On two geometric constructions of U( sl n ) and its representations

@article{Savage2006OnTG,
  title={On two geometric constructions of U( sl n ) and its representations},
  author={Alistair Savage},
  journal={Journal of Algebra},
  year={2006},
  volume={305},
  pages={664-686}
}
QUIVER VARIETIES AND BEILINSON-DRINFELD GRASSMANNIANS OF TYPE A
We construct Nakajima's quiver varieties of type A in terms of conjugacy classes of matrices and (non-Slodowy's) transverse slices naturally arising from affine Grassmannians. In full generality
Weyl group action on weight zero Mirković-Vilonen basis and equivariant multiplicities
Lectures on geometric realizations of crystals
These are notes for a lecture series given at the Fields Institute Summer School in Geometric Representation Theory and Extended Affine Lie Algebras, held at the University of Ottawa in June 2009. We

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TLDR
This book discusses K-Theory, Symplectic Geometry, Flag Varieties, K- theory, and Harmonic Polynomials, and Representations of Convolution Algebras.
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