanding of the sub…

@Blue Nope.

@Blue Ah, yes well I get both. I am on the "research scientist" job track, but my role (or whatever) is still Quantum Hardware Engineer. We can write whatever we want as our role ;-)

There's a guy in the company whose role is "Captain of Moonshots".

Anonymous

5:40 PM

@ConstantineBlack Whichever suits you best I guess. That said Nash Sen is a good book, but I got stuck quite a few times in the initial 2-3 chapters

Anonymous

@DanielSank Hehe, that's cool

@ConstantineBlack I think that you often need to understand the idea of proofs, but not necessarily care for the gritty details. Some things are fine as black boxes, but you should strive not to have all too many cases where you don't know/understand the proof at all

Anonymous

@DanielSank Uh, is that some inner joke?

Should I be able to reproduce the proof after studying it?

@DanielSank ::chuckles:: The place my father worked for most of his career had a single job description that went by two titles—"Research Scientist" or "Research Engineer"—depending on what your sheepskin said.

The job postings actually have titles like "Junior research scientist or engineer".

5:44 PM

@ConstantineBlack I usually aim to be able to explain the proof to someone after briefly looking it up, not to be able to reproduce it, but I think that's a question of what suits you better - it certainly can't hurt to be able to reproduce it

@Blue Indeed, so far Nash has been pretty nice- but I'm just at the beginning.
@ACuriousMind Of course not :) Thanks guys.

Anonymous

If you're studying for an exam you have to be able to reproduce the proofs though :P

Anonymous

After that you are free to forget it...although you never really do

No... I don't think there are more than three or four professors in the faculty who know about these stuff- not that I mean they' re awfully hard, there are just too few theoretically-inclined physicists here. But I get you. On the other hand, I think that studying without any formality and rigorousness at all, does leave a phantom scar :).

@dmckee Oh, actually yes, look at that: my title is "Research Engineeer".

What does that even mean?

Anonymous

5:55 PM

I sometimes wish sites like EdX and Coursera started math and physics courses too. It really would help people who aren't able to take certain courses formally in university. They're doing great in the CS area.

Agreed. But I think that in the industry and around the hole marketing business, theoretical sciences are considered non-profitable, at least in comparison with the need for, let's say, engineers... :):):)

Anonymous

@ConstantineBlack I would buy that argument if they were not running courses like this. :)

Well, it's a bit of a pop culture I think... is it for free?

Nice... And it comes as a surprise: it does not give certification.

Anonymous

I was looking at the wrong page

Anonymous

Yeah, it does not give certification

vzn

6:11 PM

@DanielSank lol that youre asking us o_O

Could a good chemist answer me?

Anonymous

@Curio This isn't Chemistry SE

I know but here there are smart people who know chemistry too

@Curio Just ask your question; if someone wants to answer it, they will.

The question is quite simple

Consider the geometry of H2CO3. Do I have to consider O and H together? I mean, 3 O are bounded to C and 2 H are bounded to 2 different O. When I write the vsepr, should I consider C and 3 O and then O and H or put together O and H?

6:28 PM

@EmilioPisanty How the hell what happened? If you are referring to the Community user bumping that question every month, then the answer is simply that one criterion for bumping is that the question has been inactive for at least 30 days and that we apparently have few enough unanswered questions elegible for bumping that it was pretty much directly bumped as soon as it become elegible again.

sophiabreggia.blogspot.it/2011/03/blog-post_9281.html?m=1 Ok, it's a AX3 molecule, but when do I have to put together Oxygen and Hydrogen like in this molecule?

So now the site deleted my answer to this question. physics.stackexchange.com/questions/388812/…

Annoying.

Anonymous

@Pieter That was a hw question..

@Pieter That was not "the site", but a diamond moderator because it has long been our policy to delete explicit answers to homework-like questions.

@Blue I had already given the guy a hard time in comments. It is stupid to delete answers when the question remains

Well, maybe I will leave the site with this kind of moderation.

rob

6:35 PM

@Pieter No hard feelings intended.

