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http://dx.doi.org/10.4134/BKMS.2007.44.1.083

A CERTAIN PROPERTY OF POLYNOMIALS AND THE CI-STABILITY OF TANGENT BUNDLE OVER PROJECTIVE SPACES  

Tanaka, Ryuichi (Department of Liberal Arts Faculty of Science and Technology Tokyo University of Science Noda)
Publication Information
Bulletin of the Korean Mathematical Society / v.44, no.1, 2007 , pp. 83-86 More about this Journal
Abstract
We determine the largest integer i such that $0 is odd in the polynomial $(1+t+t^{2}+{\cdots}+t^{n})^{n+1}$. We apply this to prove that the co-index of the tangent bundle over $FP^{n}$ is stable if $2^{r}{\leq}n<2^{r}+\frac{1}{3}(2^{r}-2)$ for some integer r.
Keywords
sphere bundle; $\mathbb{Z}_2-map$; co-index;
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