A rather interesting non-mainstream theory that doesn't hold much water, considering the graviton is expected to be an electrically neutral spin-2 boson & the electron is none of those things

@Kaumudi Oh it just started. It's 7 am here

@Kaumudi people tell you that the Glastonbury festival is an amazing place where you can have a fantastic spiritual experience. And people tell each other this to convince themselves that it's true.

Coldplay having a crowd of (supposed) fans is magical?

Guess you've never been to a Pearl Jam concert then

Okay. The crowd singing the songs for the band occurs frequently

@Kaumudi I'm with Kyle on this, I always sing along at gigs (sometimes in tune). But don't let us spoil the magic for you.

Sadly, there are people in the crowd who have no business singing because it hurts

@KyleKanos if you can hear yourself (or anyone else) sing the sound system isn't turned up enough :-)

@JohnRennie True for indoor concerts. I'm not terribly convinced for outdoor concerts

Oh well, I have to go up and change. The SciFi reading group I go to is meeting in town this afternoon.

I guess I'm not particularly fond of Coldplay. I mean, they're alright & I'd listen to them if they were on the radio or something, but I wouldn't go out of my way to listen

what about Neikd?

Dunno what that means

sorry it's NEIKED

it's an artist

that is in top 5 songs in Aus atm

Eh, it's alright

Probably same thing as with Coldplay: listen to it if it's on, but not go searching for it

ok

how about this one:

not bad

how about this one:

Well it's 12 minutes long, give it time to get better

you must like this one ^

so catchy and tuneful

It's alright, but I only gave it like 20 seconds because I wanted to get back to Holy Judgement (Final Destination) Part 2

well thanks for giving it a try

it's one of the best

which book?

hello everyone

halo heather

@obe, please don't leave. I gave you girl advice for crying out loud =P

@Mew, hello

wats ur favourite song heather

@Mew, hmm, good question

thanks bro

I like Young the Giant, Miike Snow, Imagine Dragons, Two Door Cinema Club, MGMT...it's going to be hard to pick a single one.

wow never heard of those

is this the music for teens of today?

@Mew, you should try listening to a few of them, they're all really good. And no, I don't think so. Well, maybe Imagine Dragons a bit, but I think I have rather weird music taste.

I'd say Animal and Ghengis Khan, by Miike Snow, Roots and It's Time by Imagine Dragons would be good, and then, hmm

noit bad

Maybe Apartment by Young the Giant

is that dark type music?

well it's all alternative/rock/electronic, I've never really heard the term "dark" used with reference to music so I couldn't say.

i made it up lol

just the one i listend to sounded "dark"

not bad

which one?

but I guess didn't sound "happy"

but more depressed

um lemme check

I can't find it

they all sound electronic tho

okay, well, yeah...maybe try one of the Young the Giant ones, those are a bit less electronic

na electronic is good still

okay, then you could go for "Dropping out of school" by brad sucks or "making me nervous" by brad sucks

electronic, fabulous beat, not fabulous band name/song title =)

uh...is it by the right band? I've never watched the music video.

u should

not

yeah no

do you like 45K magic?

24K magic actually

How about a Bayes tag?

what's that

@innisfree show us the youtube vid

I've never listened to them

@innisfree physics.stackexchange.com/tags/probability/info probably would suffice

it's a song not a band

24K Magic is a song, and Bruno Mars is the artist

actually, listening to it I think I might've heard parts of it once

hmm, not so bad

@heather, listen to this one it's better:

okay, let me just finish up the song I'm listening too =)

different song also about magic

ok

[Division by zero] Ok after more than 5 hours, the main results are now here. Now to continue building structures

In short: The zero terms of division by zero algebras form a set of idempotents in the + structure, equipped with a natural one sided partial order dictated by the type of additive identities present

@KyleKanos hmm I guess.

cool wiki

This is why RPS magmas popped up as a result, because the rock paper scissors relation are also equpipped with a natural ordering determined by which elements dominante what

(although when doing that, we no longer have division by zero algebras)

We argued that all RPS magmas can be modelled by zero terms, hence binary division by zero provide a natural source of RPS magmas

@Mew, also a halfway decent song

back

gud songs ay

Kaumu how did the xams go?

i thought you said it was tmr the other day

that's ages away

y u even studying

oh someone did

some liar on here

wow

why?

what is this exam?

what's it for?

but i'm not ocel0

and he lost his voice

=)

@Kaumudi, what is this exam that you must study for 5 years?

^ what heather said

Kaumuuuuuu

It's midnight here

That's too complicated at midnight

that's mean

nowonder that dude got banned

oh i sthat it

o.0

lol

yeah i type too quick

too quick for my keyboard to understand

here is where the conversation starts

wow thanks heather :)

=P

what a champ

(::takes a bow::) thank you, thank you

=P

can u resit Kaumu

what if you have one bad day?

but you are a supergenius

but have the flu or something

wow

is this ur resit or first time

what did you get last time

so does that mean u have to go to a poor community

if you didn't resit?

it said in the earlier post that the exam determines what community you can be in

" I should mention, at this point, that there is "reservation" of seats in colleges for different sections of our society; the cutoff for communities that used to be below the poverty line are marginally lower than for a "better off section"."

@Mew, that's not what that means

that's saying that people below the poverty line don't have to score as well on the test to get into college

oh i see

@Kaumudi, come to America where you don't have to mess with crazy exams...=P

sorry, but that exam just sounds nuts

i'm sleep deprived Kaumu

I've been up really early with activities all day

so they get an advantage?

that's unfair

@Kaumudi, deep breath in...deep breath out...=)

so what degree do u want Kaumu?

in Aus, anyone can get a physics degree pretty much

because the cut off is so low

but few can get a medical degree

because the cut off is high

how come

it's just wat u want

y

parents?

which was...

how/why?

why did it change tho?

and to what did it change too?

