Questions tagged [klr-algebras]

Questions about the Khovanov-Lauda-Rouquier algebras. These algebras are used in particular to categorify the representations of universal enveloping algebras of semi-simple Lie algebras

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Homogenous Hermitian form on the KLR algebra

Does there exist a homogenous conjugate-linear automorphism of the KLR algebra? I want to be able to define a homogenous Hermitian form on the (Specht) modules of the (cyclotomic) KLR algebra.
7
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0answers
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Trace on a KLR algebra

The cyclotomic KLR algebra is isomorphic to the Ariki-Koike algebra over a field and so admits a trace (this is used in Hu-Mathas' paper to define bases for the KLR algebra corresponding to Murphy and ...
2
votes
0answers
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Signs in relations of Brundan--Kleshchev versus Khovanov--Lauda

The following relations in the definition of the quiver Hecke algebra in Brundan--Kleshchev's paper are $$ y_r \psi_r e(\underline{i}) =(\psi_r y_{r+1} - \delta_{i_r,i_{r+1}})e(\underline{i});\\ $$ ...
14
votes
2answers
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Where does the canonical basis differ from the KLR basis?

The question implicitly asked in Ben Webster's question is: Does the canonical basis of Uq(n+) agree with the basis coming from categorification via Khovanov-Lauda-Rouqier algebras? Thanks to ...
1
vote
1answer
618 views

Are cyclotomic Khovanov-Lauda-Rouquier algebras symmetric?

Recall that for k a field, a finite dimensional k-algebra A is called symmetric if it is isomorphic to its dual as a bimodule of itself. Which is to say, there's a trace map t:A -> k such that t(ab)=...