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## Syllabus

Course:  Math 20D   (Course Catalog)

Title:  Introduction to Differential Equations

Credit Hours:  4

Prerequisites:  Math 20C (or equivalent)

Catalog Description:  Ordinary differential equations: exact, separable, and linear; constant coefficients, undetermined coefficients, variation of parameters. Series solutions. Systems, Laplace transforms. Computing symbolic and graphical solutions using Matlab.

Textbook:  You can use either of two books for this course:

Material Covered:  We shall cover parts of chapters 2, 3, 5, 6, and 7 of the Boyce and DiPrima text. These correspond to chapters 1, 2, 3, 6, and 7 in the Lebl text. A list of topics scheduled to be covered each day can be found on the  Course Calendar.

Homework:  Homework is a very important part of the course and in order to fully master the topics it is essential that you work carefully on every assignment and try your best to complete every problem. You have two options for homework in this class. You can either (1) submit online homework through WileyPLUS or (2) submit handwritten homework through Gradescope. (For option 2, homework may be typed. All submissions must be PDFs; handwritten submissions must be scanned.)

• In either method, the total number of points for each assignment will be added together and divided by the total number of points available in order to obtain a percentage score.
• The total number of points available will be different for each method, so the scores will be converted to percentages at the end of the quarter.
• Students may choose either homework method. If a student chooses to submit both "online" and "offline" homework, then the highest percentage of the two will be used. (It is not possible to combine the two methods. Only the method giving the higher percentage will be used.)
• It is not necessary for students to specify their choice. The higher percentage score will be used automatically.
• Homework may not be submitted late.
• No homework scores will be dropped at the end of the quarter.

Homework due dates are chosen to help students keep to the pace of the course and stay current with the topics covered in the lectures. The "No late homework" policy is designed to encourage students to complete homework assignments on time and reward those who do.

Course Readings:  Reading the sections in the textbook that correspond to what we are discussing in class is a very important part of learning the subject. Lecture time is very limited and not every subject can be fully covered in the time allotted for lecture. Consequently, it is in your own interests to read the related chapters in the textbook.

Electronic Computing Devices:   Graphing calculators and computer programs (or online computing websites such as Wolfram|Alpha) can be very helpful when working through your homework. However, a calculator or computer should be used as an aid in the learning concepts, not just as a means of computation. You should use these devices when working on math problems at home, but always keep in mind that you will not be allowed access to any electronic computing devices during exams or quizzes. Of course, this also means that you will not be asked to solve problems on exams or quizzes that require the aid of an electronic computing device.

• Help with using TI graphing calculators is available in the Calculus Tutoring Lab.
• The use of electronic devices will not be permitted during exams or quizzes.

Labs:   The MATLAB assignments are a required part of the course. The assignments, due dates, and instructions on how to submit the assignments can be found here:

http://www.math.ucsd.edu/~math20d/

MATLAB Quiz:   There will be a MATLAB quiz given at the end of the quarter. The quiz will be held during your scheduled MATLAB time in AP&M B432. If you are unable to make the scheduled time, you will be able to schedule an alternate time online. The MATLAB Quiz can be used to replace one MATLAB assignment.

TritonEd Quizzes:  There will be FOUR quizzes that you will take through TritonEd. The first of these is a Syllabus Quiz (due on the Friday of Week 2). The remaining TritonEd Quizzes are actually surveys and your score is based on completion. They are only called quizzes to make it clear that they are required. The quizzes are:

• Syllabus Quiz:  A multiple choice quiz based on the syllabus. Due Friday, Oct 13 at 11:00 P.M.
• Start of Quarter Survey:  Due Friday, Oct 13 at 11:00 P.M.
• Mid-Quarter Survey:  Due Friday, Nov 03 at 11:00 P.M.
• End of Quarter Survey:  Due Friday, Dec 08 at 11:00 P.M. (Not yet released.)
The quizzes are accessed in TritonEd from the Quiz Folder in the Content area.

Exams:  There will be two midterm exams and a final exam. Check the  Course Calendar  for the exact dates of the midterm and final exams. You may use one 8.5 x 11 inch page of handwritten notes. (Both sides are okay, but no photocopies are allowed.) You may not use any other notes or any electronic devices. Please bring your student ID to the exams.

• You may bring ONE 8.5 x 11 inch sheet of handwritten notes. You may use both sides. (No photocopies!)
• No calculators will be allowed during the examinations.
• We will not be using Blue Books for exams this quarter.

Final Exams:

• It is your responsibility to ensure that you do not have a schedule conflict involving the final examination.
You should not enroll in this class if you cannot sit for the final examination at its scheduled time.
• You must pass the final exam ( >59% ) in order to pass the class. (The actual required percentage may be lowered, depending on overall class performance.)

Make-up Exams:  Make-up exams will not be given. If you miss a midterm exam for any reason, then your course grade will be computed using Method 2. (See below.)

• Method 1:   10% HW,   8% MATLAB,   2% Quizzes,   20% Midterm 1,   20% Midterm 2,   40% Final Exam
• Method 2:   10% HW,   8% MATLAB,   2% Quizzes,   20% Best Midterm Exam,   60% Final Exam

Note on MATLAB grades:  There are four labs. Each of these four is worth 2% of your grade (for 8% total). The MATLAB Quiz at the end of the quarter can be used to replace one MATLAB assignment.

After your weighted average is calculated, letter grades will be assigned based on the standard grading scale:

 A+ A A- B+ B B- C+ C C- D F [99,100] [93,99) [90,93) [87,90) [83,87) [80,83) [77,80) [73,77) [70,73) [60,70) [0,60)

We may adjust the scale to be more lenient, but we guarantee that the grade corresponding to a given percentage will not be lower than specified by the above scale. There will be no curve, but we may adjust the scale to be more lenient (depending on the overall performance of the class).

No extra credit will be given in this class.