Lectures – MAT 308

Notation:
B = the book Introduction to Differential Equations (2nd edition) by Michael E. Taylor
N = Online Notes by Pichkitti Bannangkoon

DateTopicReferencesLecture Notes
M 01/24/2022Introduction to course; Classification of Ordinary Differential Equations (ODE); Solutions of ODE.N - Sections 1.1, 1.2Lecture1
W 01/26/2022The exponential and trigonometric functions; First order linear equations;B - Sections 1.1, 1.2
N - Section 2.1.3
Lecture 2
M 01/31/2022Examples on first order ODE; General solution and Initial Value Problem; Implicit and Explicit solutions; Separable equations; B - Sections 1.2, 1.3
N - Sections 2.1.1, 2.1.3
Lecture 3
W 02/02/20222nd order differential equations x''=f(t,x,x'); Special cases when f is independent of x and f is independent of t; Physics application.B - Sections 1.4, 1.5
N - Section 3.8
Lecture 4
M 02/07/2022Second order constant-coefficient linear equations-homogeneous (two distinct real roots and repeated real roots cases)B - Section 1.9
N - Sections 3.2.1, 3.2.3
Lecture 5
W 02/09/2022Second order constant-coefficient linear equations-homogeneous with two complex conjugate rootsB - Section 1.9
N - Section 3.2.2
Lecture 6
M 02/14/2022Nonhomogeneous equation. Finding a particular solution using the method of undetermined coefficients.B - Section 1.10
N - Section 3.6.1

Handout
Lecture 7
W 02/16/2022Finding a particular solution using the method of undetermined coefficients. Mechanical vibrations.B - Section 1.10
N - Section 3.6.1, 3.7

Handout - Mechanical Vibrations
Lecture 8
M 02/21/2022Undamped free vibrations; Damped free vibrations.B - Sections 1.12, 1.9
N- Sections 3.7.1, 3.7.2
Lecture 9
W 02/23/2022Undamped forced vibrations (beat and resonance); Higher order linear homogeneous equations with constant coefficients; Wronskian determinant.B- Sections 1.12, 1.9, 1.17, 1.14
N- Sections 3.7.3, 4, 3.1
Lecture 10
M 02/28/2022Abel's theorem; Use Wronskian to solve a second order linear homogeneous equation. Laplace transformB - Sections 1.15, 1.18
N - Sections 3.5, 5.1
Lecture 11
W 03/02/2022Laplace Transform and Inverse Laplace Transform; Step Functions.B - Section 1.18
N - Sections 5.3, 5.4.1, 5.5

Handout - Partial Fraction Decomposition

Handout - Laplace Transform for solving ODI
Lecture 12
M 03/07/2022Step Functions.N - Section 5.5Lecture13
W 03/09/2022Midterm
M 03/14/2022Spring Break - no class
W 03/16/2022Spring Break - no class
M 03/21/2022Vector spaces; Linear transformations.B - Sections 2.1, 2.2Lecture 14
W 03/23/2022Definitions of injective, surjective, isomorphism, invertible for linear transformations; A basis for a subspace of a vector space.B- Section 2.3Lecture 15
M 03/28/2022Coordinates; Properties of a basis. Isomorphism with R^n of a vector space with a basis with n vectors in it; Examples on how to use linear systems to answer questions on span, linear independence, basis, etc.B- Section 2.3Lecture 16
W 03/30/2022Examples on how to use linear systems to answer questions on span, linear independence, basis, etc. (continue).
Linear transformations and their matrix representation.
B - Section 2.4Lecture 17
M 04/04/2022The simple form of a linear transformation if we can choose bases for domain and codomain; Rank-Nullity Theorem; Eigenvalues and eigenvectors.B - Sections 2.4, 2.6Lecture18
W 04/06/2022Algorithm to find eigenvalues and eigenvectors; Why having a basis of eigenvectors is useful? Diagonal matrices.B - Section 2.6Lecture 19
M 04/11/2022Diagonalization; Linear algebra interpretation of linear differential equation;B - Sections 2.6Lecture 20
W 04/13/2022Rewrite a system of linear differential equations as a system of first order linear differential equations.B - Section 3.3Lecture 21
M 04/18/2022How to compute the matrix exponential; Change of basis.B - Sections 2.4, 3.1 Lecture 22
W 04/20/2022Diagonalization of a matrix and computing matrix exponential; Nonhomogeneous equations and Duhamel's formula; RLC circuit example as application.B - Sections 3.1, 3.4, 3.5Lecture 23
M 04/25/2022Method of undetermined coefficients for linear systems; Power series method; Existence and uniqueness theorems.B - Sections 3.10, 4.1Lecture 24
W 04/27/2022Existence and uniqueness theorem for the first order differential equation. The version for the linear equation. B - Section 4.1
N - Section 2.2
Lecture 25
M 05/02/2022Proof of the existence and uniqueness theoremB - Section 4.1Lecture 26
W 05/04/2022Review
Tu 05/17/2022Final Exam