Read e-book online Chern Numbers And Rozansky-witten Invariants Of Compact PDF

By Marc Nieper Wibkirchen

ISBN-10: 9812388516

ISBN-13: 9789812388513

ISBN-10: 9812562354

ISBN-13: 9789812562357

This particular publication offers with the idea of Rozansky-Witten invariants, brought via L Rozansky and E Witten in 1997. It covers the most recent advancements in a space the place learn continues to be very energetic and promising. With a bankruptcy on compact hyper-Kähler manifolds, the ebook contains a unique dialogue at the functions of the overall thought to the 2 major instance sequence of compact hyper-Kähler manifolds: the Hilbert schemes of issues on a K3 floor and the generalized Kummer forms.

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Further, if no cyclic ordering at a trivalent vertex is marked in the Graph homology 41 drawn diagram, we mean the cyclic ordering given by the counter-clockwise ordering of the flags induced by the drawing. 5) actually depict the same. 4 (Marked Jacobi diagram) Let I be a finite set. e. a bijection of the set of its legs to I . An isomorphism of marked Jacobi diagrams over I is given by an isomorphism of the underlying Jacobi diagrams that respects the given bijections of their set of legs to I .

12 (Equivalence relations) Every ideal ( A I ) I induces a n equivalence relation: y and yl in 31for a finite set I are equivalent modulo (AI)I i f they project t o the same element in the quotient space JI/AI. 10 (Induced submodules) Let (AI)I be an ideal (or more generally a subspace of the space of Jacobi diagrams). Let A be the smallest k[O]-submodule in J’ such that for every finite set I the image of AI under the forgetful map 3 1 4 J’ is a submodule of A . We say that the submodule A is induced by (AI)I.

5 (“Local Torelli”) The period map P : Def(X) the universal deformation X -+Def(X) is a local isomorphism. Proof. 2 --+ Q x of 0 See [Beauville (1983)l. A v a n i s h i n g result for p o l y n o m i a l s on H2 Let X be a differentiable manifold. Let Cx be the set of classes [a]E H2(X,C ) such that there exists a structure of an irreducible holomorphic symplectic manifold on X for which a is the cohomology class of its symplectic form. 21 (A vanishing result) The Zarislci closure of {a 8 : a E Cx} is either empty or the whole second cohomology group H2(X,C ) .

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Chern Numbers And Rozansky-witten Invariants Of Compact Hyper-kahler Manifolds by Marc Nieper Wibkirchen

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Categories: Algebraic Geometry