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• • • ## Differential Equations

### Course Summary

This course is based on 18.03 Differential Equations, Spring 2006 made available by Massachusetts Institute of Technology: MIT OpenCourseWare under the Creative Commons BY-NC-SA license.
Differential Equations are the language in which the laws of nature are expressed. Understanding properties of solutions of differential equations is fundamental to much of contemporary science and engineering. The lectures were conducted by Prof. Arthur Mattuck at MIT in Spring 2003.

Ordinary differential equations (ODE's) deal with functions of one variable, which can often be thought of as time. Topics include: Solution of first-order ODE's by analytical, graphical and numerical methods; Linear ODE's, especially second order with constant coefficients; Undetermined coefficients and variation of parameters; Sinusoidal and exponential signals: oscillations, damping, resonance; Complex numbers and exponentials; Fourier series, periodic solutions; Delta functions, convolution, and Laplace transform methods; Matrix and first order linear systems: eigenvalues and eigenvectors; and Non-linear autonomous systems: critical point analysis and phase plane diagrams.

These video lectures by Professor Arthur Mattuck were recorded live in the Spring 2003 and do not correspond precisely to the lectures taught in the Spring of 2006. Professor Mattuck has inspired and informed generations of MIT students with his engaging lectures.

1. Textbook (MIT 18.03): Elementary Differential Equations with Boundary Value Problems. 5th ed.
Edwards, C., and D. Penney. Elementary Differential Equations with Boundary Value Problems. 5th ed. Upper Saddle River, NJ: Prentice Hall, 2003. ISBN: 013145773X.

### Course Material

1. Recitation Questions (MIT 18.03)
TOPICS SOLUTIONS
1 Natural Growth and Decay (PDF) (PDF)
2 Direction Fields, Integral Curves, Isoclines (PDF) (PDF)
3 Numerical Methods; Linear Models (PDF) (PDF)
4 First Order Linear ODEs: Models and Solutions (PDF) (PDF)
5 Complex Numbers, Complex Exponentials (PDF) (PDF)
6 Using the Complex Exponential; Autonomous Equations (PDF) (PDF)
7 Solutions to Second Order ODEs (PDF) (PDF)
8 Homogeneous Second Order Linear Equations (PDF) (PDF)
9 Second Order Linear Equations (PDF) (PDF)
10 Operators, Exponential Response, Exponential Shift, Undetermined Coefficients (PDF) (PDF)
11 Superposition, Frequency Response (PDF) (PDF)
12 Review
13 Fourier Series: Introduction (PDF) (PDF)
14 Fourier Series: Playing Around (PDF) (PDF)
15 Fourier Series: Harmonic Response (PDF) (PDF)
16 Step and Delta Functions, and Step and Delta Responses (PDF) (PDF)
17 Convolution (PDF) (PDF)
18 Laplace Transform (PDF) (PDF)
19 Hour Exam Review (PDF) (PDF)
20 Systems of First Order Equations (PDF) (PDF)
21 Eigenvalues and Eigenvectors (PDF) (PDF)
22 Complex or Repeated Eigenvalues (PDF) (PDF)
23 Qualitative Analysis of Linear Systems (PDF) (PDF)
24 Matrix Exponentials and Inhomogeneous Equations (PDF) (PDF)
25 Qualitative Analysis of Nonlinear Systems (PDF) (PDF)
26 Review

2. Assignments (MIT 18.03)
LEC # ASSIGNMENTS SOLUTIONS
4 Problem Set 1 (PDF) (PDF)
8 Problem Set 2 (PDF) (PDF)
14 Problem Set 3 (PDF) (PDF)
17 Problem Set 4 (PDF) (PDF)
23 Problem Set 5 (PDF) (PDF)
26 Problem Set 6 (PDF) (PDF)
28 Problem Set 7 (PDF) (PDF)
34 Problem Set 8 (PDF) (PDF)
37 Problem Set 9 (PDF) (PDF)

3. Exam questions and solutions (MIT 18.03)
PRACTICE EXAMS EXAMS SOLUTIONS
L10 Practice Exam and Solutions (PDF) (PDF) (PDF)
L19 Study Guide and Two Practice Exams with Solutions (PDF) (PDF) (PDF)
L30 Formula Sheet and Two Practice Exams with Solutions (PDF) (PDF) (PDF)
L40 Formula Sheet and Two Practice Final Exams With Solutions (PDF) (PDF)

Not available.

### Software

1. Mathlets tool
Ordinary Differential Equations Manipulatives software tool.

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