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Volumina der Zariski-Kammern algebraischer Flächen
Der Big-Kegel einer algebraischen Fläche besitzt eine natürliche Zerlegung in Teilkegel, die sogenannten Zariski-Kammern, die bemerkenswerte Eigenschaften bezüglich der in den Kammern enthaltenen Linearsystemen hat. Diese Zerlegung wurde bisher sowohl von einer geometrischen als auch von einer kombi...
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| Định dạng: | Dissertation |
| Ngôn ngữ: | Tiếng Đức |
| Được phát hành: |
Philipps-Universität Marburg
2012
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| Những chủ đề: | |
| Truy cập trực tuyến: | Bài toàn văn PDF |
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The big cone on a smooth algebraic surface decomposes naturally into Zariski chambers in a way which is most interesting when considering asymptotic invariants of linear series. This decomposition has so far been studied from a geometric and from a combinatorial point of view. In the present thesis the picture is complemented with a metric perspective by introducing a notion of chamber volume and by giving necessary and sufficient conditions for the volume of a chamber to be finite. Furthermore, methods to inductively calculate chamber volumes are provided by first reducing the calculation of the volume of an arbitrary chamber to the calculation of volumes of nef cones on blow-downs and then giving an explicit formula for the calculation of such nef cone volumes in terms of nef cone volumes of surfaces obtained by blowing down additional exceptional curves. The presented method is used to explicitly calculate chamber volumes on del Pezzo surfaces and on blow-ups of the projective plane whose anticanonical bundle is big.