Mathematics - 2012-10-21 (page 4 of 5)

user19161

17:00

I intend to study 12 hours a day next year.

Matt N.

@JonasTeuwen It depends what you mean by that. I do like puppies. I don't like having it sniff around me all day, cleaning it up and washing my hands 20 times a day (since every time I touch it I wash cause it eats cow shit, cat shit and other dogs' shit, too)

Jonas Teuwen

But when I am able to it improves my well-being.

Matt N.

Too gross.

Jonas Teuwen

That being said, do you have some analysis or combinatorics you work on? I need to write papers.

@MattN. Hehe, but that is how puppies are 8-) (and you knew that before you got it...)

Matt N.

@JonasTeuwen I know : ) But I'm stupid. Honestly: IRL I make every mistake several times before I get it.

Jonas Teuwen

17:01

But you get it in the end, most people don't 8-(.

user19161

@MattN. What kind? Math mistake or other kinds?

Matt N.

@JasperLoy All kinds.

user19161

@MattN. Hmm, it is not your fault. This is my favourite line from Good Will Hunting "It is not your fault"

Jonas Teuwen

Papers! I need people to write papers with.

user19161

@JonasTeuwen You can't do it yourself?

Jonas Teuwen

17:03

Well, depends on what you mean with "can't do".

I probably can, but I leave stuff unfinished.

Also, collaborations can be useful in motivating each other and learning new things.

Matt N.

@JonasTeuwen Me! Me!

But I need to learn stuff first.

Need some time.

Jonas Teuwen

Okay! What is your favorite subject?

Matt N.

Need my 8 hours of undisturbed time :,(

Jonas Teuwen

@MattN. Mmm, I think you know enough to write papers.

Matt N.

@JonasTeuwen Functional analysis.

Jonas Teuwen

17:04

There is some time you should stop reading books and books.

Matt N.

I think.

Jonas Teuwen

And just write some papers.

Matt N.

Not yet. I'm sure.

Jonas Teuwen

Okay! That is kinda broad. Probability in infinite dimensions?

user19161

@MattN. Hmm OK, anything in particular in functional analysis?

Jonas Teuwen

17:05

I am sure there are things you can already solve that are publishable.

I seem to be a member of the group "functional analysis" here.

Matt N.

@JonasTeuwen Haha, no, I meant I liked Einsiedler's notes. (after getting used to him)

Jonas Teuwen

Holy cow.

Yes, those notes are quite enough to do some PDE things.

Matt N.

@JonasTeuwen Well. If you have something, let's discuss it!

Jonas Teuwen

I have plenty of things actually...

Matt N.

Oh my. I just roped myself into something.

Jonas Teuwen

17:06

Na.

Matt N.

@JonasTeuwen Do you have them compiled and ready to email?

Jonas Teuwen

I am doing something in light-matter interaction (scattering) with a student (he writes).

Matt N.

Or available online?

Jonas Teuwen

@MattN. Kind of, but unbrushed.

Matt N.

@JonasTeuwen No problem, let's have a look!

Jonas Teuwen

17:07

I'll push them in your mailbox but first I'll add some comments so you are not like "wadafuq".

Matt N.

Not really sure I dig PDEs, btw. The part of FA I liked was the part involving general topology or the bits about Fourier stuff. That was only contained in traces though.

@JonasTeuwen k!

Brian M. Scott

@MattN. PDEs aren’t functional analysis: they’re an invention of the devil.

Jonas Teuwen

@MattN. It is strongly related.

user19161

@BrianM.Scott They seem to use techniques from all bracnhes of math!

Jonas Teuwen

For instance, if $\Delta u = 0$ with $u(x, 0) = u_0$ the solution is given by $u = e^{t \Delta} u_0$.

And $e^{t\Delta}$ is again a thing from functional analysis (operator semigroup).

Working on some function space. The functions spaces there can be lovely described by Fourier analysis.

@BrianM.Scott How so? 8-).

See, harmonic analysis is actually the study of potentials (solutions to the Laplacian) kinda.

Brian M. Scott

17:11

@JonasTeuwen <SHUDDER!!!>

user19161

@jonas What do you think of the Evans PDE book?