(we're just peppering you with questions today, sorry)

Hi guys,. How do you show that ghost fields in non-abelian gauge theories must transform under the adjoint representation of the symmetry group?

@Kaumudi, then the humans around you are stupid for not being your friend. =)

how come?

@Kaumudi, too busy studying to interact with the rest of humanity? =)

Kaummu where r u?

oh, that makes sense.

Kaumu why did you repeat, was ur score not quite high enough for physics degree?

true

So what degree do you want to do @Kaumudi or is it secret?

Oh I feel special :D

aww

that's ages

hope so

trying to stay healthy

haha

yeah that's a good start

lol

i have an early morning tmr too, peeps visting

laterz all

@Mew, good night =)

goodnight :)

(it feels so weird to say that, it's morning here)

well you're basically 12 hrs ahead then, it's 8 AM here =P

any interesting physics problems you're currently working on?

@Kaumudi, hope too, yeah, want to keep going with my calculus studies. =)

oh, yeah

coldplay is good

but not the best, still good tho

no band is life to me

I love music

@Kaumudi, yeah! Calculus is really fun.

@Kaumudi, we need to fix this somehow =P

get together sometime, like in real life

not sure if that'll ever happen though

that would be cool, dunno if I can persuade my parents to go to India anytime soon though =)

and yeah, if you ever make to iowa, I'll try to figure something out to get us to meet up

though I'm not sure how my parents will respond too "yeah, I met this person on stack exchange..." XD

yes, that is indeed a good start

and we're both interested in physics/mathematics

we're both on the younger side of things

certainly not adults

ah, technicalities, who cares =P

yeah?

what does that even mean? xD

circular logic, if anything is.

enjoy coldplay!

right? always coming on at the wrong moments

geesh

always for the strangest things, too

worst are the political ads though

election time around here is madness

"x person is an idiot"

"no y person is an idiot"

makes me glad I don't really watch tv much

and for when election season is over

-_-

"In particular, we have shown that non-time orientable spacetimes all fail to be F quantum compatible"

Take that spacetimes

Apparently F-locality is the notion that for every point of a spacetime, there exists a globally hyperbolic neighbourhood such that the QFT algebra of the restriction of the algebra of the whole space is isomorphic to the algebra it has as a spacetime of its own

Oooh that paper also explains the terms of the Hadamard form

That is nice

Is anyone able to help with EM induction

This scenario: For a conducting bar sliding right along two rails, with a uniform magnetic field pointing into the page. Why is there a change in flux when the bar moves from left to right inside the field - surely flux is constant? It supports it by saying flux = BA where A = length of bar * distance moved right, I.e the area 'swept out', and so d(BA)/dt = d(Blx)/dt = Blv. I thought the area was the area of the coil inside field (length*width of coil), not the area swept out.

The flux is changing when you just slid into the uniform field from no field. When within the field the flux should stay constant

"Prove the following: If $ax=a$ for $a=0$ then $x=1$"

ax = a - given

a = a - recursive property

a $\neq$ 0 - given

then, uh, let's see

what property is it...

What is this algebraic structure, is it a ring, semiring, field, group?

then you could do x = a/a - division prop. of equality

is the identity in this structure unique, is 1 the two sided identity?

You are working in the reals?

@Secret, yup, just found out it is the multiplication inverse theorem

so then we can say that a/a = 1 - multiplication inverse theorem

ok then I see DHMO and co. have taken care of your question

and then finish it off by saying x = 1 - substitution property of equality

What on earth is the "multiplication inverse theorem"?

sweet, proven

@ACuriousMind

Yeah, that's...not a theorem.

basically the axiom: existence of multiplicative inverse

At least, no one refers to it as that

It's just a fact that reals have multiplicative inverses

Calling it a "theorem" seems rather ridiculous to me

and such inverses are unique (for reals)

O nvm

Especially since I don't think that really answers your question, @heather. Basically, you should think about how the operation "divide by a" is defined.

@ACuriousMind, should I say "a/a = 1 - fact that reals have multiplicative inverses" then? =)

but seriously though, DHMO and co also gave the def of division:

Okay, that is the answer :)

so what is the right name for the theorem?

or property or fact or whatever

Although I'll say that using \dfrac instead of \frac and no brackets is terrible TeX style ;P

@heather Why does it need a name? It's the existence of multiplicative inverses.

(::shrugs::) fair enough.

If you want a name, it's part of what makes the reals a so-called "field"

hmm, next problem, prove that $x^2-y^2 = (x-y)(x+y)$

well, we have a constant x and a constant y - given

and then if we have the expression $x^2 - y^2$ - given? I suppose that's given.

no, no, nevermind, maybe I'll do this a different way

we have a constant x and y, and the expression (x-y)(x+y) - given

and then $(x-y)(x+y) = x^2 + xy -xy - y^2$ - distributive property

and then $(x-y)(x+y) = x^2 - y^2$ - substitution property of equality

hmm, I think that proof makes sense.

Actually when you expand (x-y)(x+y) you also make use of the commutative property as -xy=-yx

(plus tons of other theorems such as (-1)x=x, although I am guessing your book does not need that level of treatment)

well, maybe it does, I dunno

I'm looking at Spivak's calculus

but then I just started proofs in geometry class, so I don't know if I should even attempt that level of detail.

Hi @ACuriousMind