Download Applications of Algebraic Geometry to Coding Theory, Physics by I. Burban, Yu. Drozd, G.-M Greuel (auth.), Ciro Ciliberto, PDF

By I. Burban, Yu. Drozd, G.-M Greuel (auth.), Ciro Ciliberto, Friedrich Hirzebruch, Rick Miranda, Mina Teicher (eds.)

An updated file at the present prestige of significant examine subject matters in algebraic geometry and its functions, comparable to computational algebra and geometry, singularity conception algorithms, numerical ideas of polynomial structures, coding thought, verbal exchange networks, and computing device imaginative and prescient. Contributions on extra basic facets of algebraic geometry contain expositions relating to counting issues on kinds over finite fields, Mori idea, linear platforms, Abelian kinds, vector bundles on singular curves, degenerations of surfaces, and reflect symmetry of Calabi-Yau manifolds.

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Extra resources for Applications of Algebraic Geometry to Coding Theory, Physics and Computation

Example text

K :::; 2j1, or j1F 2 - F . K :::; 2. Subtracting F2 - F . Ks = 2 from this inequality gives (j1 - 1)F2 :::; 0.

Form of [-fi(p':l \ , ... , p;;l/l) on S is the complete linear system L := IdH I1IIEI - ... - I1InEnl. By abusing notation, we will denote by L also the line bundle associated to this linear system. We apply the language of virtual and expected dimension to the linear system Lei (p';l \, .... p~l/1) on the plane also, by using the corresponding notions of the proper transform. In particular. the virfual dimension of Lei (p~11 , ... ( PI1111 . ,') = d(d+3) _ £... ~ l1Ii(l1Ii+ 1) v( LJc/ n 2 r (1111 III ) · .

17 C. Ciliberto et al. ), Applications of Algebraic Geometry to Coding Theory. Physics and Computation, 17-22. © 2001 Kluwer Academic Publishers. 18 A. CALABRI Therefore it seems interesting to attack with similar techniques also the problem of birational classification of double planes which are not rational, partially answered in the past only by Enriques, though with arguments that sometimes appear rather obscure and difficult to us. e. non-rational double planes with Kodaira dimension -00) are easily classified by applying a theorem of De Franchis and the birational classification of pencils of rational plane curves.

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