Differential Equations

Math 23 Summer 2026

Lecture Plan

The following is a tentative schedule for the course. Please check back regularly for updates as the term progresses. Group Assignments will be made available through the CANVAS website.

Lectures Sections in Text Description Additional comments
Friday June 26 1.1.
Begin 1.2
Basic mathematical models; Solutions of some differential equations.
Khan Academy - Differential equations intro
Khan AcademyA - Slope fields & equations
Interactive website for plotting slope fields and trajectories

Saturday June 27 8:00-9:05 am Finish 1.2.
1.3
Solutions to some problems; Classification of differential equations.
Khan Academy - Exponential model equations
Monday June 29 2.1, 2.2 Linear first order differential equations; separable equations.
Khan Academy - Separable equations
Wednesday July 1 2.4 Existence-uniqueness theorems.
Khan Academy -Write differential equations
Monday July 6 2.3 Modeling with differential equations
Khan Academy - Slope fields & solutions
Wednesday July 8 2.5 Autonomous equations and population dynamics
Friday July 10 2.6 Exact equations
Monday July 13 3.1, 3.2 Second order constant coefficient equations
with distinct roots; the Wronskian
Wednesday July 15 3.3 Complex conjugate roots
Friday July 17 3.4 Repeated roots and reduction of order
Monday July 20 3.5, 3.6 Nonhomogeneous equations: Method of undetermined coefficients and variation of parameters
Tuesday July 21: 6 pm. test 1 material through 3.4.
Old past exams: Others will be posted on CANVAS
Wednesday July 22 7.1, 7.2 Review of matrices.
Friday July 24 7.3, 7.4 Systems of ODEs; Existence and uniqueness of solutions of systems of ODEs.
Monday July 27 7.5 Constant coefficients systems with distinct real eigenvalues
Wednesday July 29 7.6 Constant coefficient systems with complex conjugate eigenvalues
Friday July 31 7.8 Repeated Eigenvalues
Monday August 3 7.9 Nonhomogeneous Linear Systems
Wednesday August 5 9.1 The Phase Plane (Good review!)
Friday August 7 9.2 Autonomous Systems and Stability
Plotting slope fields and trajectories
Direction field plotter

Monday August 10 9.3 Locally Linear Systems
Wednesday August 12 9.4 Competing Species
Friday August 14 9.5 Predator-Prey Equations
Monday August 17 Review Chapter 9
Tuesday August 18 test 2 Material from 3.5 through 9.5. Old past exams: Others will be posted on CANVAS
Wednesday August 19 6.1, 6.2 Laplace Transform and the IVP
Khan Academy: Laplace transform intro
Khan Academy: Properties of the Laplace transform
Khan Academy: Laplace transform to solve a differential equation
Friday August 21 6.3 Step functions
Monday August 24 6.4, 6.5 Discontinuous forcing functions, Impulse Functions KA: Laplace/step function differential equation
Wednesday August 26 (Last day of instruction) 6.6 The convolution integral
Khan Academy: The convolution integral
Exam TBD Time TBD Room TBD Exam covers material from the whole course. Old past exams. Others will be posted on CANVAS