Course Info 
Weekly Schedules 
Calendar 


Course description: This course includes most of the standard material for differential equations: firstorder differential equations and analytic methods of their solution, mathematical modeling using differential equations, numerical methods for solving differential equations, linear equations of higher order, systems of linear and nonlinear equations, stability of equilibrium solutions, Laplace transform methods. In addition some related material from linear algebra is included. We use a computer algebra system Maple in this course for some computer projects.
Textbook: C.H.Edwards,Jr. and D.E.Penney , Differential Equations and Linear Algebra , (Third Edition) Prentice Hall.
It is expected that you will work most of the basic exercises at the end of each section. A list of additional problems to work will be placed at the course webpage (see homework problems). It is recommended to write down solutions of these problems and keep your homework to use in preparation for quizzes, midterm and final exams. Every week we'll have a quiz containing two or three problems analogous to ones solved in class and from homework. If you have any questions about problems, please ask them in class or during office hours.
Complementary useful reading for problems and solutions manual is available on the Web via WMU Library page in the electronic form: Bronson, R. Schaum’s outline of theory and problems of differential equations [electronic resource]
Office Hours: Monday,Tuesday and Friday: 11:00 am  11:50 am , Thursday 1:00 pm  1:50 pm in Everett Tower 5527,
Detailed schedule can be found here.
Week 14: December 04  December 08
Topics for study and reading :
 Section 9.1 Phase portraits. Stability and asymptotic stability of solutions of linear systems. Equilibrium solutions.
 Section 9.2 Nonlinear Systems  their critical points and equilibrium solutions. Stability of equilibrium solutions. Linearization of systems near equilibrium solutions.
 Section 10.1 Laplace transforms and inverse transforms
 Review of the course
Week 13: November 27  December 01
Topics for study and reading :
Quiz on Friday, December 1: problems from Section 8.1, 8.2.
 Section 7.5 Multiple eigenvalue solutions.
 Section 8.1 Matrix exponentials and linear systems : fundamental matrix solution and exponential matrix.
 Section 8.2 Nonhomogeneous linear system and method of variation of parameters. Cauchy's formula.
Week 12 November 20  November 24
Topics for study and reading :
Quiz on Tuesday: Sections 7.2 and 7.3.
 Section 7.3 Eigenvalue method for linear systems
 Section 7.5 Multiple eigenvalue solutions.
Week 11: November 13  November 17
Topics for study and reading :
Midterm exam on Thursday, November 16, includes topics from Chapter 5 (Sections 5.15.6) and Chapter 7 (Sections 7.1): sample exam
 Section 7.2.Matrices and linear systems.
 Section 7.3 Eigenvalue method for linear systems ( including complex eigenvalues).
Week 10: November 06  November 10
Topics for study and reading :
 Section 5.5 Nonhomogeneous equations and the method of undetermined coefficients.
 Section 5.6 Forced oscillations and resonance
 Section 7.1 Firstorder systems of differential equations. Transformation of higherorder differential equation to firstorder system. Simple twodimensional systems.
 Section 7.2.Matrices and linear systems.
Quiz on Friday : problems from Section 5.4, 5.5, 5.6.
Week 9: October 30  November 03
Topics for study and reading :
Quiz on Friday: Sections 5.3, 5.4
 Section 5.3 Linear nth order linear differential equations with constant coefficients. Complex numbers, Euler formula..
 Section 5.4 Mechanical vibrations: simple pendulum, springdashpot mechanical system. Free undamped motion: amplitude, circular frequency and phase angle. Free damped motion.
 Section 5.5 Nonhomogeneous equations and the method of undetermined coefficients.
 Section 5.6 Forced oscillations and resonance
Week 8: October 23  October 27
Topics for study and reading :
Quiz on Friday : problems from Section 5.1,5.2 and 5.3
 Section 5.1 Linear secondorder differential equations and their general solutions
 Sections 5.2 Linear nth order differential equations.Existence and uniqueness of solutions. Superposition principle. Linear dependence of solutions, wronskians. General solutions homogeneous linear differential equations.
 Section 5.3 Linear nth order linear differential equations with constant coefficients. Characteristic equation. Cases of distinct and repeated roots. Complex numbers, Euler formula..
Week 7: October 16  October 20
Topics for study and reading :
Quiz on Friday contains problems from Sections 3.4, 3.5 and 3.6 (matrix operations, determinants).
 Chapter 3: Determinants, inverse matrices, homogeneous linear systems of equations.
 Section 4.3: Linear combinations, linear dependence and independence of vectors.
 Section 5.1 Linear secondorder differential equations and their general solutions
 Sections 5.2 Linear nth order differential equations.Existence and uniqueness of solutions. Superposition principle. Linear dependence of solutions, wronskians. General solutions homogeneous linear differential equations.
Week 6: October 09  October 13
Topics for study and reading :
Quiz on Friday, October 13: problems from Sections 3.43.6: matrix products, determinants, inverse matrices.
 Chapter 3: Elements of linear algebra: vector and matrix operations, matrix product, determinants, inverse matrices.
 Chapter 3: Determinants, inverse matrices, homogeneous linear systems of equations.
 Section 4.3: Linear combinations, linear dependence and independence of vectors.
First midterm exam on Thursday, October 12 (sample exam) will cover Chapters 1 and 2 (sections 2.12.3) and Chapter 3 (Sections 3.13.3).
Maple computer project. Maple Computer Project #2 is due to Tuesday, October 10.
Week 5: October 02  October 06
Topics for study and reading :
Quiz on Friday: Sections 2.2, 2.3 , 3.1.
