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10:04 PM
Right. But it means $f(V)$ need not be open. Of course, it is open in $f(X)$, but not generally in $Y$.
 
Alright, that clears things up! Thanks a lot :)
 
hi @DanielF and @Studentmath
 
Hey Prof. @Ted
 
Good evening, @TedShifrin.
 
Well, @Studentmath, I ended up with 11 A's and A-'s ... it was the bottom end that was bad.
Average was 199/300.
 
10:07 PM
Out of how many? 30ish, right?
 
@TedShifrin O_o
@TedShifrin Aren't english test supposed to be "doable" ?
As opposed to french exams
 
Well, they passed as a class. If you don't consider the failures, what's the average?
 
Out of 29, @Studentmath.
2 of the F's haven't been in class for a month.
 
I don't think they expected to pass
How did there tests look like anyway, did they even try answering all?
 
No, and several of the D's were praying for me to be a generous deity and give them C's.
 
10:09 PM
They could've done not coming to the exam either.
 
r9m
@TedShifrin Is there an A in your class that never attends your lectures ? :E)
 
The D's and F's were ≤135/300.
Two C–'s were ≤130. Sigh.
Not even remotely close, @r9m.
 
Heh
 
@r9m: Even when I teach out of my own books, I do not read the book to the class. Really didn't do it with the probability class.
 
I never saw Mathematics as a place where the generosity of the tester has much to do with the grade
 
10:11 PM
@Studentmath: You did miss an error, though :P
I caught it while grading this afternoon.
 
Oh?
 
Hi @Ted
 
One needs independence for the sum of Poissons to be a Poisson :P
@Mike! Aren't you supposed to be incarcerated?
 
Oh.
 
10:11 PM
@Hippa: I will hold you to high standards when I grade your exam.
 
@TedShifrin >.>
@TedShifrin I'll do it during the holidays (= two upcoming weeks)
 
I don't mean to ruin your Christmas, @Hippa :P
 
@Ted I start grading in about half an hour
 
I'll never sit on probability exams.
 
I guess they all assumed it anyhow? Or anyone excelled and mentioned it?
 
10:12 PM
Your parents might want me assassinated.
 
r9m
@TedShifrin I meant to ask if there is a S-rank rogue ninja in your class ;) .. (ie students who end up with good grades even though they miss out your lectures)
 
@TedShifrin I will only do what I can do (obviously), I won't be able to do the ones on continuous probas etc
 
Two mentioned it, @Studentmath :P
 
A's?
 
@TedShifrin I'll consider the exam as your christmas gift :)
 
10:12 PM
Of course, @Studentmath.
LOL, @Hippa. Comme tu es bizarre :P
 
Nice, there's always hope!
 
I'll never even study probability.
 
@Balarka don't say such a thing
 
Teaching this class made me realize: (1) I should have taken the class as an undergraduate (the reasons I didn't made sense at the time); (2) I should have taught it years ago, before just before retiring.
 
10:14 PM
It's BS.
 
I've always liked applications, but the teacher — star though he was — was rather a prima donna, and so I avoided him. Stupid, in hindsight.
 
@Ted I guess I'll be drinking martinis at 10 tonight...
 
It's an important tool to study other things @Balarka. I've seen quite a few papers researching groups with probability.
 
You've got to admit it's BS @Studentmath
 
LOL, @Mike, should I ship you some?
 
10:14 PM
@Studentmath Well, well aware.
Random group theory, Gromov's discoveries.
Yet I will not study them.
 
Someone should tell Balarka that a good deal of pure math people doing number theory and algebraic geometry over finite fields think probabilistically.
 
Aware.
 
Well I won't argue @Balarka as I don't know enough - personally I liked it, liked using the approach in Graph theory and other things - but then again, just me
 
Probabilistic (Ergodic at the moment, seeing the great development in the merging of the two branches) number theory is quite popular, in fact discovered by Erdos.
 
@Ted Hm... last time I ignored him for being intentionally ignorant it didn't do any good. I wonder if it'll work this time?
 
10:16 PM
No @Mike!
Please.
 
@Ted I don't think your martinis will reach me in time.
 
I dunno, @Mike. We expect immaturity from 14-yr-olds, but when the 14-yr old is math prodigy, it would be nice if he'd listen to us adults sometimes.
 
