MA 226 Differential Equations

MA 226 - Differential Equations

Course Information

Lecturer: Ryan Goh
Lectures: Monday, Wednesday, Friday, 10:10am-11 am; CGS 511
Office Hours : MCS 243, M 11a-12p T 2-4p, or by appointment (please provide your availabilty when contacting me).
Syllabus page here
Textbook: "Differential Equations," 4th edition, by Blanchard, Devaney, Hall, Second Edition. A link to the textbook can be found here.
You will also need a copy of the DE tools software that comes with the textbook, this can be downloaded for free on the publishers website . Note you will need Java runtime software (v8) to run this software.

Course Announcements

I will post any important updates here.
  • The post outlining office hours (including Zoom IDs) for the last week of class and reading period, review session, as well as full logistical details of the final can be found in the "Midterm and Final" tab.
  • Due to the patriots day change, my office hours for the week of 4/20 are Tuesday 11a-12p and 2-4p.
  • My office hours for the rest of the semester will be the following: Monday 1p-2p, Tuesday 2-4p. See the announcement window on the blackboard site for the Zoom ID links.
  • My office hours for the week of 3/30 are changed to the following : Monday 11a-12p (will just continue the zoom session for the lecture), Tuesday 2:30-5pm (see Blackboard for zoom links). Also, full logistics and details for midterm 2 can be found in the "Midterm and Final" tab in blackboard.
  • My office hours for the week of 3/23 are changed to the following (see Blackboard for zoom links): Monday 1 - 2:30, and Wednesday 1:30-3. Also note that Homework 7, is now due Thursday, 3/26 at 10am.
  • (!!!---IMPORTANT---!!!): Please carefully read everything on this page for changes to how the course will be run due to BU's remote-learning policies in response to the COVID-19 outbreak. More updates will follow as further guidance is provided.
  • Here's a lovely article telling the story of the ``Hidden Heroines of Chaos."
  • I've posted a practice exam for Midterm on the blackboard website (under the "Notes with gaps and other content" tab). Note this is a practice exam from a course where the exam time was 60 minutes.
  • There is no class on Feb. 17th, President's day. Tuesday, Feb. 18th has a monday schedule, so we will have lecture, and Monday discussion sections (A2 - A4) will meet at their scheduled times on that date. The Tuesday discussion sections, A5 and A6, will not meet and thus will not have a quiz and students in those sections do not have to turn in the homework.
  • My office hours on Wednesday, Feb. 12, will be from 2:30-4pm.

