Knot at Lunch on February 20 2008: Difference between revisions

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* The subject matter is not directly related to algebraic knot theory and/or knot theoretic algebra.
* The subject matter is not directly related to algebraic knot theory and/or knot theoretic algebra.
* It will cost us a week (a full week, not just the weekly meeting!).
* It will cost us a week (a full week, not just the weekly meeting!).
* We may find at the end that mathematically speaking, it was all a waste of time.
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==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 09:47, 23 February 2008

Knot at Lunch/Navigation 
Date(s) Link(s)
2010/02/22 ???
2010/01/20 Formal integration
2010/01/13 Combing wB
2010/01/06 Exponentiation in tder
2009/09/22 descending v-knots
2009/08/26 red over green v-tangles
2009/08/19 Polyak Algebra
2009/07/08 Immanants
2009/07/01 Alexander modules
2009/06/24 Alexander modules
2009/06/10 Alexander, PBW for A^w, class videos
2009/06/03 Low key
2009/05/06 Low key
2009/04/29 Winter on Ribbons
2009/04/22 Misc
2009/04/15 KV
2009/03/25 KV
2009/03/18 Peter Lee
2009/03/04 Kirby calculus
2009/02/25 Karene on Reidemeister-Schreier
2009/02/11 Dror on Trotter, Jana on Alexander
2009/02/04 Bracelets
2009/01/28 gl(N) chickens
2009/01/15 2D Gauss Diagrams, FiC
2009/01/08 S&G update and more
2008/12/11 Chu on Garside, II
2008/12/04 wZ is 1-1
2008/11/27 The Wen
2008/11/20 The Zoom Space
2008/11/13 Chu on Garside
2008/11/06 Z and GPV
2008/10/30 Peter Lee on EHKR
2008/10/23 Map of the Field
2008/09/25 Hirasawa on Open Books
2008/09/18 Odd Khovanov
2008/09/17 Categorification.m
2008/09/11 More wAlex
2008/09/03 ?
2008/08/27 Dexp and BCH
2008/08/06 Z, A, det, tr, log
2008/07/30 Alexander Relations Marathon
2008/07/02 Peter Lee on horizontal Aw
2008/06/25 w-Alexander
2008/06 16-22 Thomas Fiedler Marathon
2008/06/11 ?
2008/06/04 Dylan Thurston
2008/05/28 Welded Tangles
2008/05/21 Bruce, Lucy
2008/04/23 Welded Knots
2008/04/16 Quandles and Lie algebras
2008/04/09 No-div Alekseev-Torossian
2008/04/02 Knotted Kung Fu Pandas
2008/03/26 Homotopy invariants
2008/03/19 Infinitesimal Artin
2008/03/12 Infinitesimalization of Artin
2008/03/05 Krzysztof Putyra on Odd Khovanov Homology
2008/02/27 Karene Chu on Proof of Artin
2008/02/20 Organizational, Hecke algebras
2008/02/13 Exponential and Magnus expansions
2008/02/06 cancelled
2008/01/30 Artin's theorem
2008/01/16 Hutchings' work, 2
2008/01/09 Hutchings' work, 1
2007/12/12 Bone soup
2007/12/05 Expansions
2007/11/28 Quantum groups
2007/11/21 Surfaces and gl(N)/so(N)
2007/11/07 Expansions for Groups
2007/10/31 Louis Leung on bialgebra weight systems
2007/10/24 Zsuzsi Dancso, continued
2007/10/17 Jana Archibald on the multivariable Alexander
2007/10/10 Zsuzsi Dancso on diagrammatic su(2)
2007/10/03 Hernando Burgos on alternating tangles
2007/09/26 Peter Lee on homology
2007/09/06 Garoufalidis' visit
2007/08/30 Art and enumeration
2007/08/23 My Hanoi talk?
2007/08/16 Lie bialgebra weight systems and more
2007/07/19 Subdiagram formulas
2007/07/12 Playing with Brunnians
2007/07/05 Virtualization
2007/06/28 Virtual braids
2007/06/07 Virtual knots
2007/05/31 Social gathering
2007/05/24 Lee on Frozen Feet

Invitation

Dear Knot at Lunch People,

We will have our next lunch on Wednesday February 20, 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. We will also need to decide whether we want to hold a "Thomas Fiedler Marathon" for a week sometime in June, for work in the spirit of the page "Dror Bar-Natan: Odds, Ends, Unfinished: Some One Parameter Knot Theory Computations"; if you want to know what this means, you'll have to come to lunch on time, for this will likely be the first topic we will discuss!

Further information about this meeting will/may appear at https://drorbn.net/drorbn/index.php?title=Knot_at_Lunch_on_February_20_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.

The Proposed Thomas Fiedler Marathon

For Against
  • We'll learn about his "one-parameter knot theory".
  • We'll get some practical Hecke algebra experience, and gain faster HOMFLY programs.
  • We'll get to play a bit with knot-theoretic programming.
  • We'll get to experiment with instant math logging.
  • We may discover something new.
  • The subject matter is not directly related to algebraic knot theory and/or knot theoretic algebra.
  • It will cost us a week (a full week, not just the weekly meeting!).
  • We may find at the end that mathematically speaking, it was all a waste of time.
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