Talk:Nichols algebra

Regarding deletion and further-source-request
After the (uncommented) deletion-request of User:Assassin's Creed has been negatively commented by veteran User:Carrite and revoked by admin User:Metropolitan90, I'm remain still a bit confused, what was actually criticized?

The request was to provide more sources (currently 11), but I cannot think of a "target"...so if anyone feels, that any statement I wrote is not sufficiently referenced, PLEASE give me a hint which! I'll be more than happy to clearify.... Pacman 2.0 (talk)

Request for further improvement assistance
Anyways (because an experienced opinion can only help) I have filed a general Request for feedback to improve the quality....I'm curious for new suggestions :-) Pacman 2.0 (talk)

Examples of Grana
I was not able to easily read through the rack-papers of Grana (just started to learn these), but I understand, there's more examples oer nonabelian groups there, somewhat of semidirect-prodcut type?

On the other hand, I'll be happy to do the new rank-2-example in HeckenbergerSchneider2010 more thoroughly Pacman 2.0 (talk)

Details on the Classification
Please add some ostensive details on the classification by Heckenberger (the "clue" about the Lyndon words and Binary trees) and the root system in the nonabelian case, as well as more details on the negative criteria especially for sporadic groups (if I got some time I will do the latter myself ;-) ) — Preceding unsigned comment added by Pacman 2.0 (talk • contribs) 10:52, 11 July 2011 (UTC)

A "q-diagram" picture?
Can anyone provide a picture of the "q"-diagrams, possibly also an non-Cartan one? Maybe one could ask the author himself for permission, or is this understood anyways for scientific articles? Pacman 2.0 (talk)

Nichols Original Reference
The only thorough reference on the equivalent characterizations I have is a paper of Schneider/Millinski, but can anyone provide the original source of Nichols? Pacman 2.0 (talk)

Portation from Braided Hopf algebras
I ported this topic from Braided Hopf algebras into an own article to give more references, examples etc. and briefly describe the new classification results by Root systems and Dynkin diagrams. Pacman 2.0 (talk)

Portal, Category, Rating?
I added this page was to Category:Hopf algebras and Portal:Mathematics was so bold to assume "Mid-priority", as this is the key part to the structure theory of Quantum groups (which is assigned "Mid priority" as well, because of their usage in noncommutative geometry, theoretical physics and pure algebra) along the methods Root systems and Dynkin diagrams known from classical Semisimple Lie algebras. The notion has been around since about 30 years and received new attention in all these subjects due to vast classification results with several international workgroups publishing. Objections? Pacman 2.0 (talk)