:( I'm just a kid. Have mercy.
I am not even a prodigy.
I suck at covering spaces.
 
@Mike: When does the grading orgy commence?
 
@Balarka I'm just a kid too, but that doesn't mean I ignore the advice of my elders!
 
10:18 PM
ponders that
LOL ... judicious edit.
 
Are you sure you used the wroding you intended to, @Ted?
 
@MikeMiller I apologize. I'm sorry. :(
 
@Ted 2:45. Just enough time to grab some coffee and cry.
 
I'm never sure, @Studentmath
 
With high probability, at least?
 
10:19 PM
@Mike: I have one piece of advice. It is always darker during the grading than it is after, when you total the scores.
On what, @Studentmath?
 
If I apologize to @Ted for being an ignorant prat, will he unignore me?
 
Grading orgy, but I was just kidding. I should go back to exercises on topology
 
@BalarkaSen prat = brat
 
I think it would have to include a promise to not be an ignorant prat in the future, @Balarka
 
OK, I am sorry. I am seriously sorry.
I'll never do that again.
 
10:21 PM
Don't promise things you can't do
 
see^^ @TedShifrin this is not lawyer talk
 
@Ted I got first choice on problems to grade, and I picked the three they should all get right... we'll see how my judgement holds up.
 
bashes @Studentmath
 
Why did you get first choice, @Mike?
It's fun interpolating conversations ...
I have practice from other chat rooms :D
 
10:22 PM
yes you are a seasoned pro
 
Like solving a riddle, I considered ignoring some active chaters just to try it out but I am too soft
 
It comes with being archaic, @skull.
 
@Ted 'cuz I'm the first one to start grading. The next guy starts half an hour later.
 
oh ...
WE always did it simultaneously as a giant party, @Mike.
 
@TedShifrin and smart
 
10:23 PM
@TedShifrin I promise to never ever be an ignorant prat again.
 
@Ted Balarka wants you to unignore him in exchange for never saying ignorant or annoying things again, and deeply apologizing for those past occurrences.
The word "prat" is involved too.
 
Quote "I promise to never ever be an ignorant prat again."
 
Ah, so that explains your "don't make promises you won't keep."
 
@Ted I'd like that, because it sounds like they'll feed me... not so today
 
well, starving grad students don't make good graders
 
10:26 PM
Tell my instructor that :(
Also tell them we need 3-4 beers to be optimally productive
 
Um, no, not that
 
@TedShifrin
 
Do you have to grade and teach when you start an graduate program?
 
graduate, you mean, @Studentmath?
 
(Not that I see that as a chore. Well grading of course, but not teaching)
 
10:27 PM
sigh he'll never unignore me.
 
Most grad students in math do, yes
 
@Ted wops, yep
That's rather nice
 
And you accuse me of typing what I don't mean ...
 
It's 00:27 here, I've some rights
 
@BalarkaSen is throwing himself on the mercy of the court @TedShifrin please reconsider?
 
10:28 PM
@Studentmath, well, you'll also soon be carrying a rifle. What's your point? :D
 
At least at this age I can also drink in here :P Unlike in the US..
 
You can drink long before you're 21 in the US, @Studentmath
 
Well, legaly?
 
You never said that!
 
It was implied
somewhat
It's actually harder to drink here before 18 than in the US
Due to IDs not being fake-able and extremely hard punishments for such things
 
10:31 PM
mathematicians should know not to make tacit assumptions ... maybe you're still a chemist, @Studentmath :D
 
OK, I guess I have to go to sleep, even thought I won't sleep in peace as @Ted didn't yet unignore me. I'll come up with a solution to the push down problem after I wake up @Mike.
Bu-byes.
 
@Ted Just might be, after all it's been almost three years of that and only 2 of math :P
Night @Balarka
 
later pal
 
Actually, 1 year of math.
 
yeah, @Studentmath, I was wondering.
 
10:35 PM
See, I can't even count and you try to associate me with mathematicians
 
well, only discrete mathematicians count
2
 
Alexander will love that sentence
 
We continuous mathematicians only count when we have to :)
 
Oh, speaking of continuous mathematics I picked a book on ODE that I started practicing, as it also touches a tiny bit of complex analysis.
 
ok, @Studentmath ... you still have stuff to learn :D
 
10:38 PM
More than I will ever manage, probably :P
 
Me too ...
 
