18.03 | Spring 2010 | Undergraduate

Differential Equations

Recitations

The problems are designed to be worked on by students in groups in recitation.

REC # TOPICS PROBLEMS SOLUTIONS
I. First-order differential equations
1 Natural growth, separable equations (PDF) (PDF)
2 Direction fields, integral curves, isoclines, separatrices, funnels (PDF) (PDF)
3 Euler’s method; linear models (PDF) (PDF)
4 First order linear ODEs; integrating factors (PDF) (PDF)
5 Complex numbers; complex exponentials (PDF) (PDF)
6 Review for exam I    
II. Second-order linear equations
7 Solutions to second order ODEs (PDF) (PDF)
8 Homogeneous 2nd order linear constant coefficient equations (PDF) (PDF)
9 Exponential and sinusoidal input signals (PDF) (PDF)
10 Gain and phase lag; resonance; undetermined coefficients (PDF) (PDF)
11 Frequency response (PDF) (PDF)
12 Review for exam II    
III. Fourier series
13 Fourier series: introduction (PDF) (PDF)
14 Fourier series (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 Laplace transform II (PDF) (PDF)
20 Review for exam III    
IV. First order systems
21 First order linear systems (PDF) (PDF)
22 Eigenvalues and eigenvectors (PDF) (PDF)
23 Linear phase portraits (PDF) (PDF)
24 Matrix exponentials (PDF) (PDF)
25 Autonomous systems (PDF) (PDF)
26 Reviews    

Course Info

Departments
As Taught In
Spring 2010
Learning Resource Types
Lecture Videos
Simulations
Lecture Notes
Problem Sets with Solutions