Jonas Teuwen

I like PDEs, they require lots of creativity.

@JasperLoy It is okay, but perhaps you fancy Krylov more.

user19161

@JonasTeuwen Title? Never heard of Krylov!

Jonas Teuwen

"Sobolev spaces" and "Hölder spaces", I think.

They are much more... formal.

user19161

Oh, no wonder.

Jonas Teuwen

17:13

What?

Brian M. Scott

The reason that functional analysis isn’t horrible is that parts of it are really fancy topology. :-)

user19161

And BMS=Topology!

Jonas Teuwen

@BrianM.Scott The fancy Grothendieck thingies? 8-).

Espace Nucleaire.

Brian M. Scott

No, that’s a different direction altogether.

Jonas Teuwen

I had to take some time to wrap my head around those...

The topological vector space stuff in tensor products?

Old John

17:15

@BrianM.Scott Couldn't have said it better!

user19161

Does anyone here know the whereabouts of Grothendieck?

Jonas Teuwen

To me PDEs are functional analysis. Actually.

@JasperLoy Well, not precisely :-).

Matt N.

@BrianM.Scott : ) I don't know that yet. Though if the devil doesn't exist, how can he invent stuff?

Jonas Teuwen

But I know some people that seem to know. Somewhere in the south of France.

I don't know why people dislike PDEs so much, usually their reasons are a reason for me to like them.

user19161

Hmm, I wonder what made him do whatever he did. Someone must have upset him terribly.

Jonas Teuwen

17:16

Some reasons might be... you change the equation slightly and the behavior changes unpredictably. I like that, requires lots of creativity to wrap your head around what is happening!

Brian M. Scott

@MattN. Never underestimate the power of sheer, bloody-minded evil!

Jonas Teuwen

@JasperLoy Pierre Deligne's ad hoc proof of the Weil conjecture?

user19161

@MattN. The devil certainly exists metaphorically! Same for God.

user19161

@JonasTeuwen Are you a secret Bourbaki member? You seem to be...

Jonas Teuwen

But you have really cool questions like the one by Weyl (I think) Can one hear the shape of a drum?.

@JasperLoy No. 8-(.

Most of them are pushing up the daisies right?

user19161

17:18

Do you know that Bourbaki has another name?

Jonas Teuwen

My advisor in physics has Laurent Schwartz as his scientific grandfather 8-).

user19161

I think it is Arthur Besse.

Matt N.

@JasperLoy :,( God and devil and stuff does not exist.

Old John

I spent some years working on potential theory - which ought to have been all about PDE's ... but I side-stepped them, and worked on measure theory and topology instead :)

Matt N.

Just like homeopathy can't cure and astrology can't predict.

Brian M. Scott

17:19

@OldJohn Very sensible!

user19161

I remember we were talking about initials and how BMS would become BS if the M was removed.

Jonas Teuwen

@OldJohn I have quite some intricate measure theory issues in my PDE analysis...

Someone! Give me a sensible reason why PDEs are not a good object of study!

Jayesh Badwaik

@OldJohn If PDE's are devil, then I will not be worried about being Faust.

Jonas Teuwen

The paper by Felix Otto (et al) of formulating the Fokker-Planck equation (a field model) as a flow in a metric space is A+++.

Hah, Faust.

user19161

@JonasTeuwen I give you one: they are pretty random in pattern, just formulations from nature.

Old John

17:21

@BrianM.Scott do you happen to know anything about unicoherent spaces?

Jonas Teuwen

@JasperLoy First part: yes, second part: no!

First part makes it a challenge to find the reason why.

Old John

@JonasTeuwen No rational reason - I just disliked them for reasons I find hard to make concrete

user19161

@JonasTeuwen No? Don't PDEs arise from physics?

Jonas Teuwen

Sometimes they do, but often not.

Brian M. Scott

@OldJohn The name doesn’t ring a bell, but I’m taking a look.

jmi4

17:22

This is unrelated but I'm currently having an epiphany: Quotient groups $G/N$ make sense as a group if and only if they have a product that is well defined i.e. the product of cosets and this product is well defined if and only every element of $G$ normalizes $N$ if and only if $N$ is normal in $G$....wow.