Anonymous

@Pieter Closed downvoted questions on hold get deleted automatically after some period of time. So it doesn't really "remain"

@Blue They are still on the page, still require attention.

Anonymous

Just answer anything else other than hw questions

What is a homework question? Most stuff here seems to be homework. Aside from all the crackpots with grand unified theories

Anonymous

@Pieter The mods are just following the rules set by the community though. I know it can be frustrating to have your answer deleted which you put effort into writing.

6:38 PM

I think many more questions should be deleted

Much sooner

Why wait for 5 ?

Anonymous

You can always downvote questions which you don't like

Anonymous

Or vote to close if it fits the criteria

Anonymous

@Pieter physics.stackexchange.com/tags/homework-and-exercises/info

The effort it takes for 5 people to vote to close... But the diamond guys could just remove them with a single button push. Why don't they?

Anonymous

@Pieter Because moderators aren't supposed to interfere in a community moderated site until absolutely necessary. I'm sure @ACuriousMind or @rob can explain it better to you...

6:42 PM

@ACuriousMind that a question that's that bad managed to get bumped twelve-ish times without accumulating an answer upvote, a decent answer, or a(nother) question downvote

@Pieter Because we place value on community moderation - that is we want several eyes to have looked at a question before declaring it off-topic instead of placing all of the responsibility in the hands of a select few.

And believe me, if I started closing everything I think should be closed single-handedly, meta would overflow with accusations of me abusing my power :P

@EmilioPisanty Well...when I see a question mentioning "quantum eraser", I usually run in the opposite direction without reading further :P

@ACuriousMind ah, yes, I forgot, 50% of the PSE downvotes are yours

@Pieter Because it's way more stable and robust as a system when people start complaining

@EmilioPisanty That...may not actually be an exaggeration anymore. Is there a "total downvotes" stat?

@ACuriousMind =P

dunno

you know you shouldn't tempt me with things that can be looked up in SEDE, right?

Well, I think it is heavy-handed when a diamond guy deletes correct answers. And plain stupid when the question remains.

Anonymous

6:47 PM

@Pieter Don't worry, the question won't remain for long unless it gets edited and opened which is very improbable

@Pieter The policy that "If someone posts an answer to a homework-type question that gives away a complete or near-complete solution, in most cases it will be temporarily deleted." is plain for all to see. If you don't want your answer deleted, don't answer blatant homework questions, it's as simple as that.

@Pieter seriously, that question's not long for this world

we could delete it from 10k+ deletevotes

but it sends a much clearer message when the roomba gets it ;-)

And it is not stupid - the main reason for deletion is that we do not want to encourage these questions by providing any sort of answer to them. On the other hand, deleting the question outright would make it impossible for OP to improve their question to a state where it is not off-topic anymore, which is at least nominally the desired outcome for all closures.

@ACuriousMind I had given the OP a hard time in comments. He had clarified his conceptual problem there.

Anonymous

The conceptual problem should be edited into the question actually...

6:54 PM

^ that

Anonymous

If the OP does that it might be reopened, and you can add your answer back

Anonymous

(I think the deleted answer still remains in the system...and mods can add it back)

Anonymous

I remember one of my initial hw type question got reopened after doing that: physics.stackexchange.com/questions/327116/…

@Blue very few things on SE are hard-deleted

account deletion can be one (... but even then ...)

anything else is soft-deleted and and can be undone

Yeah, the only thing that's really unrecoverable is an account once it's gone.

6:56 PM

@ACuriousMind do we know this for a fact?

or is the data there and SE doesn't like to bring it back?

Well, okay, the possibility exists that the SE team simply doesn't want to bring the account back, but for all practical purposes it is impossible

To know that for a fact you probably need to get hired by SE ;)

Anonymous

@Pieter Anyway, I really hope you don't stop participating on this site. There is an acute shortage of experimental condensed matter physicists here. :P

I'm gonna do some condensed matter physics experimentation myself

cook a steak

Anonymous

GR guys sure are multi-talented ;)

unfortunately can't use a lot of GR for cooking

although gravity does hold down the food

which helps

7:06 PM

@Blue I am still quite annoyed. Such a deletion is a perfect way to break my addiction to the site. I will stop contributing for a while.

