2:00 PM

@BernardMeurer, wow, you've added a bunch of stuff to the book folder!

okay

@heather Yeah, I bought a crapton of books
on sale
Check the Science folder, I got those mostly because I figured you'd like them
I ended up liking them too lel

yeah, all those "best of make" =D

2:02 PM
Hi @rand

I <3 make magazine

@heather Did you create a pubkey?

almost done

2:06 PM
yes, I did
=)
so what is the use of these keys?

So, your private key is yours
NEVER EVER EVER
EVER

EVER

E V E R
Share it
with anyone

EVER

2:07 PM
unless...

EVER

Got it?

E V E R

Good
Your public key is what you give to people for them to send you encrypted messages
So with your pubkey, I encrypt a message, but it can only be decrypted with your private key :)

@heather Maybe you should read about public key cryptography before using it

2:08 PM
@BernardMeurer why don't you use hotmail?

@BernardMeurer I do solemnly swear that I shall never, ever (repeat ad infinitum) ever share my private key with anyone, not even my imaginary friend or parents

@Mew How is that meaningful here?

@heather Very good

it's easier

2:09 PM
@ACuriousMind Good idea
@Mew hotmail isn't encrypted afaik

I just wonder what secret messages you are sending to each other

and if it is it's some proprietary bullcrap

that needs to be encrypted
@SwapnilDas that site is going well it has 40 questions now

if you know, they wouldn't be secret, would they? =P

2:10 PM
Great.

most are

eesh
that's long
@BernardMeurer, so wait, is this the thing that will be broken as soon as quantum computers get big enough? is this RSA encryption, or another type?

1. Give me your public key (gpg -k)
2. Using my public key encrypt me a message
Yep, this is RSA

@heather there quantum cryptography protocoles that can be used then however

The best we currently have

2:12 PM
okay

that can check fo easedropping

::goes to check public key::

@Mew I might be adding some more, and they'll be hard. Be ready.

@SwapnilDas excellent
I probably won't be the one answering the questions (too busy)

@BernardMeurer, should I share it here, or via unencrypted email...?

2:12 PM
but I'm sure3 someone will

Your public key can be public :)

oh...duh

I'm doing that probably in Late December. Near 20s

ok

wait...@BernardMeurer, my private and public key look the same...

2:14 PM
so if we know your public key, we can deduce your private key
now that you have revealed that info to us

Lol

@heather You sure?

I haven't revealed that info too you guys @Mew

gpg --list-secret-keys

@BernardMeurer, yes, I'm sure

2:15 PM
@Mew Stop being stupid

@BernardMeurer make me

@heather Uhhh, is it exactly the same or just similar?

exactly the same, neither is too long

That's impossible

so i double-checked every character
and they're the same

2:16 PM
OH GOD

lol, heather broke gpg

I FORGOT
@ACuriousMind DELET MY MESSAGE
WITH THE PUB KEY
OH GOD

does any1 know a good interractive math forum for undergrad lvl?

FUCk

2:16 PM
ILL BE BACK

lol

@ManolisLyviakis, math.se

I HAVE TO REENCRYPT EVERYTHING

chill out dude

@BernardMeurer done

2:17 PM
@BernardMeurer, you shared your other key, didn't you...?

Jesus
Yes, lol

oh gosh

tsk tsk

lol

Making a new pair, I forgot I didn't have my aliases here

2:18 PM
i dont understand the language
:P
@heather

@ManolisLyviakis, what do you mean?

@ManolisLyviakis it is English

@ManolisLyviakis, you can ask any level of question on there...

@ManolisLyviakis don't you have google translate

2:19 PM
@ManolisLyviakis Uh, don't you mean Mathematics?

That there is a link to some...Swedish homepage, I think

i need a good interactive math forum for undergrad lvl to keep my motivation high this one here is more like question-answer site

### Mathematics

Associated with Math.SE; for both general discussion & math qu...
^math chat room

2:20 PM
ye ok agreed
but the topics oten are high lvl
often are*

in the chatroom?

and sometimes i just wanna see a topic that i havent thought of

@ManolisLyviakis ok how about scale free topological networks?

no, sometimes they discuss highschool level stuff w/ me, and you'll see all sorts of interesting conversations on there

@ManolisLyviakis like?