Old John

@BrianM.Scott Thanks

Jonas Teuwen

They often arise from a physical model which is a tremendous simplification.

Charlie

@JayeshBadwaik oh !!!

user19161

My phone book almost came apart even though I don't browse it much.

Jonas Teuwen

And then they get modified mathematically to encompass a larger class.

And then enlarge the space so you can talk about them mathematically (the so called distributional solutions).

Jayesh Badwaik

17:23

@Charlie Hi!!!

Jonas Teuwen

And then I guess we are back at the nifty topology in functional analysis.

user19161

@jmi4 Well done!

Jonas Teuwen

@BrianM.Scott What was the topology you were aiming at, not the one in Grothendiecks way, then what?

Charlie

@JayeshBadwaik hello!!!

Jonas Teuwen

@jmi4 Mm... isn't that the definition basically? Or... I miss.

I might fail to grasp.

user19161

17:25

I wanted to ask Argon whether there is a song for every day of the week, since the RB song is only for Friday.

Peter Tamaroff

I don't even

Brian M. Scott

@JonasTeuwen I never had a great deal to do with the subject, but if you can dig up Compact-like operators and the Biare category theorem, J.J. Buoni, A. Klein, B.M. Scott, & B. Wadhwa, Integral Equations and Operator Theory 7 (1984), you’ll get an idea.

Jonas Teuwen

You published something in an operator theory journal? Kickass.

Got it!

user19161

@PeterTamaroff It's just about the meaning of .4999... really, which is .5. End of story.

Brian M. Scott

@OldJohn: Ah, now I recognize the term. No, I don’t know anything about them: I left continua theory to the geometric topologists as much as I could.

Jonas Teuwen

17:28

@BrianM.Scott That was before I was born... 8-).

Peter Tamaroff

@BrianM.Scott Look who's up.

IntegrateDisNutsSucka, that's a bad choice of a username.

Old John

@BrianM.Scott OK - thanks for looking - it is just a niggling problem that has annoyed me for about 12 years ...

Brian M. Scott

@JasperLoy No, that’s the easy part. The real story is how one should round the midpoint numbers.

Jonas Teuwen

There were some crazy topologists here last week, some man, named "Alan Dow", I thought he was Woody Allen.

At least, that is how he looked to me.

user19161

@PeterTamaroff I see Peter's name hidden there. It's in the proof.

Brian M. Scott

17:29

@JonasTeuwen I’ve not seen Alan in years; is he still a long drink of water?

Jonas Teuwen

The proof is in the eating of the pudding.

Peter Tamaroff

@JasperLoy Where?

Old John

@JonasTeuwen and he is almost an anagram, too :)

Matt N.

Reading a book twice is good. Teaches you everything you didn't understand when reading it the first time.

2

Jonas Teuwen

@BrianM.Scott Yes, but I am taller! 8-).

@OldJohn Yes!

user19161

17:30

Truth needs no proof, but proof needs truth.

Brian M. Scott

@JonasTeuwen I forget: how tall are you?

Jonas Teuwen

@BrianM.Scott About 2m.

user19161

@JonasTeuwen It was 1.8 m the last time.

Peter Tamaroff

@JonasTeuwen LOL

Matt N.

@JonasTeuwen You are a giant.

Jayesh Badwaik

17:30

@JonasTeuwen holy holy holy monkey.

Jonas Teuwen

What? I am a tiny boy 8-(.

user19161

Guess my height? I am a shortie.

Matt N.

Need to eat. Time to scavenge. See you all later!

Jonas Teuwen

See you!

Jayesh Badwaik

@JasperLoy 166?

user19161

17:31

@JayeshBadwaik 168!

Jayesh Badwaik

@JasperLoy okay, I some centimeters taller than you.

Old John

@JasperLoy even smaller than me at 175

Jonas Teuwen

@BrianM.Scott Hmm, is there even the word "topology" mentioned in that paper?

user19161

@OldJohn Well, I am Asian after all. Asians are short and have small ... .

Jonas Teuwen

But. I love PDEs.

Old John

17:32

@JasperLoy feet? :))

Jonas Teuwen

You actually have to understand what is going on to be able to proceed.

