Affine algebras

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  • We consider a specialization of an untwisted quantum affine algebra of type ADE at a nonzero complex number, which may or may not be a root of unity. The Grothendieck ring of its finite dimensional representations has two bases, simple modules and standard modules. We identify entries of the transition matrix with special values of “computable” polynomials, similar to Kazhdan-Lusztig polynomials. At the same time we “compute” q-characters for all simple modules. The result is based on “computations” of Betti numbers of graded/cyclic quiver varieties.

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  • Commutative algebra is the theory of commutative rings and their modules. Although it is an interesting theory in itself, it is generally seen as a tool for geometry and number theory. This is my point of view. In this book I try to organize and present a cohesive set of methods in commutative algebra, for use in geometry. As indicated in the title, I maintain throughout the text a view towards complex projective geometry. In many recent algebraic geometry books, commutative algebra is often treated as a poor relation. One occasionally refers to it, but only reluctantly.

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  • Spectrum of a Ring, Fiber products, Schemes over fields, Local Properties of Schemes, Representable Functors, Separated morphisms, Finiteness Conditions, Affine and proper morphisms,... As the main contents of the ebook "Algebraic geometry 1". Invite you to consult.

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  • This volume contains the Proceedings of the Workshop "Physics and Combinatorics" held at the Graduate School of Mathematics, Nagoya University, Japan, during August 21-26, 2000. The workshop organizing committee consisted of Kazuhiko Aomoto, Fumiyasu Hirashita, Anatol Kirillov, Ryoichi Kobayashi, Akihiro Tsuchiya, and Hiroshi Umemura.

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  • Invite you to consult the document content, "Space with functions" below. Contents of the document referred to the content you: Affine Varieties, Algebraic Varieties, Nonsingular Varieties, Sheaves, Divisors,... Hopefully document content to meet the needs of learning, work effectively.

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