Linear Algebra I
M04 — Spring 25
Contents
1 Fields and complex numbers
1.1 Reminders on sets and mappings
Exercises
1.2 Fields
1.3 Complex numbers
Exercises
2 Matrices, I
2.1 Definitions
2.2 Arithmetic with matrices
2.3 Transpose and inverse
Exercises
3 Matrices, II
3.1 Row echelon form
3.2 Solving equations
3.3 Inverting a matrix
Exercises
4 Vector spaces
4.1 Abstract vector spaces
4.2 Linear combinations
4.3 Vector subspaces
4.4 Subspaces generated by sets
4.5 Generating sets and finite-dimensionality
4.6 Linear independence
Exercises
5 Dimensions of vector spaces
5.1 Growing and shrinking sets
5.2 The fundamental inequality
5.3 Bases of vector spaces
5.4 Dimensions of vector spaces
5.5 Computing with subspaces
Exercises
6 Linear maps
6.1 Linear maps
6.2 Images, preimages, kernels
6.3 The rank-nullity theorem
Exercises
7 Linear maps and matrices
7.1 Linear mappings associated to matrices
7.2 Computing kernels and images
Exercises
8 Coordinate systems and changes of basis
8.1 Linear coordinate systems
8.2 The matrix of a linear map
8.3 Change of basis
Exercises
9 The determinant, I
9.1 Axiomatic characterisation
9.2 Uniqueness of the determinant
9.3 Existence of the determinant
Exercises
10 The determinant, II
10.1 Properties of the determinant
10.2 Permutations
10.3 The Leibniz formula
10.4 Cramer’s rule
Exercises
11 Endomorphisms, I
11.1 Matrices of endomorphisms
11.2 Detour: More on Subspaces
11.3 Eigenvectors and eigenvalues
11.4 The characteristic polynomial
Exercises
12 Endomorphisms, II
12.1 Properties of eigenvalues
12.2 Special endomorphisms
Exercises
13 Affine spaces and quotient vector spaces
13.1 Affine mappings and affine spaces
13.2 Quotient vector spaces
Exercises
Linear Algebra I
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