Anonymous

I feel that's a bit of an over-reaction. But sure, whatever you think is best. Have a good day

@JohnRennie I have found the perfect sandwich recipe

maybe not the best idea to tell a brit

birthplace of

Toast sandwich

A toast sandwich is a sandwich made with two thin slices of bread in which the filling is a thin slice of buttered toast. An 1861 recipe says to add salt and pepper to taste. == Victorian recipe == A recipe for toast sandwiches is included in the invalid cookery section of the 1861 Book of Household Management by Isabella Beeton, who adds, "This sandwich may be varied by adding a little pulled meat, or very fine slices of cold meat, to the toast, and in any of these forms will be found very tempting to the appetite of an invalid." == 2011 publicity == In November 2011 the toast sandwich...

good god

mine was definitely better than that

@Slereah you seriously think that that is worse than baked beans on toast?

7:20 PM

Well at least it's a sandwich

This is just

bread

Anonymous

Baked beans on toast doesn't really taste bad, if made well

Anonymous

There's a restaurant nearby my house which is quite popular for that

ola

eww baked beans

Actually I don't mind Waitrose baked beans

@Slereah well, I come from the land that'll happily serve you a dumpling sandwich, so I can't say that much

but in our defense, those are damn tasty

My sandwhich had meat, cheese, vegetables, oil, butter, goodness, mustard

salt and pepper ofc

7:24 PM

I usually just have bread n butter.

maybe some cheese on the side if I'm feeling special.

Do I want to know what "goodness" is?

@ACuriousMind blackened onions

Anonymous

@CooperCape I don't like butter..tastes too "oily"

Anonymous

cheese is fine

I'm usually quite a scarce butterer

Tortas de Gorditas, Chalco México

7:26 PM

►

^ that

Pretty liberal with the marmite tho

@EmilioPisanty oh my god

@0celo7 to be fair, I've yet to try that specific combination

it's a life goal from the second I heard it's a thing

also this

TORTAS DE GORDITA

►

Cows

7:55 PM

Will head home. Grab my camera then go to hollywood

8:13 PM

If a manifold is parameterized by a linear transformation or whatever, is there a specific name for such a manifold?

@SirCumference What do you mean by a manifold being "parametrized by a linear transformation"?

Wait, never mind, I'm stupid

do you mean like the Lie group manifolds?

@Slereah No nvm, I'm not making much sense anymore

Are you, perchance, tired? :P

Anonymous

8:17 PM

If elaborate your confusion, we could help...

@ACuriousMind "Golden rule of deriving: never trust any result that was proved after 11 PM."

Anonymous

@Slereah I wonder how many mathematical results that statement would make un-trust-worthy. :P

@ACuriousMind Very. Trying to make sense of everything quickly is hard

Sometimes I realize my questions don't make any sense and I'm just confusing concepts, other times I question everything I know about geometry

Naturally this is exhaustive... :/

@SirCumference Then my advice is the same as always: Go to sleep.

@ACuriousMind I'll go to sleep when this damned place stops pestering me with other non-math/physics classes and homework

Until then I have to study while it's day and I'm awake, and get the tedium done at night

8:22 PM

What does 'sparingly soluble' mean as a phrase, guessing it means it's not that soluble? (But that would be weird cause this 'sparingly soluble' thing got maaaadd hydrogen bonds)

Anonymous

@CooperCape Very less soluble

Anonymous

Like bicarbonates

weird

this has got like an alcohol group and a carboxylic acid group

(salicylcic acid?)

Anonymous

It could be many things

ugh

8:27 PM

guys ive been tryng 2 days

mark scheme says "Sparingly soluble because of van der waals forces between rings" then says "hydrogen bonds increase solubility"

want me to show you my progress?

for an exercise?

