topics in linear algebra

Ch. 1 Projections.

1. What is a Matrix?

#30, Linear Transformations and Their Matrices
7.1 The Idea of a Linear Transformation
7.2 The Matrix of a Linear Transformation (*)
1.3 Matrices (new to 4th edition) (*)

2. Linear Equations

#1: The Geometry of Linear Equations
#2: Elimination with Matrices
2.1 Vectors and Linear Equations
2.2 The Idea of Elimination

3. Matrix Multiplications

#3: Multiplication and Inverse Matrices
Homework 3
2.4 Rules for Matrix Operations
2.5 Inverse Matrices (*)
7.2 The Matrix of a Linear Transformation
(Products AB match...) (*)

4. LU (Gauss-Jordan) and Inverses

#4: Factorization into A = LU
Homework 4, hw4.m
2.3 Elimination Using Matrices
2.6 Elimination = Factorization: A = LU

5. Orthogonal Matrices, Permutations

#5: Transposes, Permutations, Spaces R^n
#17: Orthogonal Matrices and Gram-Schmidt (*)
Homework 5, hw5.m
2.7 Transposes and Permutations

6. Column Space and Kernel

#6: Column Space and Nullspace
Homework 6
3.1 Spaces of Vectors
3.2 The Nullspace of A: Solving Ax = 0

7. Row Reduced Form

#7: Solving Ax = 0: Pivot Variables, Special Solutions
#8: Solving Ax = b: Row Reduced Form R (*)
Homework 7, hw7.m
3.2 The Nullspace of A: Solving Ax = 0
3.3 The Rank and the Row Reduced Form

8. Subspaces

#9: Independence, Basis, and Dimension
#10: The Four Fundamental Subspaces
#13: Quiz 1 Review (*)
Homework 8
3.5 Independence, Basis and Dimension
3.6 Dimensions of the Four Subspaces

9. Projections

#14: Orthogonal Vectors and Subspaces (*)
#15: Projections onto Subspaces
Homework 9
4.2 Projections

10. Least Squares

#16: Projection Matrices and Least Squares
Homework 10
4.3 Least Squares Approximations (*)

11. Least Squares and Likelihood

12.QR Decomposition

#17: Orthogonal Matrices and Gram-Schmidt
4.4 Orthogonal Bases and Gram-Schmidt


Ch. 2 Eigenvectors.

1. Determinant

#18: Properties of Determinants
#20: Cramer's Rule, Inverse Matrix, and Volume (*)
5.1 The Properties of Determinants

2. Eigenvectors

#21: Eigenvalues and Eigenvectors
Homework 15, hw15.m
6.1 Introduction to Eigenvalues

3. Diagonalization

#22: Diagonalization and Powers of A
6.2 Diagonalizing a Matrix

4. Positive Definite Matrices

#25 : Symmetric Matrices and Positive Definiteness
#27 : Positive Definite Matrices and Minima
6.4 Symmetric Matrices
6.5 Positive Definite Matrices

5. Singular Value Decomposition

#29 : Singular Value Decomposition
6.7 Singular Value Decomposition (SVD)


Ch. 3 Graphs.



Ch. 4 Convexity.



Ch. 5 Matrix Decompositions.