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This tag is used if a reference is needed in a paper or textbook on a specific result.

3 votes

What is $\left[ \begin{array}{c} K_i;0\\ \ell\\ \end{array} \right] _{\varepsilon _i}$ in th...

You are correct and your observation is precisely the point. It is all about choices. You define the K-symbol as an element in the quantum group over $\mathbb{Q}(q)$. At a later point you more or less …
Simon Lentner's user avatar
2 votes
1 answer
208 views

Simplicial complex made of central idempotents of an algebra

Let $A$ be an algebra, say over $\mathbb{C}$ and finite-dimensional, but not necessary semisimple. I have the strong feeling, which I would like to prove and use, about the following rather natural ap …
10 votes
Accepted

2-cocycle twists of braided Hopf algebras

The two concepts - twisting a Hopf algebra one-sided to an algebra and two-sided to a new Hopf algebra - are actually intimately connected and play an important role in several areas of current resear …
Simon Lentner's user avatar
1 vote

Commutator table for Chevalley group G_2

At first: sorry, I could't find the source you were looking for, but I'm so free to sketch two ways how you in my opinion get very fast to the informations you need (especially the latter, generic, mi …
Simon Lentner's user avatar
2 votes

Analysis and finitely generated groups

One special case of groups, where one certainly gets rather quickly explicit and nontrivial expressions should be finite or affine Coxeter groups, that are finite/infinite and defined by involution ge …
Simon Lentner's user avatar