That's like answering and disproving the question.

im really stuck

Anonymous

@CooperCape Sounds fine

8:28 PM

@Blue will you help me?

@Blue Just seems odd is all

Anonymous

@ManolisLyviakis I'm busy

ok

thanks

any1 else can help me?

@ACuriousMind Right, I forgot tangent spaces exist. Though I notice my way of describing them didn't make much sense there

Ignore my blabbering

Cows

8:59 PM

I'm in Hollywood. Should be an epic time. I think i am 5 minutes early 😀

3 days im doing one exercise

and no1 can help

i give up physics

2

:'(

@ManolisLyviakis A quote as old as time

9:21 PM

Mean this in a friendly way - lots of moaning in here about basically first year mechanics and first year algebra, it only gets harder and more and more insane :p

Treat this as growing hair on ones chest and expanding ones mind ;)

All nighters, pain, stress, getting nowhere, months getting nowhere, making sense of another tiny bit of a subject you began 3 years ago, nobody asked you to do this mania but yourself and nothing will keep you going other than your own interest

I don't think we should glorify unhealthy and ultimately unproductive things like stress or all-nighters.

2

Anonymous

I'm not sure "things will only get harder" helps in the way of motivation

Anonymous

Also that's not always true

Anonymous

@ACuriousMind That is very true :)

Anonymous

Moreover, everyone has their own pace of picking up things. The education system is totally screwed up in that context. Sometimes, that can lead to a lot of frustration and often talking to someone who has gone through that phase before, helps. Trivializing the difficulties someone is facing is a very bad attitude.

9:34 PM

@bolbteppa Meh, I'm skeptical. Often the trickiest parts of physics are the conceptual parts. Once you get used to the math and refine your intuition, it is much easier, even if it becomes more complicated.

The education system is a lot softer than it was, e.g. from a review of an old crazy book on amazon:

"Indeed, most of the "drill" problems that the book provides are from British university honors' examinations in mathematics on which applicants are expected to score 15%"

Most people going into classical mechanics lack that intuition that takes time to build.

Yeah the physics becomes a lot easier once you get used to the math and it doesn't add that extra burden

@bolbteppa Seriously.

If you get through school without crying in the bathroom at least once then you didn't push yourself and didn't get as much out of it as you could have.

Anonymous

@SirCumference That is true. I think I can safely say that newtonian mechanics was the toughest area of physics I ever faced. Requires tremendous intuition to solve the more advanced problems. Electromagnetism is much easier in that respect

9:39 PM

Yeah that's my point, you might need to get dragged through the mud to be able for this stuff at times, but it expands your mind and is worth it as long as you're interested in doing it

@ACuriousMind There is a balance to me found. A place between losing hair and gaining weight from the stress and coasting along unchallenged and not really growing.

@Blue Felt the exact same way. By the time I took EM, I was much more exposed to the material.

@dmckee I think there is a meaningful difference between being "challenged" and feeling compelled to give up normal sleep or being so stressed you start crying.

Overall, Classical Mechanics was probably the hardest physics I'd taken, but certainly not the most complicated.

An all-nighter or two isn't going to do a lot of harm. All-nighters before every exam is the road to madness.

9:43 PM

@dmckee This is my second perpetual all nighter and I think I'm noticing the harm...

I think there is a tendency where people think the terrible things they experienced must be causally connected to their (later or immediate) success because humans a) want to believe in neat narratives and b) do not want to suffer without a reason.

So you get a bunch of graduates who pulled all-nighters and succeeded, and later are convinced all-nighters are a necessary and normal part of life

But that doesn't tell you anything about the harm the pressure did to the people who didn't make it, nor that there would have been less success without so much pressure.