Eitherway, I am back to practicing topology
 
OK ... have fun
 
Guys the LaTeX in chat rules are not on the list
 
oh no, the end of the world
 
10:40 PM
@TedShifrin No that was last year
 
sorry, @Hippa ... that was when your laptop caught fire
 
@TedShifrin >.>
 
Oh cool @Hippalectryon you made the mistake of buying a HP too?
 
LOL
 
@AlecTeal It's an emachines
 
10:43 PM
Yikes @Ted, the gauge theory course description says I might want to know some Hodge theory... better get to work on G&H then
 
80°C for now
That's ok
 
yup @Mike ... or, at the very least, Warner
 
Lol
My HP laptop idles at 84!
 
Mine used to be 95°C until I cleaned the fans
 
Mine is so hot all of the time that I own 3 copies of a certain book just to prop it on, without this it overheats when doing nothing with 3 of the 4 cores turned off and the remaining one clocked to the lowest 800mhz.
 
10:45 PM
I would assume hodge theory and the hodge theorem are not precisely the same...
 
New it's 55 watt-hour battery lasted 20 minutes.
 
I'm glad to know books are more important for propping than for reading
 
@TedShifrin it's a Java book, that's why I chose it "I have no other use for this shit"
 
The latter, as far as I know, is about Riemannian manifolds rather than complex
 
Hodge theory for complex manifolds probably important for gauge theory, @Mike: I would think they mean the Hodge Theorem.
no, the Hodge theorem is totally general for elliptic operators ...
 
10:47 PM
Oops
 
I left out a NOT in the first sentence, @Mike. I think you need to know the analysis of the Laplacian, etc., not how $H^{(p,q)}$ varies in families.
I think @Mike is supposed to be grading now.
 
11:05 PM
@TedShifrin Seems that not many books on manifolds prove the Hodge theorem.
I really like the appearance of my current hat.
 
@JasperLoy It isn't centered
 
11:22 PM
I have put on a new picture. Enjoy!
 
@JasperLoy That's an odd shade of blue.
 
Shades of grey
 
@KhallilBenyattou Why did you remove it?
 
To maintain an air of mystery about myself, @JasperLoy. :P
 
11:30 PM
All of you are getting a little paranoid. I am not from the CIA.
 
Or are you? ;-) wink wink
 
@TedShifrin I have just recommended your book - but genuinely, over Lang's Multivariable calculus
 
@AlecTeal I do like Lang's book.
 
@JasperLoy I do not like his "Calculus of Several Variables" - well I don't mind it, it is just not of the same standard as his other books, it's slow and sparse on Analysis
 
@AlecTeal Aha! That is why he has a separate book on analysis, lol.
 
11:36 PM
@JasperLoy he has a separate book on Linear Algebra but wastes 150 pages with a shallow introduction in COSV, he probably could have put the entire LA book in that space!
 
I will be using Marsden and Weinstein's Calculus 1,2,3 to study calculus.
 
I hate to say this (I'm looking for a reason to legitimately bitch at @TedShifrin for some reason) but I do recommend his expensive and out-of-print book, Multivariable Mathematics, it's ... really good
@JasperLoy I also hate the American system of "Calculus 1 2 and 3" it's just... horrible.
 
r9m
@DanielF sama .. is there any community rule against deleting old answers (with 0 votes) that already has other (possibly better) answers ?!
 
@r9m No.
@r9m But you can only delete 5 old answers a day.
 
r9m
@JasperLoy Thanks ! :-) 'cos I just deleted 5 answers of mine like that !
 
11:48 PM
@r9m But a mod may contact you if he feels it is not good for the site.
@r9m When I was deleting my answers years ago, they left me alone.
 
r9m
@JasperLoy I see ! but in each case I can argue why the other answer is better/more appropriate than mine :-)
 
@r9m Well, if you are a low rep user, they will probably ignore your actions, lol.
 
r9m
@JasperLoy so higher the rep the more I will be investigated ?! ;) I live in India (I see that happen every now and then :P)
 
@Ted One fifth down.
 

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