@robjohn Hmm, I can make a file say Fourier.tex with environments named introduction and such, and then if I include that file the engine makes a section named Fourier, a subsection Introduction with the text from the env and so on.

@JonasTeuwen I see.

@robjohn Here is an example. Currently I also have a version history and repository push.

@JonasTeuwen Hi Jonas - finished grading? ;)

Just populated it with some stuff...

@OldJohn Yes!

@JonasTeuwen Great!!!

@OldJohn Yes... :) Thanks.

So I can work on my cool stuff now. Quantum probability for now.

I need some traces for my von Neumann algebras.

@JonasTeuwen Eeek - quantum probability is something I have never looked into!

Nearest I ever got to probability was considering using Brownian motion to prove some results in fine topology

@OldJohn Excellent!

@robjohn ¿?¿?

@JonasTeuwen I avoided having to do brownian motion in the end, but it was useful to keep in mind that the asymptotic paths I studied could be as bizarre as a brownian path

@OldJohn Whenever I read "Brownian motion" I think about "Bowel movements"

@PeterTamaroff ROFL :)))

Is it possible to use /cancel {blah} on main to cancel out?

@Gigili Use \not

Umm, I'm not sure that's what I want

I have a bit of an open ended math question, if anyone's up for it.

@AlexBecker Fire away

@Gigili What do you want to cancel out?

@OldJohn I'm trying to compare closed curves in different Riemann surfaces.

@AlexBecker Not really my area - but go ahead

Say for example a curve that travels around the handle of a coffee mug (torus) versus the same sort of thing on a higher genus surface.

@PeterTamaroff Umm, an equation in both denominator and numerator.

They are in an obvious way similar curves, but can this be made rigorous?

@Gigili Give me the code and I'll cancel it and give it back.

I guess what I'd really like is, given a marking of a torus, a canonical way to mark higher-genus surfaces. But that may be asking too much.

@PeterTamaroff I wanted to help this guy

@AlexBecker I suspect you are asking too much - but I am not an expert, I'm afraid

@Gigili Seems one can't cross out long ones, just single symbols

@PeterTamaroff Aha, OK. Thanks.

I read somewhere \cancel{blah} would do it but it doesn't work.

@Gigili You could use the old colour trick maybe.-

Doesn't work either.

@PeterTamaroff Oh, which trick do you mean?

@Gigili Like highlighting the crossable terms in the same colour.

Aha, let me try it ...

\color{red}{blah}?

@Gigili $$\color{red}{Yes!}$$

@PeterTamaroff $$\color{red}{good,good}$$

Nope.

sad panda smiley

@Gigili No what?

Doesn't work.

@Gigili So much for your CS diploma.

Hello cuties

@OldJohn You should look into that, it is really cool.

@Gigili Look

@Gigili Nothing tops the inhabitatins of Pupulon.

@PeterTamaroff Hey, that's my trick!

I meant to cancel them out! Not to make it colorful.

@Gigili But I told you that couldn't be done, so you had to make it colourful.

I don't have to!

It's a silly idea.

@JonasTeuwen Sorry Jonas - got distracted - what should I look into?

@PeterTamaroff there you go

@OldJohn Brownian motion :-).

@Gigili Ha, OK.

@JonasTeuwen Yes - I read about some really cool connections between potential theory and Brownian motion - and even bought a very thick book by Doob about it all

@OldJohn Ah... Sir Doob :-).

Maybe make the sin A/cos A blue then the tan A in the next line blue as well!

What is the coolest connection you know?

Just hope no one is color blind

Well, there's a meta thread on the matter!

@JonasTeuwen I still have it - but I only ever used some bits from the first 2-3 chapters ... and the appendix at the end :)

@OldJohn Ah... the way I read books 8-)).

@JonasTeuwen :)

@HenryT.Horton Asaf is.

@JonasTeuwen I can't remember any of the cool connections - just recall that some of the proofs I struggled through could apparently be done much more simply just by running a Brownian motion

$\color{red}{\text{Quiet, only speak about him in color!}}$

@JonasTeuwen Are you in Holland?

@HenryT.Horton $\color{orange}{\text{It makes his eyes fuzzy, but that doesn't mean he can't read!}}$

$\color{Silver}{\text{(deleted)}}$

$\color{blue}{\tiny{\text{Let's see him try to read this}}}$

Ctrl+ Ctrl+ Ctrl+ Ctrl+ Ctrl+

@HenryT.Horton Even at my age I can read that :)

@HenryT.Horton $\color{pink}{\text{LOL}}$

@HenryT.Horton I'm very short sighted. That is hard to read!

I am now member of the PhD representation organization board :-).

@JonasTeuwen Can we be friends?

@JonasTeuwen Congratulations!

@JonasTeuwen Wow - that sounds impressive

@JonasTeuwen JK, congrats!

@PeterTamaroff Huh? Why link to that? 8-).

Impressive... Nah :-).

But it is cool.

Engineering Professors HATE HIM : Doctor's discovery revealed the secret to learning any mathematics subject in just 10 days. Watch this shocking video and discover how you can rapidly learn any math subject in just 10 days using this sneaky mathematical secret...free from the computer...free from memorization...and absolutely guaranteed!

@HenryT.Horton What?

@HenryT.Horton I bet it doesn't work with Abelian varieties!

that guy is taking control over half the tabs I have open

@HenryT.Horton Amphetamines?

Damn you X... stealing my key bindings.

@JonasTeuwen I laughed a little too hard at that.

Quick question: given a genus g Riemann surface with fundamental group G, is G necessarily the homomorphic image of the free group on 2g generators?

I must sleep - back tomorrow

Bye all

@OldJohn Sleep well.

@AlexBecker Yes, $G$ will be a quotient of $F_{2g}$ and hence is the image of the natural projection homomorphism onto the quotient

@HenryT.Horton Thanks. I was pretty sure this should be the case, but wanted to check because my intuition for Riemann surfaces is still weak.

@AlexBecker In what year are you Alex?

@JonasTeuwen I'm making apfelstrudel =D

O no no, it is apfelkuchen

But it has "streusel"

@PeterTamaroff Enjoy.

@JonasTeuwen I guess the ones you can get there are über awesome.

@PeterTamaroff I'd have to go to Germany :-).

@JonasTeuwen Oh! I thought you were there.

@PeterTamaroff No, that are the neighbors.

For some good strüdel you need @tb.

@JonasTeuwen You're in?

@PeterTamaroff NL.

@JonasTeuwen What should it be called "Holland" or "Netherlands"?

@PeterTamaroff Whatever you like, but officially it is "The Netherlands" (Kingdom of...).