Let \(R\) be a commutative noetherian ring and let \(I\) be an ideal of \(R\left[x_{1}, \ldots, x_{n}\right]=R[x]\). The morphism \(\psi: R \longmapsto R[x] / I\) defines a family of algebraic varieties as follows: Let \(p\) be a prime ideal of \(R\) (or an element of \(\operatorname{Spec} R\) ) and
Projections of generic surfaces of revolution
โ Scribed by J. H. Rieger
- Publisher
- Springer
- Year
- 1993
- Tongue
- English
- Weight
- 899 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0046-5755
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๐ SIMILAR VOLUMES
A b s t r a c t . Let. A' P N = P i be a subvariety of dimension n and A P N be a generic linear subspace of dimension Nk -1 with k 2 n. Then the linear projection TI\ : X -+ P' is a finite map. Let R(x,j) be its ramification locus. In this paper we study the map from the Grassmannian G ( Nk -1, N )
Algorithms are developed for approximation of surfaces of revolution by parts of cones and cylinders. The method can be extended to other surfaces generated by moving a planar curve. The main idea is to use the offset curves with an offset ฯฎ of a given planar curve for controlling the approximation