University of Illinois at Urbana-Champaign

Lecture Log for Math 285

Date Topics covered Reference Date Topics covered Reference Date Topics covered Reference
1/19 NO CLASS 1/21 Introduction
Solving DE's by integration
1.1, 1.2 1/23 separable equations 1.4
1/26 First IODE lab Lab 1 1/28 Vector Fields
Existence and Uniqueness Theorem
1.3
handout
1/30 finish separable equations
first-order linear equations
1.4, 1.5
2/2 finish linear equations 1.5
handout
2/4 substitution methods 1.6 2/6 autonomous equations, phaseline
qualitative methods
2.1, 2.2
2/9 Second IODE lab Lab 2 2/11 Euler's method 2.4 2/13 introduction to higher-order equations 3.1
2/16 constant-coefficient equations (2nd order) 3.1 2/18 existence/uniqueness for linear equations
the Wronskian test
3.1 2/20 higher order equations 3.2
handout
2/23 constant-coefficient equations (arbitrary order)
differential operators
3.3 2/25 review for exam I study guide
for exam I
2/27 Midterm Exam I
3/1 mechanical oscillations 3.4 3/3 mechanical oscillations
(continued)
3.4 3/5 forced (nonhomogeneous) equations
method of undetermined coefficients
3.5
3/8 forced (nonhomogeneous) equations
method of undetermined coefficients (continued)
3.5 3/10 forced (nonhomogeneous) equations
method of variation of parameters
mechanical oscillations
3.5, 3.6 3/12 mechanical oscillations
(continued)
3.6
3/15 boundary value problems
eigenvalues and eigenfunctions
3.8 3/17 periodicity of functions 9.1 3/19 introduction to Fourier series 9.1
3/29 Fourier series for 2 pi -periodic functions 9.1
study guide
for exam II
3/31 Fourier series for arbitrary periodic functions 9.2 4/2 Fourier series (continued) 9.2 handout
4/5 sine and cosine Fourier series
even and odd extensions
solving constant coefficient equations via Fourier series
9.3 4/7 Midterm Exam II 4/9 solving constant coefficient equations via Fourier series 9.3, 9.4
4/12 solving constant coefficient equations via Fourier series
applications to oscillation problems
9.4 4/14 heat equation 9.5 4/16 heat equation (continued) 9.5
4/19 heat equation (continued) 9.5 4/21 wave equation 9.6 4/23 wave equation (continued) 9.6
4/26 wave equation (continued) 9.6 4/28 Laplace's equation 9.7 4/30 Laplace's equation (continued) 9.7
5/3 Laplace's equation (continued) 9.7 5/5 review for the final exam study guide
for the final exam


review problems
5/7 NO CLASS