C o o r d i n a t e s   (2,5,0)

Math 250: Differential Equations
Instructor: Joe Erickson (erickson@bucks.edu)
Textbook: Fundamentals of Differential Equations, 8th Ed., by Nagle, Saff, Snider
Term: Summer 2014

Announcements for Section E31

August 8 - Never mind, I've managed to carve out a block of time and got the exams graded in one swoop. Scores have already been sent out via BCCC e-mail. Many of you did a lot better than in past exams!

August 8 - Exam #3 scores will likely be sent out late tomorrow night (as in, after midnight). As for Exam 4, I'm setting the time limit to take it at 4 hours. It really shouldn't take more than 3 hours, however.

August 7 - Exam #3 and its key are in Resources.

July 18 - Exam #2 scores have been sent out by BCCC e-mail. I should point out that the old exams are just that: old exams. You cannot assume anything about an upcoming exam based on old exams, including for instance whether or not the Method of Undetermined Coefficients formulas will be on it, or the Method of Variation of Parameters formulas. On the other hand if you were in fact looking a lot at the Spring 2014 exams, then you already know that the undetermined coefficients and variation of parameters problems on this summer's exam were the same as those given in the spring. So, anyone objecting that I didn't put the formulas on the summer exam must be basing their objection on a close study of the corresponding exam from the spring; but, anyone making a close study of the corresponding exam in the spring should have had some idea of how to proceed with the relevant problems on the summer exam because they were the same! Anyway it looks like most people did all right on Problems 8 and 9 on Exam #2, at least in terms of the general set-up and execution. Now, what I will say is this: the table of Laplace transforms given in the spring exams will indeed be supplied on the next two exams this summer.

July 17 - Exam #2 and its key are now accessible in Resources.

June 24 - Exam #1 scores will be sent out in a day or two.

June 22 - Exam #1 and its key are now accessible in Resources (link below).

June 11 - Exam #1 should be available at the Newtown campus testing center by around noon on Wednesday, June 11. Check testing center hours before setting out, and also bring identification, a calculator, and writing instruments. You will not be allowed to use a cell phone or any other Internet-capable device as a calculator! Count on the exam taking up to 3 hours to complete. Good luck!

May 28 - The publisher does not offer any differential equations textbooks with MyMathLab accompanying it. The "higher-level" mathematics books tend not to have all the multimedia tassels and pinwheels that you find coming with, say, an intermediate algebra book. If you go much higher in mathematics, in fact, you'll soon enough encounter books that don't even have colored pictures in them! So we have to make do with what we got, because there isn't all that much out there that's better. One handy online reference besides my own website is paul's online notes.

May 27 - The course begins today. Start by reading the E31 syllabus (link below).

May 15 - Announcements for the Summer 2014 distance-learning section Math 250.E31 will appear in this box. Links to the syllabus and assignment sheet are below.

Math 250 Links