Retired 12/31/2008: Topics include linear equations of the first order; linear equations with constant coefficients; the general linear equation; variation of parameters; undetermined coefficients; linear independence; the Wronskian; exact equations; separation of variables, and applications, plus 2 or 3 of the following: systems of linear differential equations, solution by Laplace transforms, existence and uniqueness of solutions, solution by power series, oscillation and comparison theorems, partial differential equations, boundary value problems, numerical methods, and stability of solutions. Prerequisite: Calculus II