Knot at Lunch on February 13 2008: Difference between revisions

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As always, please bring brown-bag lunch and fresh ideas. The agenda: we may talk a bit about the infinitesimal side of Artin's theorem, or we may talk about something else.
As always, please bring brown-bag lunch and fresh ideas. The agenda: we may talk a bit about the infinitesimal side of Artin's theorem, or we may talk about something else.


Further information about this meeting will/may appear at <span class="plainlinks">[{{SERVER}}/drorbn/index.php?title={{PAGENAMEE}} {{SERVER}}/drorbn/index.php? title={{PAGENAMEE}}]</span>.
Further information about this meeting will/may appear at <span class="plainlinks">{{SERVER}}/drorbn/index.php?title={{PAGENAMEE}}</span>.


As always, if you know anyone I should add to this mailing list or if you wish to be removed from this mailing list please let me know. To prevent junk accumulation in mailboxes, I will actively remove inactive people unless they request otherwise.
As always, if you know anyone I should add to this mailing list or if you wish to be removed from this mailing list please let me know. To prevent junk accumulation in mailboxes, I will actively remove inactive people unless they request otherwise.
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Dror.
Dror.

==Possible Agenda==

* Infinitesimal Artin - derivations on free Lie algebras.
** Derivations, tangential derivations, special derivations (see {{BBS Link|Alekseev-080116-162451.jpg}}).
** Drinfel'd's theorem on special derivations (see Drinfel'd's ''On quasitriangular Quasi-Hopf algebras and a group closely connected with <math>\operatorname{Gal}(\bar{{\Bbb Q}}/{\Bbb Q})</math>'', Leningrad Math. J. '''2''' (1991) 829-860, though I wouldn't be surprised if the theorem is actually older).
** Can you prove that <math>{\mathcal A}^\mbox{hor}</math> injects into <math>{\mathcal A}^\mbox{trees}</math>?
** The VS structure on several kinds of algebras of derivations. As always, can you find associators?
** The Alekseev-Torossian "divergence" ({{BBS Link|Alekseev-080121-093327.jpg}}).

Latest revision as of 10:04, 15 February 2008

Invitation

Dear Knot at Lunch People,

We will have our next lunch on Wednesday February 13, at the usual place, Bahen 6180, at 12 noon.

As always, please bring brown-bag lunch and fresh ideas. The agenda: we may talk a bit about the infinitesimal side of Artin's theorem, or we may talk about something else.

Further information about this meeting will/may appear at https://drorbn.net/drorbn/index.php?title=Knot_at_Lunch_on_February_13_2008.

As always, if you know anyone I should add to this mailing list or if you wish to be removed from this mailing list please let me know. To prevent junk accumulation in mailboxes, I will actively remove inactive people unless they request otherwise.

Best,

Dror.