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math.QA2008★ 23 cited
Feynman graphs, rooted trees, and Ringel-Hall algebras
Kobi Kremnizer, Matthew Szczesny
We construct symmetric monoidal categories $\LRF, \FD$ of rooted forests and Feynman graphs. These categories closely resemble finitary abelian categories, and in particular, the n…
math.QA2004
Quantum flag varieties, equivariant quantum D-modules and localization of quantum groups
Erik Backelin, Kobi Kremnizer
Let $\Oq(G)$ be the algebra of quantized functions on an algebraic group and $\Oq(B)$ its quotient algebra corresponding to a Borel subgroup of . We define the category…