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Jie Du
University of New South Wales
Infinitesimal quantum gln and little q-Schur algebras
Friday 11th June, 12:05-12:55pm,
Carslaw 373.
We first follow De Concini and Kac
to give a presentation for the infinitesimal quantum
gln, uk(n), and then reconstruct or
realize uk(n)
in two different ways following the Beilinson-Lusztig-MacPherson
geometric setting approach. Thus, we obtain three new
bases for uk(n). Then, we use
uk(n) to introduce the little q-Schur algebra uk(n,r)
as a subalgebra of the q-Schur algebra Uk(n,r). The symmetry
structure of a little q-Schur algebra is then investigated
through the construction of various bases of monomial, BLM and PBW
types for uk(n) and q-Schur algebras. We also obtain a
formula for the dimension of uk(n,r).
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