Unlike some other problems.

Peter Tamaroff

@MattN. "Amen" to that.

Jonas Teuwen

I don't like to read books. Destroys creative thinking and drains my mental energy.

2

user19161

@PeterTamaroff He doesn't do amen.

Peter Tamaroff

@JasperLoy Niether do I.

user19161

17:34

@PeterTamaroff Actually I say it just to mean so be it in a non-religious manner.

user19161

@PeterTamaroff neither

Brian M. Scott

@JonasTeuwen I’ve known a couple of fellows about your height; but you’re right, Alan’s not one of them. My first year in grad school I lived in a rooming house with a fellow who stood about 2.06 m and weighed only a little over 80 kg.

Charlie

@JonasTeuwen that's interesting

Peter Tamaroff

@JasperLoy I konw.

Jonas Teuwen

@BrianM.Scott Hah, he must have been quite slim.

It is a large disadvantage actually, unless you play basketball.

It is too tall, and the human anatomy does not seem to have such lengths as optimal points...

Brian M. Scott

17:35

@JasperLoy Hmph! You’re not short: I’m 161.

@JonasTeuwen This is true.

user19161

@BrianM.Scott What? A Caucasian at 161?

Jonas Teuwen

I have a lot of back aches and other issues due to my length (which is actually not that tall).

@Charlie Why?

Brian M. Scott

@JasperLoy Yep.

user19161

Hehe.

Jonas Teuwen

I think that about 1.80 is optimal, at least if I look around :-).

Perhaps 1.85 because then you are taller than average 8-).

Don't underestimate the power of nonaverageness!

user19161

17:36

As long as you and your partner have about the same height it is OK.

Jonas Teuwen

I have a couple of friends and family members with lengths above 1m95, and many of them have quite severe spine issues (or just pain). Discus herniations...

I have never seen a woman standing 2m tall.

user19161

@JonasTeuwen spine or spline?

Old John

@JonasTeuwen I have - and it is a scary experience :)

Jonas Teuwen

A friend of mine, 1,98m his wife is 1,58m :-).

@OldJohn Hah.

user19161

@JonasTeuwen Erm, how do they do it?

Charlie

17:38

@JonasTeuwen you have your own creativity.but don't like to penetrate the creativity of someone else and maybe get a little inspired?

Jonas Teuwen

Previous year, I had an experience... I looked at the guy and I was like OMG THAT GUY IS FUQIN TALL.

I never had that feeling before, really.

Brian M. Scott

@JasperLoy I used to know a delightful (and happy) couple who were 178 (him) and and 150 (her). They were one hell of a good mixed doubles badminton team, too.

Jonas Teuwen

It was the tallest guy in the country :-).

Old John

@JonasTeuwen :)

Jonas Teuwen

@Charlie Yes, that is fine. Does not require you to read the whole book.

@OldJohn It was really strange, I never had to look up to see somebody's face :-))).

Jayesh Badwaik

17:39

@JonasTeuwen Actually now that you say it that way, I don't like to read books either. I just read the results/general directions and try to prove them / develop the subject my way.

Jonas Teuwen

The guy is about 2,25m I believe...

user19161

@Charlie I think one has to read a minimum number of books first to reach Jonas's level, for example, 9 books.

Brian M. Scott

@JonasTeuwen I don’t even notice. I notice when I look down.

Jonas Teuwen

He looks like if he would give you a slap on the back you would break your spine.

@BrianM.Scott Ah, so the same as what I have probably :-).

There is a professor here that is about 1.40m :-).

It is pretty awesome when he is walking with the giant professor next to him.

Brian M. Scott

@JonasTeuwen Pretty much, yes. It does mean that I’m not intimidated by height, though! :-)

Jonas Teuwen

17:41

(About my length)

user19161

OK, so now I hear the ping one minute after the message, again how bad Chrome is.

Jonas Teuwen

They are in the same physics department 8-). Professor #1 about 1.4m the other #2 about 2m.

I once saw them both in costume, going to a meeting or so. Looked so cool.

Charlie

@JasperLoy i could only read ten books this year.