2:21 PM
that can be intersting

@ManolisLyviakis
you definitely want the chatroom

scale free topological networks? hahaha

yes
you want harder?

i thought more like differential geometry

oh

2:21 PM
no i want easier :P

na scale free topological networks is easy, don't judge a topic by it's name
that is to scare off the masses and for donating money

hahahaha

Lol.

lol

btw im a big fan of kenshin @mew

2:22 PM
yeah it's awesome hey

@Mew

@ManolisLyviakis Which yr student?

@ACuriousMind I think instead of having a normal shadow, I have compiler, interpreter, and linux errors

im on my last year

@ManolisLyviakis did you know that if you take a random group of numbers say the populations of each country

2:23 PM
Ohk. Thanks.

and the next most common starting number is 2

eesh, all of you guys are so far ahead of me

and then 3 and so forth

im a greek so ehre universities are 4 years standard time
ohh
no i didnt

Same in India.

2:24 PM
yes it applies to random numbers where the numbers can be over several orders of mangitude

wtf
why

I'm -3 year UG.

@ManolisLyviakis it is Benford's law en.wikipedia.org/wiki/Benford's_law
it can be explained by thinking about exponentials

@heather Well, in this case, you apparently just made @BernardMeurer post his private key and didn't do anything wrong as such :D

for the first 100 numbers
shoudnt be equal or something?

2:25 PM
@ManolisLyviakis yes you'd think at first glance that each nubmer should have an equla chance

I revoked the old key

@ACuriousMind, yeah, but I think I still kind of messed up creating my own keys =)

but this doesn't apply when considering random numbers that can span over multiple orders of magnitude
such as heights of animals

And assigned a new one to the things

2:26 PM
or populations

you mea

phew

or bank accounts
because

$2^2^2$
$$2^2^2$$

@BernardMeurer, close call

2:27 PM
it's because any quantity that increase exponentially, e.g $e^{kx}$

@ManolisLyviakis, to get mathjax, use the link in the top right where it says "for mathjax, see..."

will increase more rapidliy as the number increases
and thus most time will be spent at say 100
but then less time at 200
and then less time at 300 (because it is bigger now ti increases faster)

i got mathjax

hmm, why isn't the $2^2^2$ showing up properly...
$2^2$

dont know

2:28 PM
oh, wait
$2^{2^2}$

i can see urs

got it
$2^{2^2}$ @ManolisLyviakis

how?
ohh

@ManolisLyviakis so do you understand that for say an increasing quantity, most time is spent at 100, then less at 200 and less at 300
(if it's increasing exponentially that is)

most time spent?

2:29 PM
-----BEGIN PGP PUBLIC KEY BLOCK-----

kkSwKcQ8Ght3J3FwYuixODcQA3+3iOipjwYDjvSE6cHluto0VqCokpafgwxdiqCB
GPacpu7RWdCa+Ix/J/pU/6y1ZQcfyqIjg+lX0//t7HvdiZploEwxFEWYmgkabfuy
yrbOaVGkKp/AgRd2XLLqfHDAJTkT+X/28/TVwfCxRiP2JZDghSIjH2O+dXyP1gHV
ek70bMllyrv5gXBIuuNT95ei8GG4p9VHbubE8/L2DEEB4boiOD7Y4fZa7l3vW21j
KYZW4EOPLXTE0NnKZl2gQSHa4lkqweyRFwInABEBAAG0KkJlcm5hcmRvIE1ldXJl
ciA8bWV1cmVyYmVybmFyZG9AZ21haWwuY29tPokBTgQTAQgAOBYhBFiUEs4Z31gq
4QozIOQhx0GR6hhsBQJYTWCpAhsDBQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJ
There

is this physics?

My new public key

what...!?

@ManolisLyviakis no it's maths
it's benford's law

that's a looooong key

2:29 PM
what does in math mean most time spent?

mine's only 10-15 characters
but then, something's obviously messed up with mine

@ManolisLyviakis "time spent" is an example to illustrate the conept, but the concept applies to even scenarios without time (e.g populations, money etc.)

try and do

@ManolisLyviakis so just to illustrate the example first, suppose the number of bacteria is increasing at an exponential rate

ohhhhhh

2:30 PM
sudo apt-get install kgpg

i got it

It's a neat little GUI

Then the number of time the population spends at 100-200 is more thatn 200 to 300, and similarly the time spent from 1000-2000 is more than time spent from 2000-3000

suppose i have an exponential function it is more possible to give nummbers starting with 1

exactly
@ManolisLyviakis now if we have some quantity that spans multiple orders of mangitude (e.g. height of animals, bank accounts etc.)

