Some homotopy of stunted complex projective space
نویسندگان
چکیده
منابع مشابه
Pseudo Ricci symmetric real hypersurfaces of a complex projective space
Pseudo Ricci symmetric real hypersurfaces of a complex projective space are classified and it is proved that there are no pseudo Ricci symmetric real hypersurfaces of the complex projective space CPn for which the vector field ξ from the almost contact metric structure (φ, ξ, η, g) is a principal curvature vector field.
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We prove the following two new optimal immersion results for complex projective space. First, if n 3 mod 8 but n 6 3 mod 64, and (n) = 7, then CP can be immersed in R 4n 14 . Second, if n is even and (n) = 3, then CP can be immersed in R 4 . Here (n) denotes the number of 1's in the binary expansion of n. The rst contradicts a result of Crabb, which said that such an immersion does not exist, a...
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Let V be a 2m-dimensional vector space over a field F (m ≥ 2) and let k ∈ {1, . . . , 2m − 1}. Let A2m−1,k denote the Grassmannian of the (k − 1)-dimensional subspaces of PG(V ) and let egr denote the Grassmann embedding of A2m−1,k into PG( ∧k V ). Let S be a regular spread of PG(V ) and let XS denote the set of all (k − 1)-dimensional subspaces of PG(V ) which contain at least one line of S. T...
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ژورنال
عنوان ژورنال: Illinois Journal of Mathematics
سال: 1969
ISSN: 0019-2082
DOI: 10.1215/ijm/1256053752