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secondary vector bundle structure : ウィキペディア英語版
secondary vector bundle structure
In mathematics, particularly differential topology, the secondary vector bundle structure
refers to the natural vector bundle structure on the total space ''TE'' of the tangent bundle of a smooth vector bundle , induced by the push-forward of the original projection map .
This gives rise to a double vector bundle structure .
In the special case , where is the double tangent bundle, the secondary vector bundle is isomorphic to the tangent bundle
of through the canonical flip.
== Construction of the secondary vector bundle structure ==
Let be a smooth vector bundle of rank . Then the preimage of any tangent vector in in the push-forward of the canonical projection is a smooth submanifold of dimension , and it becomes a vector space with the push-forwards
: +_
*:T(E\times E)\to TE, \qquad \lambda_
*:TE\to TE
of the original addition and scalar multiplication
:+:E\times E\to E, \qquad \lambda:E\to E
as its vector space operations. The triple becomes a smooth vector bundle with these vector space operations on its fibres.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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