2:31 PM
yeah but that is not the possibilty of picking random numbers

then this can usually be modelled by exponential function
and thus u are more likely to find 1 as the leading digit

yes by any population eatc
ohh im ok with that

@BernardMeurer, installing

@ManolisLyviakis if I tabulate all the populations of each country
you should see this apply

i though u where saying if i start picking numbers

2:32 PM
(or maybe populations by city is better for greater sample size)

Oh god I almost had a heart attack

@ManolisLyviakis no it has to be numbers that have some meaning

random numbers i get more with 1 leading digit

@ManolisLyviakis if I take the GDP of many countries you should see the same pattern

2:32 PM
@heather In the meantime gpg --armor --export [EMAIL] is what you use to export your pubkey

exponential growth
ohh
still its really cool

@ManolisLyviakis and note that this relates to "scale free topology" too
which one day you may understand :)

but i thought my pubkey wasn't right because it's the same as my private key..? @BernardMeurer

haha i almost thought it was some magical unexplained numberish weird thing
and got me more excited hahaha

package installed

2:33 PM
@ManolisLyviakis many people do think it is (even mathematicians sometimes don't grasp it)
and when it was discovered peopel thought this too
and then the explanation came about later

but it is not the same thing as picking random numbers
ohhh
they treated the numbers as random
so no explanation

@heather Run that command, you'll see your correct pubkey
It's huge

okay

@ManolisLyviakis they looked at random numbers like GDP by state

then just copy and paste it here

2:34 PM
ye
which is not hahaha

and saw it started with a 1 more often
exactly

so cool
nice to know

goodness, that's huge!

@ManolisLyviakis any quantity that spans multiple orders of magngitude should be roughly distributed exponentially

math exhange should have an add button for friending

2:35 PM
yeah

will I get an email with it, or...? because I can't copy and paste between the linux and chrome sides of my computer

so we could have more talks like this one

one moment, I'll figure out a way

yea
i gtg now it's getting late here in Aus

Oh, then just use kgpg

2:36 PM
@ManolisLyviakis, math chatroom = like hbar

it can export to an email

okay, just type kgpg?

but if you type @Mew in this chat I'll usually see it within a day or so
laterz all

Yeah, it's a program like chrome or anything else
it's a gui

"session d-bus connection created before QCoreApplication. Application may misbehave."

2:38 PM
Did it open anyway?

no
=/

Then kill it and try again
It did that to me too

kill it?

"Application may misbehave"...naughty application!
2

like, exit out of the terminal?

2:39 PM
crtl+c

doesn't seem to be working
maybe i'm just doing it wrong

Nah, it didn't work a couple times for me too
run htop
press F3
search for kgpg
if you find it press F9
then 9, and enter
this will kill the process

wait, so i ran htop and pressed F3
and now i'm in a new menu
and not sure where to look for kgpg

there's a "meters", "display options", "colors", "columns", and then submenus for each

2:46 PM
press F10 to go back

ah, okay, i think i did it now
do i exit htop, then, and try running it again?

it gave the same error

Why are you starting it from the commandline?

i thought i was supposed too
i just got it to run though

2:52 PM
Sigh
Oh
Yay :)

=)

Idk what's up with it, guess it needs a patch

"Welcome to the kgpg assistant!"
do I just follow it's instructions?
*its

4

For complete dummies when it comes to space-time, what is a manifold and how can space-time be modelled using these concepts?

Thoughts on whether to migrate to Math.SE or not? It already has at least one migrated duplicate on Math.SE. Perhaps we should concede that this question is going to be asked over & over on Phys.SE in the future. So we might as well keep this question on Phys.SE as a (should we say) 'bookmark'.

2:55 PM
do i "generate new key" or "start kgpg automatically at kde startup"? @BernardMeurer

No, use the one you generated already
and don't autostart it
On the list you should see your key there

okay, i think i have it set up now
@Qmechanic, isn't it a bit inconsistent to leave it here?