    Homework

    Now due on blackboard (see remote-learning instructions above) on Wednesdays, 10am. See these links for guidelines and an example of a homework solution.
    Week due Reading Assignment Suggested problems
    1/27 Section 1.1, 1.2 None this week Pg. 14-17 # 2,4,5,6,7,12; Pg. 33-34 #1,2,6,13,17,25,28,40
    2/3 HW 1: Section 1.2, 1.3,1.4 Pg. 33-36 #40 ; Pg. 47-51 #10,13,14; Pg 61-63 #6,11 (note: a spreadsheet which runs Euler's method, for two example diff. eq.s can be found here in Excel format and in Mac Numbers format ); Pg. 33-36 #35,37,39; Pg. 47-51 #2,6,7,9,16,19; Pg 61-63 #2,3,10,17;
    2/10 HW 2: Section 1.5,1.6,1.7 Pg. 72-73 #11, 16; Pg. 89 - 93 #4,16,26; Pg.106 -107 #4; Pg. 72-73 #1,5-8, 13,14,18; Pg. 89-93 #1,2,7,9,21,28,29,32,34,36, 39; Pg 106-107 #2,7,13;
    2/17 HW 3: Section 1.7, 1.8,1.9 Pg. 106 - 108 #11,19 ; Pg. 121 - 124 #4,12,17 ; Pg. 133 - 134 #4,10; Pg. 106 - 108 # 9,12, 13,15,18,19; Pg. 121 - 124 #2, 6, 7,9,11,16, 19-22,25,29; Pg. 133 - 134 #1,6,9,10;
    2/24 HW 4: Section 1.9, Chapter 1 Review Pg. 133-134 #12,17,19 ; Pg. 136-141 #36,51; Pg. 136 - 141: Any of the problems in the Chapter 1 review
    3/2 HW 5: Section 2.1, 2.2,2.3 Pg. 161 - 166 #1,4,8,20;
    Pg. 178 - 183 #6,8,16;
    Pg. 187-188 #6;
    		 Pg. 161 - 166 #1-4,7,9,15,16,20,21,22,23,24;
    Pg. 178 - 183 #1-6,7,10,11,19;
    Pg. 187-188 #5;
    3/18, 10:00AM HW 6: Section 2.3-2.6 Pg. 187-188 #7,
    Pg. 194-195 #2,6, 13;
    Pg. 202-204 #1,2; An apple/mac spreadsheet which runs Euler's method for a 2D-system can be found here, and an Excel version here
    Pg. 208-209 #3-5;     		Pg. 187-188 #8,9
    Pg. 194-195 #5,7, 9,13;
    Pg. 202-204 #4,6;
    Pg. 208-209 #1,2,9,10;
    3/26, 10:00AM HW 7: Section 3.1 - 3.3 Pg. 258-264 10, 16,24,33;
    Pg. 277-280 2,6,16,19;
    Pg. 293- 296 2,4,27;     		Pg. 258-264 1-4,6-8,12,15,17, 20-23,25, 26,31,34,35;
    Pg. 277-280 1-8,11,14,17,18, 21,23;
    Pg. 293-296 1-9,12;
    4/1, 10:00AM HW 8: Section 3.3-3.6 Pg. 295-296 20,21
    Pg. 310-314 2,4,6,10,12,
    Pg. 327-330 2,6
    Pg. 342-346 15, 16
    		Pg. 295-296 19,
    Pg. 310-314 1,3,5,7,9,11,13,15,19,21, 23
    Pg. 327-330 4,8,10-13,16,17-19,20-23
    Pg. 342-346 13-28,
    4/8, 10:00AM HW 9: Section 3.7, 4.1 Pg. 358-360 2,4,11
    Pg. 399-402 14,20
    		Pg. 358-360 3,9,10,12,13
    Pg. 399-402 9,11,13,15,25,27, 28
    4/15 HW 10: Section 4.1-4.4 Pg. 399-402 28
    Pg. 412-414 2,4,15
    Pg. 424-426 4,10,16
    Pg.436-438 2,4,6,
    		Pg. 399-402 33,35,37
    Pg. 412-414 5-9,16,17,21,22
    Pg. 424-426 12,15,16,21
    Pg.436-438 3, 7,9
    4/22 HW 11: Section 5.1,5.2 Pg. 472-477 1,4,17,22
    Pg 487 - 490 6,21,22
    		 Pg.472-477 2,11,13,20
    Pg 487 - 490 1,3,5,13
    4/29 HW 12: Section 6.1, 6.2 (and 6.3) Pg. 577-578 16,
    Pg. 585-587 4,10,11

    		Pg. 577-578 2,4,8,18,19,21
    Pg. 585-587 1,2,4,7,9,11, 15,
    Pg. 599-601 1-4, 6-8, 11,12,15,16,27,29-31
    No due date Selected problems from chapter reviews Note these are not exhaustive problems for you to review, and just meant to guide you and get you started with studying. Homeworks, quizzes, past exams, and other problems in the chapter reviews are good places to study. CH 1 10,14,19,20,23,37,42,43,49
    CH 2 2, 7,8,16,20,31,32,33,35,36
    CH 3 1,2,4,12,19,20,21,25,31
    CH 4 2,3,12, 21,23,25
    CH 5 1,4,5,8,12,15,16,19,20
    CH 6 1,11, 12,16,19,26,27

    Midterm and Final information

    There will be two midterms during the semester. They will be held during lecture, in the regular location, on Friday, Febuary 21st and Wednesday, April 1st. Logistics of each exam will be discussed during class. The tentative date for the final exam is Tuesday, May 5 9:00am – 11:00am, in the normal lecture location CGS 511. No early finals will be given and please plan your end-of-semester travel accordingly.

    Grades

    Your course grade will assigned as follows
  • Homework scores (10%) - two lowest scores dropped
  • Quizzes (10%) - two lowest scores dropped,
  • Midterm 1 (20%)
  • Midterm 2 (25%)
  • Final exam (35%)




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