Focal Loci of Algebraic Varieties I
The focal locus $\Sigma_X$ of an affine variety $X$ is roughly speaking the (projective) closure of the set of points $O$ for which there is a smooth point $x \in X$ and a circle with centre $O$ passing through $x$ which osculates $X$ in $x$. Algebraic geometry interprets the focal locus as the bran...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2000
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