Math 23
Differential Equations
Tentative Lecture plan
For the section taught by Vladimir Chernov
This lecture plan is tentative and will be updated irregularly. The homework
page will be updated on the regular basis
Lectures 
Sections in Text 
Brief Description 
Monday March 30, 2009 
1.1, 1.2 and start 1.3 
Differential equations, solution, direction fields 
Wednesday April 1 We do have a lecture this is not a joke 
1.3, 2.1 
Classification of differential equations, Linear and
Separable equations, integrating factors 
Friday April 3 
2.2, 2.4 
Nonlinear equations, and more about 
Monday April 6 
2.3 
Modeling with differential equations 
Wednesday April 8 
2.5, 2.6 
Autonomous equations and population dynamics. Start Exact
equations. 
Friday April 10 
2.6 
Exact equations integrating factors 
Monday April 13 Final day for electing to use the NonRecording Option. 
3.1, 3.2 
Homogeneous equations with constant coefficients, their
solutions, Wronskian 
Wednesday April 15 
3.3, 3.4 
Complex roots, repeated roots 
Friday April 17 
3.4 
Reduction of order 
Monday April 20 
3.5 
Nonhomogeneous equations, method of undetermined
coefficients 
Tuesday April 21 xhour instead of the class on Friday April 24 First Midterm Exam
68 PM in Carpenter 013 
3.6 
Variation of parameter 
Wednesday April 22 
3.7, 3.8 
Mechanical and Electrical vibrations, forced vibrations 
Friday April 24 No class for Chernov’s Section 


Monday April 27 
4.1, 4.2 
Nth order linear differential equations, homogeneous
equations with constant coefficients 
Wednesday April 29 
4.3 
Method of undetermined coefficients 
Friday May 1 
5.1, 5.2 
Powers series and series solutions near an ordinary point 
Monday May 4 
5.3, 5.4 
Series solutions near an ordinary and near a regular
singular point 
Wednesday May 6 
7.1, 7.2 
Introduction to systems of first order linear differential
equations, review of matricies 
Friday May 8 
7.3 
Linear independence, eigen values and eigen vectors 
Monday May 11 
7.4, 7.5 
Some basic theory of systems of first order differential
equations, systems with constant coefficients 
Tuesday May 12 xhour 
7.6 

Wednesday May 13 Second Midterm Exam
68 PM in Carpenter 013 
7.8 
Repeated eigen values 
Friday May 15 


Monday May 18 Note that Tuesday May 19 is the final day to withdraw from
a course 
10.1 
Two point boundary value problem 
Wednesday May 20 
10.2 
Fourier Series 
Friday May 22 
10.3, 10.4 
Fourier Convergence Theorem, Even and odd functions and
their fourier series 
Monday May 25 Memorial Day No class 


Wednesday May 27 Final day to alter grade limit filed under the
NonRecording Option. 
10.5 
Separation of variables heat conduction in a rod 
Friday May 29 
10.6 
Other heat conduction problems 
Monday June 1 
10.7 
Wave equation 
June 34 PreExamination Break 


Math 23 Final
Exam is 36 PM Friday June 5 in Moore Filene Final Examinations begin on Friday June 5 and end on
Tuesday June 9 