Jonas Teuwen

The giant and his dwarf. Kinda.

user19161

@Charlie That is a lot, if they are math books.

Charlie

17:43

@JasperLoy only two were about math :)

user19161

I wanna ask an interesting question again. Anyone notice that e=2.718281828... but the 1828 does not recur?

math101

Hey. If anyone wants to help out a poor soul then please take a look at my question

user19161

I wonder if there is a natural explanation for this.

Jonas Teuwen

Normality?

Old John

@JasperLoy pure fluke of base 10 representation

Jonas Teuwen

17:44

Perhaps take another base.

user19161

Perhaps this is a question that will get 100 votes?

Jonas Teuwen

It's just some apophenia.

2

Brian M. Scott

@JasperLoy Like that $\pi$ question? I’d never have guessed that it would explode like that.

Old John

@JonasTeuwen lovely word - I must find a situation for using it :)

Jonas Teuwen

I just found one 8-))).

Old John

17:47

@JonasTeuwen :)))

Jonas Teuwen

Perhaps, you can take another random number and notice the same!

Jayesh Badwaik

@JasperLoy Something like this

Jonas Teuwen

But, it is true that many nice things have come from the fact that people try to investigate something that seems just "random".

user19161

@BrianM.Scott I think I will post it now.

Jonas Teuwen

Like the guy that injected urine of bipolar patients into rats and notice it is way more toxic.

Peter Tamaroff

17:49

@JasperLoy "You aren't" and "You're not" are the same thing! Let's make that into "Yarn't".

Jonas Teuwen

@OldJohn Pareidolia is also nice 8-).

I use to use (phonetic representations) of εἴδωλον as a nickname when I was a teenager.

Old John

My favourite thing that might be random, but really has an underlying cause is $e^{\pi \sqrt{163}}$

Jonas Teuwen

@OldJohn H. Lenstra will be able to give you hours and hours of talks about the properties of a certain number...

Old John

@JonasTeuwen lovely word! - did you study Greek at school?

user19161

0

Q: Why decimal expansion of e has two copies of 1828

The value of the transcendental $e$ is $2.718281828459\ldots$. Is there any explanation why $1828$ occurs twice but is not recurring?

exponential-function

Jonas Teuwen

17:54

@OldJohn No.

I'm pretty much an autodidact.

Old John

@JonasTeuwen me too :)

Jonas Teuwen

I hardly learnt anything at school, I didn't know already.

Plus, they declared me retarded at age 4 8-(.

Old John

@JonasTeuwen lol

Jonas Teuwen

Which seemed to pop up some time ago when I had to do some administrative things, and had the remark "hmm, this can't be right... you said you graduated as engineer?" I was like "yep".

"Wow, education must have terribly degraded then! 8-)"

Jayesh Badwaik

@JonasTeuwen You are an engineer? Which one?

Jonas Teuwen

17:55

@OldJohn Was not so much fun! My father decided to believe that.

@JayeshBadwaik Physics/applied mathematics.

Jayesh Badwaik

@JonasTeuwen that's an engineer over in NL?

Old John

@JonasTeuwen darn

Jonas Teuwen

@JayeshBadwaik The degree...

@JayeshBadwaik When you append applied to it, yes.

And in one of the "Institutes of technology".

You can also do applied mathematics in a normal university, but you need a "technical" one, to get an engineering degree.

Is mostly historically based, I suppose.

Delft started as a mining engineering school.

@OldJohn But I guess he changed his mind at my graduation 8-)).

user19161

I thought there would be 10 votes on my question by now, but it is still at 0. =)

Old John

@JonasTeuwen :))

Jayesh Badwaik

17:58

@JonasTeuwen Awesome! You have 5 years to Masters (3+2)?

user19161

@JonasTeuwen If I could start life over, perhaps I would be an accountant instead.

Jonas Teuwen

@JayeshBadwaik Yes.

@JasperLoy Mmm, but you can't.

So you'll have to do with this one.

Old John

back later

Jonas Teuwen

@JayeshBadwaik But I decided to do 6 + 1 8-(.

@OldJohn Bye!

user19161

@JonasTeuwen Yes, and in this one I don't feel like doing accounting. The other Jasper Loy is an accountant though.

