By Paul S. Aspinwall et al.

ISBN-10: 0821838482

ISBN-13: 9780821838488

Participants: Paul S. Aspinwall, Tom Bridgeland, Alastair Craw, Michael R. Douglas, Mark Gross, Anton Kapustin, Gregory W. Moore, Graeme Segal, Balazs Szendroi, and P.M.H. Wilson

Research in string conception over the past numerous a long time has yielded a wealthy interplay with algebraic geometry. In 1985, the creation of Calabi-Yau manifolds into physics in order to compactify ten-dimensional space-time has ended in fascinating cross-fertilization among physics and arithmetic, specially with the invention of replicate symmetry in 1989. a brand new string revolution within the mid-1990s introduced the suggestion of branes to the leading edge. As foreseen by way of Kontsevich, those became out to have mathematical opposite numbers within the derived type of coherent sheaves on an algebraic sort and the Fukaya class of a symplectic manifold.

This has resulted in interesting new paintings, together with the Strominger-Yau-Zaslow conjecture, which used the speculation of branes to suggest a geometrical foundation for reflect symmetry, the idea of balance stipulations on triangulated different types, and a actual foundation for the McKay correspondence. those advancements have resulted in loads of new mathematical work.

One hassle in knowing all features of this paintings is that it calls for with the ability to converse assorted languages, the language of string thought and the language of algebraic geometry. The 2002 Clay tuition on Geometry and String idea got down to bridge this hole, and this monograph builds at the expository lectures given there to supply an up to date dialogue together with next advancements. A normal sequel to the 1st Clay monograph on replicate Symmetry, it offers the hot principles popping out of the interactions of string conception and algebraic geometry in a coherent logical context. we are hoping it's going to permit scholars and researchers who're accustomed to the language of 1 of the 2 fields to achieve acquaintance with the language of the other.

The booklet first introduces the proposal of Dirichlet brane within the context of topological quantum box theories, after which experiences the fundamentals of string conception. After displaying how notions of branes arose in string idea, it turns to an advent to the algebraic geometry, sheaf conception, and homological algebra had to outline and paintings with derived different types. The actual life stipulations for branes are then mentioned and in comparison within the context of reflect symmetry, culminating in Bridgeland's definition of balance constructions, and its purposes to the McKay correspondence and quantum geometry. The e-book maintains with targeted remedies of the Strominger-Yau-Zaslow conjecture, Calabi-Yau metrics and homological replicate symmetry, and discusses more moderen actual developments.

Titles during this sequence are co-published with the Clay arithmetic Institute (Cambridge, MA).

Readership

Graduate scholars and examine mathematicians drawn to mathematical elements of quantum box conception, particularly string conception and replicate symmetry.

This publication is appropriate for graduate scholars and researchers with both a physics or arithmetic history, who're attracted to the interface among string idea and algebraic geometry.

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**Additional resources for Dirichlet Branes and Mirror Symmetry**

**Sample text**

We shall now survey a few kinds of examples by way of illustration, sometimes giving only a sketch of the details. The most general target category we can consider is a symmetric tensor category: clearly we need a tensor product, and the axiom HY1 ⊔Y2 ∼ = H Y1 ⊗ HY2 only makes sense if there is an involutory canonical isomorphism HY1 ⊗ H Y2 ∼ = H Y2 ⊗ H Y1 . , vector spaces V with a mod 2 grading V = V 0 ⊕V 1 , where the canonical isomorphism V ⊗ W ∼ = W ⊗ V is v ⊗ w → (−1)deg v deg w w ⊗ v. One can also consider the category of Z-graded vector spaces, with the same sign convention for the tensor product.

Thus when d = 2 the objects of the geometric category are disjoint unions of circles and oriented intervals with labelled ends. A functor from this category to complex vector spaces which takes disjoint unions to tensor products will be called an open and closed topological field theory: such theories will give us a “baby” model of the theory of D-branes. , so that it is a cobordism from the point b to the point a, and NOT the other way round). a a b c b c Figure 1. Basic cobordism on open strings.

Associativity, commutativity, and unit constraints in the closed case. The unit constraint requires the natural assumption that the cylinder correspond to the identity map C → C. boundary circle being the incoming closed circle, while the other boundary circle is subdivided into an outgoing interval and an interval of constrained boundary. 4. Sewing theorem. Geometrically, any oriented surface can be decomposed into a composition of morphisms corresponding to the basic data defining the Frobenius structure.

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Categories: Algebraic Geometry