By Rudolph, G. and Schmidt, M.
Ranging from undergraduate point, this ebook systematically develops the fundamentals of - research on manifolds, Lie teams and G-manifolds (including equivariant dynamics) - Symplectic algebra and geometry, Hamiltonian platforms, symmetries and aid, - Integrable platforms, Hamilton-Jacobi thought (including Morse households, the Maslov category and caustics). the 1st merchandise is proper for almost all components of mathematical physics, whereas the second one merchandise offers the root of Hamiltonian mechanics. The very last thing introduces to big exact components. invaluable history wisdom on topology is prov
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Additional info for Differential Geometry and Mathematical Physics: Part I. Manifolds, Lie Groups and Hamiltonian Systems
Since u ∈ V corresponds to the tangent vector Xv ∈ Tm M, represented by the curve t → γ (t) := v + tu, it is mapped by Φv as follows: u → Φv [γ ] = [Φ ◦ γ ] = d Φ(v + tu) = Φ (v) · u, dt 0 where Φ (v) denotes the ordinary derivative of mappings between open subsets of finite-dimensional real vector spaces. This shows that the notion of tangent mapping generalizes the notion of derivative of calculus in Rn . 5 Let M be a C k -manifold, let m ∈ M and let f ∈ C k (M). 3/1. Let Xm ∈ Tm M be represented by the curve γ .
For the same reason, all elements of M are critical points for Φ and hence all elements of Φ(M) are critical values of Φ. This yields the assertion. 1 Let M and N be C k -manifolds and let Φ ∈ C k (M, N ). Show that if M is connected and if Φm = 0 for all m ∈ M, Φ is constant. 11. 14. 16. 5 Let M, N and P be C k -manifolds and let Φ ∈ C k (M, N ) and Ψ ∈ C k (N, P ). Show the following. (a) If Φ is a submersion and Ψ is an immersion, then Ψ ◦ Φ : M → P has locally constant rank. ) (b) If, on the contrary, Φ is an immersion and Ψ is a submersion, then Ψ ◦ Φ need not have locally constant rank.
1) The assignment of f ◦ Φ to f defines a mapping Φ ∗ : C k (N ) → C k (M), Φ ∗ f := f ◦ Φ. 2) In this notation, we have Φm X m = X m ◦ Φ ∗ . 3 1. The mapping Φ ∗ is called the pull-back (of functions) by Φ. Later on, it will be generalized to differential forms. Φ ∗ is a homomorphism of algebras and satisfies id∗M = idC k (M) , (Ψ ◦ Φ)∗ = Φ ∗ ◦ Ψ ∗ for all Φ ∈ C k (M, N ) and Ψ ∈ C k (N, P ). 3) may be taken as the extension of the tangent mapping from Tm M to Dm M. 2. 2 we conclude that for local charts (U, κ) on M at m and (V , ρ) on N at Φ(m) one has Φm X m ρ,i φ(m) = ρ ◦ Φ ◦ κ −1 i κ,j κ(m) j Xm .