No, that's objectively not true, if college was a cakewalk people could just waltz through it wouldn't be set up the way it is, the whole point is to challenge people out of their comfort zones and push them to their limits and beyond, it's pretty much predictable that sleep and other facets of life are extremely likely to be upset at times

Let us keep in mind that @ACuriousMind bailed from academia

savage

Moronic phone

It is also true that you literally do not function well on lack of sleep, are basically drunk at a certain point, but yet, miracles magically happen, and short term retention of high volumes of info is also a thing

9:55 PM

@bolbteppa All nighters at a diner—fueled by coffee and and a big plate of breakfast stuff—are when I overcame several major stumbling points in understanding physics.

I don't think they helped much with my exam grades as I don't cram worth beans. But I learned the stuff we'd covered when I hadn't gotten it previously.

But my buddies and I took a practical approach to all-nighter's. You had to eat and hydrate. And no matter what, you quit a 5:30, went home and got a hour's sleep.

Anonymous

All nighters are fine as long one is enjoying them. I personally study at night and sleep in the mornings and afternoons

That's no substitute for the real thing, but it means you go to class feeling at least remotely human.

@Blue The bloody physics faculty at UCSB scheduled all their classes between 7:30 and 11:00 am.

And I'm a night person.

Anonymous

@dmckee Lol. Then the best time to sleep would be in the afternoon. I normally make sure that my total sleep hours add up to at least 6

Anonymous

My class sometimes starts at 8 am and stretches till 5pm

Anonymous

So I get back home and sleep for 3-4 hours and then again around 5 am-6 am

10:03 PM

nih.gov/news-events/news-releases/…

I needed about 6.5-7 hours of sleep to function well, then. These days it's closer to 7.5 hours. I'm getting soft in my old age.

@bolbteppa There are several well studied costs to chronic lack of sleep. And more to chronic stress.

But there are costs to trying to arrange your life so that you never lose sleep or come under stress as well.

Yeah, all-nighters have been extremely useful, they come at a price, especially if you over-do it (which I have at times), it would be great if one could just balance, theoretically it's possible

Working on less than 8 hours sleep just ruins the whole day, and that glial thing seems to be why

@Blue Ah, you're a medieval sleeper then ;) (There's a popular hypothesis people before ubiquitious artificial lighting had biphasic sleep)

I too have biphasic sleep

I sleep from midnight to 7AM

then I turn off the alarm and go back to sleep

'til 7:50

'In order to gain more time awake in the day, Buckminster Fuller reportedly advocated a regimen consisting of 30-minute naps every six hours.' my god

10:12 PM

If I could just go to sleep on demand like that I wouldn't be tired

but alas it is not to be

Anonymous

@ACuriousMind Yeah, indeed, that's the term. I'm not naturally a biphasic sleeper, but over time I transformed into one to suit the schedule :P

Anonymous

@Slereah XD

"In information geometry, the Fisher information metric is a particular Riemannian metric which can be defined on a smooth statistical manifold, i.e., a smooth manifold whose points are probability measures defined on a common probability space."

whaaat

Information geometry

Information geometry is a branch of mathematics that applies the techniques of differential geometry to the field of probability theory. This is done by taking probability distributions for a statistical model as the points of a Riemannian manifold, forming a statistical manifold. The Fisher information metric provides the Riemannian metric. Information geometry reached maturity through the work of Shun'ichi Amari and other Japanese mathematicians in the 1980s. Amari and Nagaoka's book, Methods of Information Geometry, is cited by most works of the relatively young field due to its broad coverage...

Anonymous

10:33 PM

Anonymous

Now, that was a good twist

10:51 PM

^ That was a test, to see how uploading a PDF to chat worked. Answer: poorly.

Anonymous

11:11 PM

@dmckee Do you have any "public" website where you upload all these course notes? That one looks good

David Z

@dmckee huh, I'm intrigued that it came through at all.

Nope, didn't work

@Blue Not really. I ought to do what @DanielSank did: put them in a public version control repository.

@DavidZ Yeah. I kinda expected the upload tool to spit it back in my face. But it seems to have converted it to a medium resolution picture and just gone ahead.