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| http://dx.doi.org/10.1073/pnas.19.11.979 | DOI Listing |
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In the present contribution the algebra of color vision has been developed. This algebra is similar to that of spinors. In this formalism, white color corresponds to zero, and any color on color circle goes to complex number.
View Article and Find Full Text PDFBiregular classification of Fano 3-folds and Fano manifolds of coindex 3.
Proc Natl Acad Sci U S A
May 1989
Department of Mathematics, Nagoya University, Nagoya 464, Japan.
The Fano 3-folds and their higher dimensional analogues are classified over an arbitrary field k [unk] C by applying the theory of vector bundles (in the case B(2) = 1) and the theory of extremal rays (in the case B(2) >/= 2). An n-dimensional smooth projective variety X over k is a Fano manifold if its first Chern class c(1)(X) epsilon H(2)(X, Z) is positive in the sense of Kodaira [Kodaira, K. (1954) Ann.
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