**Academic Conduct:** Your conduct in this course, as with all
BU courses, is governed by the BU Academic Conduct Code.
Copies of the code are available from the CAS Dean's office
(CAS 105) or
here..
Specifics rules for specific assignments will be discussed in lecture.

The "Golden Rule" of academic conduct is to "Give Credit Where Credit is Due". That is, if you use or consult a source, including a book, journal, web page or person, then cite that source (i.e., give sufficient information so that someone reading your work could determined what information you used and be able to find the source). The details of the form necessary in citation vary greatly from subject to subject, but the basic rule is universal.

**If you have any doubt about any aspect of proper citation or
academic conduct, ask.**

Who should take this class? (Prerequisites): I will assume that you have had, and remember, a full year of Calculus (i.e., Calculus 1 and 2). You will be expected to remember how to do derivatives and integrals and remember the basic ideas behind these operations. (While all other topics will be introduced "from scratch" those who have had Multivariable Calculus will have a definite advantage from chapter 2 on since you have had more practice with Calculus and you have seen vector fields.)

**Text:** Differential Equations by Blanchard, et.al.--Fourth
Edition

We will cover almost all of the first 4 chapters, some of chapters 5 and 6. The software code that comes with the text is useful, interesting and fun. It includes software to solve differential equations numerically, but this is available on the web in various locations (and you can write your own or use Mathematica or MatLab if you know these).

**Technology:** Information for the course will be
presented through the course home page and announcements will be sent
out to the official e-mailing list kept by the registrar. You
are responsible for making sure that email sent to the
email address kept by the registrar reaches you and that
you regularly check this email account.

Blackboard MAY be used, but only to post grades. Make sure you pick up and save all returned homeworks, quizzes, tests and labs and hang on to them until the end of the semester. This is the only way to verify that your recorded grades are correct.

You will need to do some numerics for this course. The CD that comes with the book is sufficient. Also, you can use software available at in java. You may use other web resources or write your own--but be sure to reference what software pagekage(s) you use.

**Special Note:** If you take notes on your laptop or other internet
enabled divise then you are required to email me a copy of your notes
within 15 minutes of the end of class.

**Grades:** During the semester you will accumulate points by
doing homework, labs, in class exams and the final. At the end of the
semester the points will be added with the weighting given below and
your grade will be determined based on the total points accumulated.
Correspondence between letter grades and point values will be announced
for the inclass exams.

Weights for components of the course work are as follows:

- Home work 20%
- Labs 10%
- In class Exams (2): 20% each
- Final: 30 %

Notes:

- Almost all students will do almost all of the homework and labs and take them seriously. The quickest way to lower your grade is to not do the homework or labs and/or hand in sloppy work.
- You will have one problem due at (almost) EVERY lecture (after the first). The solution of this problem should be written on ONE side of ONE sheet of paper, with your name written in the upper left corner. These problems will be graded 0,1 or 2 with 0 for nothing or nothing worthwhile handed in (i.e., your work is sloppy, does not follow the instructions for homework submission or clearly was not taken seriously). The goal of this daily problem is to work on "mathematical writing", so the grading will emphasize both content AND neatness AND clarity of exposition (which does not mean writing a lot, but does mean writing clearly and concisely in sentences).
- You will also have weekly homework assignments to be handed in as announced.
- NO late homework will be accepted for ANY reason. Your 3 lowest homeworks daily and 2 lowest weekly homework scores will be dropped. This policy is in place to cover situations when you are ill or otherwise unable to complete your homework. Do not use your "dropped" assignments for other reasons.
- You may send your homework with a classmate if you are ill or can not attend class for some other reason. Electronically submitted homework will NOT be accepted.
- There will be 2 or 3 "labs" during the semester. These are more extensive assignments that you write as a short paper.
- Midterms will be announced 2 weeks in advance.
- The Final will be at the official time scheduled by the registrar. No early finals will be given so make your travel plans accordingly.
- If you miss a class for any reason, be sure to get the notes from a classmate. Discuss what went on with the classmate. This will help both of you. I will not send out individual emails with homework assignments or information from missed classes. Kindness can not be legislated but cooperation can.

**Special Note:** If you take notes on your laptop or other internet
enabled divise then you are required to email me a copy of your notes
within 15 minutes of the end of class.

**Miscellaneous:**

**Study groups:**
I encourage you to form study groups and to spend some (not all)
of your study time with your group. Make **absolutely** sure that you
abide by the requirements of the Academic Conduct Code and the rules
for each assignment. In particular, you should write up your assignment
on your own. Papers which are too similar will be subject to action
under the Academic Conduct Code porcedures. Also, if you get a significant
idea or assistance from a tutor or a classmate, BE SURE to reference them
("Thank you to So A. So for suggesting I integrate by parts on problem
3.").

**Pedagogy:** I have heard it said that students learn approximately
5% of the material for a class in lecture. This is usually quoted to
justify doing away with lectures. However, about 5% of my body is my
head and I would not want to do without that.

In fact, I think that the 5% figure is about right. You learn mathematics by doing mathematics, doing exercises and writing up solutions carefully so that your answers can be easily understood. Being able to do problems is the goal. However, seeing examples and hearing the important points discussed before trying to do the problems yourself is much more efficient than reconstructing all the mathematics for yourself. So think of the lectures as how you prepare to do the exercises.

**Final comment:** Too many students consider their courses
hoops that they must jump through in order to reach a degree. This
philosophy implies that you only need to keep the material in your
head until the final. This is just wrong.

There are two goals for this course. The first is to learn the techniques involved in applying the Calculus (that you already know!) to the study of differential equations.

The second, and more important, goal is to provide you with a new and quantitative way of investigating the physical world. To be successful, you must train yourself to "see" differential equations in the world around you and to use that vision to give a new way of understanding and predicting behavior.