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Article10.4064/fm_1999_161_1-2_1_225_233

The order of the Hopf bundle on projective Stiefel manifolds

Parameswaran Sankaran,Peter Zvengrowski-1999-01-01-Fundamenta Mathematicae
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TL;DRAbstract

The projective Stiefel manifold X n,k has a canonical line bundle ξ n,k , called the Hopf bundle. The order of cξn, the complexification of ξn,k,as an element of (the abelian group) K(X n,k ), has been determined in [3], [5], [6]. The main result in the present work is that this order equals the order of ξn,k itself, as an element of KO(X n,k ), for n≡0,±1 (mod 8), or for is in the upper range for n (approximately k ≥ n/2). Certain applications are indicated.

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The projective Stiefel manifold X n,k has a canonical line bundle ξ n,k , called the Hopf bundle. The order of cξn, the complexification of ξn,k,as an element of (the abelian group) K(X n,k ), has been determined in [3], [5], [6]. The main result in the present work is that this order equals the order of ξn,k itself, as an element of KO(X n,k ), for n≡0,±1 (mod 8), or for is in the upper range for n (approximately k ≥ n/2). Certain applications are indicated.

Keywords

MathematicsLine bundleAbelian groupOrder (exchange)BundlePure mathematicsProjective testCanonical bundle

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