Smooth manifolds and smooth functions

Calculus review

Partial derivatives, \(C^k\) functions, chain rule, inverse function theorem, implicit function theorem.

Smooth manifolds

Charts, atlases, smooth structures, and smooth manifolds.

Smooth functions

Smooth functions, diffeomorphisms, bump functions, and partitions of unity.

Examples

Inverse images of regular values, products, covering spaces, classical groups, connected sums.

Tangent vectors and vector fields

Tangent vectors

Different definitions of tangent vectors.

Tangent bundle

The tangent bundle as a smooth manifold.

Differentials of smooth maps

Differential of a smooth function. Immersions, submersions, and embeddings.

Submanifolds

Submanifolds. Examples given by embeddings and level sets.

Vector fields

Vector fields, global derivations, locality.

Flows

Flows of vector fields: existence and uniqueness.

Lie brackets

Lie brackets of vector fields. Fields commute if and only if their flows commute.

Vector bundles and tensors

Algebras and modules

Super quick review of algebras, ideals, and modules.

Tensor products

Tensor products: definition and basic properties.

Vector bundles and trivializations

Vector bundles, trivializations, basic constructions, basic properties.

Serre–Swan Theorem

Projective finitely-generated modules, and Serre-Swan Theorem.

Tensors on manifolds

Tensors on manifolds.

Differential forms

Differential forms

Antisymmetrization and forms.

Wedge products

Wedge products, graded commutativity, and associativity.

Exterior derivatives

Exterior derivatives, charts, Leibniz rule, and nilpotency.

Pullbacks

Pullbacks: interaction with wedge product and exterior derivative.

Oriented manifolds

Orientations.

Integrals

Integration of forms on \(\mathbb {R}^n\) and on manifolds.

Manifolds with boundary

Everything generalizes to manifolds with boundary.

Stokes Theorem

Stokes Theorem

Homework

HW 1

Due April 10.

HW 2

Due April 25.

HW 3

Due May 10.

HW 4

Due May 24.

HW 5

Due June 7.

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