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If you recognize where this picture was
taken, you will know that I\’m back from France. If you look closer you
will see two bikes, my own Bulls mountainbike
in front and Stijn\’s
lightweight bike behind.
If you see the relative position of the
saddles, you will know that Stijn is at least 20 cm taller. Let me add
that he is also at least 20 yrs. younger and 20 kgs. stronger and it
will be clear that I had a hard (but fun) time trying to follow him
uphill. Btw. this picture (and the next dozen or so) was taken by Jan and I\’ll try to add the next
days a couple of shots he likes more.

Since then I\’ve been
writing up a paper which I hope will be ready to put online by
september. It\’s all about using non-commutative geometry to construct
representations of arithmetic groups, a bit like the Granada Notes but with a dash of
Double Poisson
Algebras
to it.

A positive outcome of this short break is
a renewed interest in the NeverEndingBooks project, but more on this
later. For now, let me just add that Raf
decided to feed my noncommutative geometry@n (version 2)
to a printing on demand publisher. So, if you want a perfect bound
paperback version of it (for 12 Euro approx.) you\’d better email him at once (at the
moment he will order just 5 copies).

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markLaTeXdown

Clearly,
an extended version of Markdown
including LaTeX-commands would be useful for mathematicians and surely
I’m not the first to think about this. In fact, I found a somewhat
pompous text New adventures
if hifi text
by someone claiming to have done precisely that (though
he doesn’t give much details nor post a version of his altered program).

Still, it is pretty clear how to convert a _Markdown+LaTeX_
textfile to plain LaTeX (at least for regex-lovers
). Modify the _Markdown.pl_ script so that the Markdown markup is
translated not to HTML-tags but to LaTeX-commands.

More
interesting material can be found in a thread on _Markdown and
Mathematics_ starting with this post. In it, they search for a good way to include
LaTeX-mathematical commands in a MarkDown text. In fact, this is part of
a more general quest for a good _escape character_ in Markdown to
create _Markdown plus something_ versions. They opt for
{{ and }} rather than the usual
$ signs.

I think the alternatives [
tex ]
and [ /tex ] are slightly better because
then you could feed the text to a functional WordPress installation with the
LaTeXRender
plugin installed and copy the relevant part from the HTML-source of
the resulting post to get a HTML-version of the mathematical text with
all LaTeX-code converted to pictures. Clearly, typing the suggested tags
is somewhat cumbersome so I would type them using the
{{ and }} proposal (one
{ is not enough because a lot a LaTeX code uses single
curly brackets) and then do a global replace to get the
LaTeXRender-tags.

Even more interesting would be to have a
version of the html2txt.py script for LaTeX, that is,
converting a LaTeX-file to Markdown + LaTeXcode which would give an easy
way to convert your existing papers to HTML if you feed the LaTeXRender
plugin with all the required newcommands and packages.

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hectic days

Hectic
days ahead! Today, there is the Ph.D. defense of Stijn Symens and the
following two days there is a meeting in Ghent where Jacques
Alev and me organize a special session on non-commutative algebra. Here
is the programme of that section

Session 1 (Friday 20 May)
— chair : Jacques Alev (Univ. Reims)

15.30-16.25 : Iain Gordon (Glasgow, United
Kingdom) : “Rational Cherednik algebras and resolutions of
symplectic
singularities”

16.25-16.35 : break

16.35-17.30 : Olivier Schiffmann (ENS Paris, France) :
“Elliptic Hall algebras and spherical Cherednik algebras”

Session 2 (Saturday 21 May) — chair : Lieven Le Bruyn
(Univ. Antwerp)

14.30-15.15 : Markus
Reineke
(Munster, Germany) : “Geometry of Quiver Moduli”

15.15-16.00 : Raf Bocklandt &
Geert Van de Weyer
(Antwerp, Belgium) : “The power of slicing in noncommutative
geometry”

Afterwards it will be time to take a short
vacation (and do some cycling in the French mountains). Here is my
reading list for next week :

The dark Eye – Ingrid
Black
: Simply because I read her previous novel The dead

Brass – Helen Walsh : I
read the first 3 or 4 pages in the shop and couldn\’t stop …

Fleshmarked Alley – Ian
Rankin
: Hey, it\’s vacation!

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