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simple group of order 2

The Klein Four Group is an a
capella group from the maths department of Northwestern. Below a link to
one of their songs (grabbed from P.P. Cook’s Tangent Space
).

Finite
Simple Group (of order two)

A Klein Four original by
Matt Salomone


The path of love is never
smooth
But mine’s continuous for you
You’re the upper bound in the chains of my heart
You’re my Axiom of Choice, you know it’s true
But lately our relation’s not so well-defined
And
I just can’t function without you
I’ll prove my
proposition and I’m sure you’ll find
We’re a
finite simple group of order two
I’m losing my
identity
I’m getting tensor every day
And
without loss of generality
I will assume that you feel the same
way
Since every time I see you, you just quotient out
The faithful image that I map into
But when we’re
one-to-one you’ll see what I’m about
‘Cause
we’re a finite simple group of order two
Our equivalence
was stable,
A principal love bundle sitting deep inside
But then you drove a wedge between our two-forms
Now
everything is so complexified
When we first met, we simply
connected
My heart was open but too dense
Our system
was already directed
To have a finite limit, in some sense

I’m living in the kernel of a rank-one map
From my
domain, its image looks so blue,
‘Cause all I see are
zeroes, it’s a cruel trap
But we’re a finite simple
group of order two
I’m not the smoothest operator in my
class,
But we’re a mirror pair, me and you,
So
let’s apply forgetful functors to the past
And be a
finite simple group, a finite simple group,
Let’s be a
finite simple group of order two
(Oughter: “Why not
three?”)
I’ve proved my proposition now, as you
can see,
So let’s both be associative and free
And by corollary, this shows you and I to be
Purely
inseparable. Q. E. D.

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a good day at the arxiv

The
arXiv is a bit like cable tv : on certain days there seems to be nothing
interesting on, whereas on others it’s hard to decide what to see in
real time and what to record for later. Today was one of the better
days, at least on the arXiv. Pavel Etingof submitted the
notes of a course he gave at ETH in the spring and summer of 2005 Lectures on
Calogero-Moser systems
. I always sympathize with people taking time
to explain what they are interested in to non-experts, especially if
they even take more time to write up course notes so that the rest of us
can also benefit from these talks. Besides, it is always more rewarding
to learn a topic from a key-figure such as Etingof, rather than sitting
through talks on this given by people who only embrace a topic as a
career move. However, as I’m no longer that much into Calogero-Moser
stuff I’ve put Pavel’s notes in recording mode as I definitely have to
spend some time getting through that other paper posted today : Notes on A-infinity
algebras, A-infinity categories and non-commutative geometry. I
by
Maxim
Kontsevich
and Yan
Soibelman
. They really come close to things that interest me right
now and although I’m not the greatest coalgebra-fan, they may give me
just enough reasons to bite the bullet. On a different topic : with
plenty of help from Jacques Distler, my
neverending planet
is now also serving MathML, but you need to view it using Firefox and
have all the required fonts
installed.

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neverending-planet

Mimicking Jacques Distler’s Planet Musings
I’ve set up a Neverending Planet
available from a header-link (and direct links from the
‘neverending planet’-section (the bit following the computers
photo)). I assume that Distler is a Mac guy too, so when he
said
that ‘Installation (of Planet) was a breeze’ I thought I
could pull it off easily, even in an off-tech phase… Not so.
Distler must be a heavier Python-user than I am (and that’s not
difficult, unless you mean the Monty version of it) because the default
system-delivered Python (2.3) did return error messages (something to do
with a bsddb thing, I didn’t take note). But then I installed MacPython which has
Python+stuff 2.4.3 as a _universal binary_ (!) and all went well.
I didn’t even tweak any of the files, so at the moment what you see is
the default output of ‘fancy’ Planet (maybe I’ll modify it when a
new tech-phase comes along). So far, I’ve subscribed to 38
math&physics blogs (a selection from my own blogroll and planet
musings) which I believe have occasionally something interesting for
mathematicians. But, if you know of an interesting blog I’ve missed drop me a line and I’ll add it
(it just take me two lines in the config.ini file). As for the
world-cup, I seem to have missed the best match so far (Germany-Costa
Rica) because I thought it would be at 9pm rather than 6pm when I’m
still cooking, eating and enjoying a hot evening… On the other
hand, I did enjoy the final 15minutes-thriller of Sweden –
Trinidad&Tobago (0-0). I never hoped so much for a draw and never
had such a good laugh after a 0-0 match. But then, as Leo Beenhakker
(the coach of T&T said) : “This isn’t mathematics, it’s
football!!”

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