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单词 Tangent Map
释义

Tangent Map

If , then the tangent map associated to is a Vector Bundle Homeomorphism (i.e., a Map between the Tangent Bundles of and respectively). Thetangent map corresponds to Differentiation by the formula

(1)

where (i.e., is a curve passing through the base point to in at time 0 with velocity ).In this case, if and , then the Chain Rule is expressed as
(2)

In other words, with this way of formalizing differentiation, the Chain Rule can be remembered by saying that``the process of taking the tangent map of a map is functorial.'' To a topologist, the form
(3)

for all , is more intuitive than the usual form of the Chain Rule.

See also Diffeomorphism


References

Gray, A. ``Tangent Maps.'' §9.3 in Modern Differential Geometry of Curves and Surfaces. Boca Raton, FL: CRC Press, pp. 168-171, 1993.


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更新时间:2024/11/15 2:18:01