I've been here before! I mean, I did try to set up

non-commutative algebra&geometry sites before and sooner or later

they always face the same basic problems :

a :

**dyspnoea** : one person does not have enough fresh ideas

to keep a mathematical site updated daily so that it continues to be of

interest (at least, I'm not one of those who can).

b :

**claustrophobia** : the topic of non-commutative algebra

& non-commutative geometry is too wide to be covered (cornered) by

one person. More (and differing) views are needed for balance and

continued interest.

c : **paranoia** : if one is

not entirely naive one has to exercise some restraint trying to protect

ones research plans (or those of students) so the most interesting ideas

never even get posted!

By definition, I cannot solve problems

a) and b) on my own. All I can hope is that, now that the basic

technological problems (such as including LaTeX-code in posts) are

solved, other people are willing to contribute. For this reason I

'depersonalized' this blog : I changed the title, removed all

personal links in the sidebar and so on. I want to open up this site

(but as I said, I've tried this before without much success) to

anyone working in non-commutative algebra and/or non-commutative

geometry who is willing to contribute posts on at least a monthly basis

(or fortnightly, weekly, daily…) for the foreseeable future. At

the moment the following 'categories' of posts are available

(others can be added on request) :

- courses : if you want

to tell about your topic of interest in small daily or weekly pieces. - columns : if you want to ventilate an opinion on something

related (even vaguely) to na&g. - nc-algebra : for anything

on non-commutative algebra not in the previous categories. - nc-geometry : for anything on non-commutative geometry not in the

previous categories. - this blog : for suggestions or

explanations on the technology of this site.

Mind you,

I am **not** looking for people who seek a forum to post

their questions (such people can still add questions as comments to

related posts) but rather for people active in na&g with a personal

opinion on relevance and future of the topic.

If you are

interested in contributing, please email me and we will work

something out. I'll also post information for authors (such as, how

to include tex, how to set restrictions etc.) in a _sticky_ post

soon.

Now, problem c) : in running sites for our master class

on noncommutative geometry I've noticed that some people are more

willing to post lectures notes etc. if they know that there is some

control on who can download their material. For this reason there will

be viewing restrictions on certain posts. Such posts will get a

padlock-sign next to them in the 'recent posts' sidebar (they

will not show up in your main page, if you are not authorized to see

them). I will add another sticky on all of this soon. For now, if you

would only be willing to contribute if there was this safeguard, rest

assured, it will be there soon. All others can of course already sign-up

or wait whether any of these plans (resp. day-dreams) ever work

out….

**update (febr 2007)** : still waiting

but the padlock idea is abandoned.