Jonas Teuwen

18:00

Perfect.

Jayesh Badwaik

@JonasTeuwen Ohh.

user19161

That's the guy on linkedin.

Brian M. Scott

@JonasTeuwen So the Loy books are balanced. So to speak.

user19161

Some people mistake me for the linkedin guy.

Jonas Teuwen

@BrianM.Scott Hah, mm. "Commutative algebra with applications to accounting"?

Sounds like a book TWK could write.

Brian M. Scott

18:01

@JonasTeuwen That’s just ... strange. :-)

user19161

Now I have a feeling my question on e would get 0 answers, but you never know.

Brian M. Scott

@JasperLoy Someone will probably eventually point out that it’s a coincidence, noticeable only because we use base ten.

Jonas Teuwen

@JayeshBadwaik Not on purpose, the circumstanced kinda worked not to my advantage.

@JasperLoy Well... that's harder than clicking.

user19161

@BrianM.Scott It's got no less than 3 comments already!

Jayesh Badwaik

@JonasTeuwen Ohh. 8-(

@JasperLoy I love joriki's comment!

Jonas Teuwen

18:04

@JayeshBadwaik No no, it is fine now.

Also, most people seem to do about 8 years!

Jayesh Badwaik

@JonasTeuwen Good. In any case, you are a kickass analyst now. 8-)

Jonas Teuwen

The 3 + 2 is only in "theory".

If I accept the premise then that is largely also due to my advisor who never compromises on "quality".

Either you did it well, or you have to do it over (or stop it completely).

Only the last thing is not really an option for me. Usually.

Jayesh Badwaik

Hmm. But seriously, sub-par quality is more detrimental than not doing the work, since it adds to the boredom of repeating the thing.

Jonas Teuwen

I have trouble accepting I am ok at analysis as this would have far fetching consequences.

user19161

18:24

After I leave the room, log out and restart comp, I still haven't left the room? Amazing!

xiamx

18:41

need some help with modular arithmetic math.stackexchange.com/questions/218193/…

Old John

19:02

@JayeshBadwaik I also like the comment/quote from Doron Zeilberger

Brian M. Scott

@OldJohn Yes, that’s one of his reasonable opinions. He has some others that verge on crackpottery.

Old John

@BrianM.Scott Interesting - I must look into his site a bit more in that case :)

user19161

So my question has 118 views now, but mostly from myself I think. =)

Brian M. Scott

@OldJohn Try this one.

@JasperLoy I suspect that it inspired this question. And that’s a lot of comments if you count the upvotes.

user19161

@BrianM.Scott Yes, I hate it when the comments are more upvoted than the post!

2

Jonas Teuwen

19:12

@OldJohn Haha, Zeilberger rocks.

user19161

Only fish burger rocks.

Old John

@BrianM.Scott Brilliant! - I want to see that proof by Jacob Fox now ...

Jonas Teuwen

I need some Scotch, a bottle or so.

user19161

As a consolation, my meta post has two upvotes, phew!

Jayesh Badwaik

@JasperLoy which?

user19161

19:14

It turns out that the person bumping the post that inspired the meta post is none other than our mean square.

Brian M. Scott

@JonasTeuwen ‘I’d rather have a bottle in front of me than a pre-frontal lobotomy.’

user19161

@JayeshBadwaik Here meta.math.stackexchange.com/questions/6403/…

Jonas Teuwen

Exactly.

user19161

@JayeshBadwaik Actually just now when I plus oned your tex question and said hint hint, you did not get my hint, but never mind. =)

Jayesh Badwaik

@JasperLoy hmm. now i get it.

user19161

19:22

@JayeshBadwaik My sentences are all very deep. You need to read between between the lines.

Jonas Teuwen

Hah.

Jayesh Badwaik

@JasperLoy but, but I have LCD.

Jonas Teuwen

With me too.

I usually don't feel like explaining.

Jayesh Badwaik

@JonasTeuwen With me three.

Jonas Teuwen

Hmmm... you act peculiar. Do you mean LSD instead of LCD?

Jayesh Badwaik

19:24

1 min ago, by Jonas Teuwen

I usually don't feel like explaining.

user19161

That is Feynman.

