Wednesday 6/3/09 and Friday 6/5/09: Review of course.

Monday 6/1/09: I finished 6.4.

Friday 5/29/09: I finished 6.3 and began 6.4, Differential equations with discontinuous forcing functions.

Wednesday 5/27/09: I finished 6.2 and began 6.3, Step functions.

Monday 5/25/09: Memorial day.

Friday 5/22/09: I continued to discuss 6.2.

Wednesday 5/20/09: The second midterm.

Monday 5/18/09: I gave a review for the second midterm.

Friday 5/15/09: I began 6.2, Solution of initial value problems via Laplace transform.

Wednesday 5/13/09: I covered 6.1, Definition of the Laplace transform.

Monday 5/11/09: I finished 3.9.

Friday 5/8/09: I continued to discuss 3.9. Please try the interactive tools here and here.

Wednesday 5/6/09: I finished 3.8 and began 3.9, Forced vibrations.

Monday 5/3/09: I continued to discuss 3.8.

Friday 5/1/09: I finished 3.6 and began 3.8, Mechanical and electrical vibrations. (We have skipped 3.7 for the moment.)

Wednesday 4/29/09: I continued to discuss 3.6.

Monday 4/27/09: I finished 3.5 and began 3.6, Nonhomogeneous equations: the method of undetermined coefficients.

Friday 4/24/09: I began 3.5, Repeated roots and reduction of order.

Wednesday 4/22/09: The first midterm.

Monday 4/20/09: I gave a review of the syllabus for the first midterm: 2.1, 2.2, 2.3, 2.4, 2.5, 2.7 and 3.1.

Friday 4/17/09: I covered 3.4, Complex roots of the characteristic equation.

Wednesday 4/15/09: I covered 3.1, Homogeneous equations with constant coefficients. Note: we have skipped 2.8 for the moment, we may return to it later.

Monday 4/13/09: I covered 2.7, Numerical approximations: Euler's method (try interactive tool here). Note: we will not cover 2.6.

Friday 4/10/09: I finished 2.4 and covered 2.5, Autonomous equations.

Wednesday 4/8/09: I finished 2.3 and began 2.4, Differences between linear and nonlinear differential equations.

Monday 4/6/09: I discussed direction fields (try interactive tool here) and began 2.3, Modelling with first order differential equations. 

Friday 4/3/09: I finished 2.1 and covered 2.2, Separable equations.

Wednesday 4/1/09: I began section 2.1, Linear first order differential equations.

Monday 30/3/09:  I gave some examples of differential equations (population growth and oscillatory motion).