On affine-ruled irrational surfaces
β Scribed by Masayoshi Miyanishi
- Publisher
- Springer-Verlag
- Year
- 1982
- Tongue
- English
- Weight
- 818 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0020-9910
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
DEDICATED TO R. SRIDHARAN CONTENTS Introduction. 1. Background material. ## 2. General results on normal presentation. 3. Ampleness, base-point-freeness, and cohomology of line bundles on elliptic ruled surfaces. 4. Normal presentation on elliptic ruled surfaces. 5. Koszul algebras. References
## Abstract We prove the existence of canonical scrolls; that is, scrolls playing the role of canonical curves. First of all, they provide the geometrical version of Riemann Roch Theorem: any special scroll is the projection of a canonical scroll and they allow to understand the classification of s