Jonas Teuwen

Feynman? I wrote some stuff about Feynman diagrams in my thesis :-)).

Jayesh Badwaik

@JonasTeuwen holly molly

Jonas Teuwen

Holly molly? What?

user19161

The only paper that I touch every day now is toilet paper.

Jonas Teuwen

19:25

I use relatively paperless.

TP for my bunghole!

Brian M. Scott

@JonasTeuwen You steal your relatives’ TP?

user19161

10 comments now!

Jonas Teuwen

@BrianM.Scott Need all the TP I can get... 8-).

Moar TP.

user19161

Some toilet paper is so thin that they are useless. They break too easily.

Jonas Teuwen

You need five layer with silk addition TP.

XXXXXtrasoft.

You will want to sit on the potty all day, so soft!

user19161

19:27

This chat is degenerating fast.

Jonas Teuwen

And there is only one offending party...

Henceforth, I have proven I need a brew.

Brian M. Scott

19:37

@JonasTeuwen Oh, I don’t know. My mind has to stand on a box to see out of the gutter.

3

Jonas Teuwen

8-).

Sigh, I can't figure out something simple. Suppose $f$ is holomorphic with zero of order $k$ at $a$, then obviously,
$$\frac{f'}{f} = \frac{k}{z - a} + \frac{g'(z)}{g(z)}$$
where $g$ is a non-zero function on the domain we work on.

Now I wonder if $g'$ cannot have zeros.

(if $0$ is kicked out)

Probably not, good.

I think I write down about 20 times as much as what I actually deem useful 8-).

I threw out a couple of thousand pieces of scrap paper today.

Nimza

Aaaa, good evening! Please, help me, "Study of the generalized Radon transform and its economical applications." - is it normal for title of paper or should I change "study" on something other?

maybe research ...

@JayeshBadwaik, @JonasTeuwen what do you think?

Old John

19:56

@Nimza Is it a paper for publication in a journal?

Nimza

@OldJohn yes

Old John

Then I would tend to think that the use of "study" or "research" is superfluous - what is wrong with just " The generalized Radon transform and its economical applications"?

Nimza

@OldJohn oh, thanks! I had such variant in my mind

Old John

@Nimza Although I am not an expert - not having published many papers myself :)

Nimza

I'll wait a little for different variants then)

Jayesh Badwaik

20:00

5 hours ago, by Jayesh Badwaik

@JonasTeuwen I am a kiddie currently.

so, you cannot expect research paper titles from me

Old John

@Nimza do you have an abstract of the paper you could share with us?

Jonas Teuwen

@Nimza Kickass. What is it about?

Did you solve the problem?

The first part sounds like it is within my area of expertise!

Matt N.

Good evening, ladies and gentlemen.

Jonas Teuwen

Good evening, Matt, bro.

Old John

@MattN. Hi Matt

@MattN. this question (if I could understand it!) might be connected to the coins problem we solved recently

Matt N.

20:22

@OldJohn It might but I'm too tired to think about it properly.

Old John

@MattN. and I'm too tired to try to work out what on earth he means ... life is too short for some things :)

3

Matt N.

@OldJohn It is!

Night everyone!

Old John

@MattN. night Matt

Nimza

@OldJohn no, I haven't an abstract

@JonasTeuwen its about Radon transform over level surfaces of positive homogenous concave functions, motivated by economics of course

@JonasTeuwen I obtained for example the explicit inversion formula

@JonasTeuwen so what about the title?

Jonas Teuwen

20:52

"of course" - why? Are you a pupil of Aliprantis?

Nimza

Because it was told in title!)

Jonas Teuwen

Oh.

Nimza

hehe)

Jonas Teuwen

You probably do not want to show it to me to help you determine a title before it is published and after it is not needed.

Kinda.

Nimza

@JonasTeuwen it isn't ready yet

Jonas Teuwen

20:54

Oh, then no title yet.

"On some mathematics"

Nimza

I have to tell a title to my faculty

Jonas Teuwen

Oh, then it is fine.

Can always change it when you publish.

Nimza

ok, thanks

Transcript for

$Mathematics$ Mathematics