 Computer algebra system Maple: Introduction ( basic capabilities, plotting, programming, Differential Equations packages)
 Sections 2.4, 25 Numerical approximation of solutions: Euler's method, improved Euler method, RungeKutta method.
 Sections 3.13.3: Linear system of algebraic equations and their general solutions. GaussJordan elimination method.
 Chapter 3: Elements of linear algebra: vector and matrix operations, matrix product, determinants, inverse matrices.
Second Maple Computer project is due to Tuesday, October 10. Download Maple worksheets:
 Numerical methods for firstorder differential equations (Euler and Improved Euler methods)
 Maple worksheet with a task for the Computer project #2
Week 4: September 25  September 29
Topics for study and reading
We'll meet at Computer Lab (Rood 3396 ) on Thursday, September 28, at 2 pm to work on Maple computer project. Maple Computer Project #1 is due to Tuesday, October 3.
 Section 2.1 Mathematical models: population models. Logistic equation and its applications.
 Section 2.2 Equilibrium solutions and their stability.
 Section 2.3 Accelerationvelocity models. Motion under resistance forces.
 Computer algebra system Maple: Introduction ( basic capabilities, plotting, programming, Differential Equations packages)
Quiz on Friday (Sections 2.1 and 2.2) .
Week 3: September 18  September 22
Topics for study and reading
Quiz on Friday : problems from Sections 1.5, 1.6 .
 Section 1.6 Substitution (or, change of variables) method, homogeneous equations,Bernoulli equations.
Exact differential equations and criterion for exactness. Section 2.1 Mathematical models: population models. Logistic equation and its applications.
 Section 2.2 Equilibrium solutions and their stability.
Quiz on Friday problems from Sections 1.3, 1.4, 1.5 ,theorem on existence and uniqueness of solutions
Quiz on Friday: problems from Sections 1.1, 1.2 , similar to homework problems for 4th edition, homework problems for 3rd edition.
Note that problems
marked with * are extra.
Section 2.2 (page 92) 1, 3, 6, 9, 11, 14, 15, 21
Section 2.3 (page 101) 2, 4, 7, 10, 11, 20, 28
Section 2.4 (page 114) 1, 3, 4, 9, 12, 14
Section 2.6 (page
133) 2, 4, 14, 15
Section 3.1 (page 145) 1, 5, 7, 11, 17, 23, 31
Section 3.2 (page 154) 1, 5, 11, 19, 24*,
Section 3.3 (page 162) 1, 3, 17
Section 3.4 (page 173) 1, 3, 5, 7, 14, 17, 27*
Section 3.5 (page 185) 1, 3, 25, 30, 32
Section 3.6 (page 201) 1, 2, 47, 48, 52
Section 4.3 (page 234) 17, 18, 19
Section 5.1 (page 276) 1, 5, 8, 11, 12, 13, 14, 16, 20, 23, 26, 27, 33, 34, 36. , 41, 43, 46, 48,
Section 5.2 (page 288) 1, 4, 7, 9, 11, 13, 14, 18, 21, 24
Section 5.3 (page 300) 1,4,5,6, 11,13, 20, 21, 24, 25, 27, 30, 33, 39, 43,
Note that problems marked with * are extra.
Section 2.2 (page 96) 1, 3, 6, 9, 11, 14, 15, 21
Section 2.3 (page 106) 2, 4, 7, 10, 11, 20, 28
Section 2.4 (page 119) 1, 3, 4, 9, 12, 14
Section 2.6 (page 141) 2, 4, 14, 15
Section 3.1 (page 152) 1, 5, 7, 11, 17, 23, 31
Section 3.2 (page 162) 1, 5, 11, 19, 24*,
Section 3.3 (page 170) 1, 3, 17
Section 3.4 (page 182) 1, 3, 5, 7, 14, 17, 27*
Section 3.5 (page 194) 1, 3, 25, 30, 32
Section 3.6 (page 212) 1, 2, 47, 48, 52
Section 4.3 (page 248) 17, 18, 19
Section 5.1 (page 294) 1, 5, 8, 11, 12, 13, 14, 16, 20, 23, 26, 27, 33, 34, 36. , 41, 43, 46, 48,
Section 5.2 (page 306) 1, 4, 7, 9, 11, 13, 14, 18, 21, 24
Section 5.3 (page 319) 1,4,5,6, 11,13, 20, 21, 24, 25, 27, 30, 33, 39, 43,
Section 5.4 (page 331) 1, 3, 4, 5, 8, , 10, 13, 15, 24, 27
Section 5.5 (page 346) 1, 4, 7, 11, 12, 17, 21, 26, 36, 41, 44, 47, 58
Section 5.6 (page 357) 2, 5, 10, 15, 20, 22, 26, 28, 30
Section 7.1 (page 400) 1, 2, 5, 8, , 9, 11, 15, 21, 28
Section 7.2 (page 413) 1, 3 , 5, 15, 24, 28, 37
Section 7.3 (page 426) 1, 3, 7, 9, 17, 19, 25, 38
Section 7.5 (page 457) 1, 3, 6, 7
Section 8.1 (page 487) 1, 3, 5, 9, 11, 13
Section 8.2 (page 496) 1, 3, 5, 7
Section 9.1 (page 519) 9, 11, 13, 14, 15, 20
Section 9.2 (page
532) 1,3, 5, 7. 9. 19. 21. 27. 29
In general, there
will be NO makeups for exams. If you miss an exam for a valid
welldocumented reason then arrangements may be made on an
individual basis.
Last modified : October
13, 2017