Download Analysis and Algebra on Differentiable Manifolds: A Workbook by Pedro M. Gadea, Jaime Muñoz Masqué, Ihor V. Mykytyuk PDF

By Pedro M. Gadea, Jaime Muñoz Masqué, Ihor V. Mykytyuk

This is the second one version of this top promoting challenge e-book for college students, now containing over four hundred thoroughly solved routines on differentiable manifolds, Lie idea, fibre bundles and Riemannian manifolds.

The workouts pass from common computations to particularly refined instruments. some of the definitions and theorems used all through are defined within the first element of each one bankruptcy the place they appear.

A 56-page number of formulae is integrated which might be priceless as an aide-mémoire, even for lecturers and researchers on these topics.

In this 2d edition:
• seventy six new difficulties
• a piece dedicated to a generalization of Gauss’ Lemma
• a quick novel part facing a few homes of the strength of Hopf vector fields
• an increased selection of formulae and tables
• a longer bibliography

Audience

This ebook should be beneficial to complicated undergraduate and graduate scholars of arithmetic, theoretical physics and a few branches of engineering with a rudimentary wisdom of linear and multilinear algebra.

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Extra resources for Analysis and Algebra on Differentiable Manifolds: A Workbook for Students and Teachers

Sample text

Ii) Let ϕ : [0, 2π] × (−1, 1) → R3 be the map given by ϕ(u, v) = 2 − v sin u u u sin u, 2 − v sin cos u, v cos . 2 C ∞ Manifolds 19 Note that the restriction of ϕ to (0, 2π) × (−1, 1) coincides with the first parametrisation. Moreover, it is easy to see that im ϕ coincides with the Möbius strip. Let α : [0, 1] × R → [0, 2π] × (−1, 1) be the homeomorphism given by α(s, t) = (2πs, (2/π) arctan t). Set ψ = ϕ ◦ α. Let (s1 , t1 ), (s2 , t2 ) ∈ [0, 1] × R be two distinct points such that ψ(s1 , t1 ) = ψ(s2 , t2 ).

Prove that L has zero measure. 36 1 Differentiable Manifolds Fig. 18 The graph of the map t → (t 2 , t 3 ) Solution Let dim L = k n − 1. Consider the map f : Rk → Rn , f x 1 , x 2 , . . , x k = x i ei , where {ei } is a basis of L. By virtue of Sard’s Theorem, f (Rk ) = L has zero measure. 56 Let M1 and M2 be two C ∞ manifolds. Give an example of differentiable mapping f : M1 → M2 such that all the points of M1 are critical points and the set of critical values has zero measure. Solution Let f : M1 → M2 defined by f (p) = q, for every p ∈ M1 and q a fixed point of M2 .

To check it, let p, q ∈ R2 , p = q (see Fig. 19, right). We have / L, q ∈ / L}. Up ∩ Uq = {L ∈ M : p ∈ To see that ϕp (Up ∩ Uq ), which is the domain of the map ϕq ◦ ϕp−1 , is an open subset of Ap , we shall prove that its complementary is a closed subset. Let x be a point in its complementary subset, that is, such that x does not belong to the domain of ϕq ◦ ϕp−1 . Then, either x does not belong to the domain of ϕp−1 , which is Ap , that is, x = p; or contrarily x = p, but ϕp−1 (x) does not belong to the domain of ϕq , that is, to Uq .

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