# Math 266 Ordinary Differential Equations: Section 111 & 121

## Course Information

• Instructor: Long Jin
• Email: long249@purdue.edu
• Lectures: MWF 8:30-9:20(111)/9:30-10:20(121) UNIV 103
• Office Hour: Tu 9:00-11:00, W 10:30-11:30, or by appointment, MATH 448
• Textbook: W. Boyce, R. Di Prima: Elementary Differential Equations and Boundary Value Problems 10e with WebAssign Plus 1 Semester Set
• Ground Rules
• Syllabus

## Homework

The homework consists of online homework problems (through WebAssign system, see instructions) and hand-graded homework problems.
The the assignment sheet is available on course webpage. Besides the problems in the textbook, there are also supplementary problems and three computer projects 1, 2, 3.
Hand-graded homeworks normally due on Wednesday (during class or office hour before 11 am) in the next week. See the schedule below for details.
The corresponding online homework due on the same day at 10 pm.
No late homework will be accepted!!

## Exams

• Midterm Exam 1: Feb. 27th (Tuesday), 6:30-7:30 pm, LILY G126, Solutions
• Midterm Exam 2: Apr. 5th (Thursday), 6:30-7:30 pm, MATH 175, Solutions
• Final Exam: May 3rd (Thursday), 1-3 pm, ELLT 116.

## Schedule

 Lectures Date Sections Homework due and other information L1 01/08 1.1 Slides L2 01/10 1.2, 1.3 L3 01/12 2.1 -- 01/15 --- Martin Luther King Jr. Day L4 01/17 2.2 Homework 1(L1-L3) 1.1-2,5; 1.3-8,11; 2.1-3,24; SP-A L5 01/19 2.2 L6 01/22 2.3 L7 01/24 2.3 Homework 2(L4-L5) 2.2-11,14,28,36; SP-B,C L8 01/26 2.4 L9 01/29 2.5 Slides L10 01/31 2.6 Homework 3(L6-L8) 2.3-1,2,16,21,22,29; 2.4-17,22ab; SP-D L11 02/02 2.7 L12 02/05 2.7 Slides L13 02/07 3.1 Homework 4(L9-L11) 2.5-4,22; 2.6-18; 2.7-20abd; SP-E,F L14 02/09 3.2 L15 02/12 3.3 L16 02/14 3.4 Homework 5(L12-L14) 3.1-19,22; 3.2-13,14,25; SP-G,H,I L17 02/16 3.5 L18 02/19 3.6 L19 02/21 3.7 Homework 6(L15-L17) 3.3-17,23; 3.4-15,25; 3.5-15,21a,22a L20-1 02/23 3.7 M1R 02/26 Midterm 1-Review Exam on 02/27, covering Chapter 1,2 and 3.1-3.4 --- 02/28 No class L20-2 03/02 3.8 Example L21 03/05 3.8 Slides L22 03/07 4.1.4.2 Homework 7(L18-L20) 3.6-15; 3.7-9,28; SP-J; Project 1 Answer L23 03/09 4.3 -- 03/12 --- Spring Break -- 03/14 --- Spring Break -- 03/16 --- Spring Break L24 03/19 6.1 L25 03/21 6.2 Homework 8(L21-L23) 3.8-7; SP-K; Project 2 Answer L26 03/23 6.3 L27 03/26 6.4 L28 03/28 6.5 Homework 9(L24-L26) 6.1-5b,8,15; 6.2-10,21; 6.3-1,2,18,21,23 L29 03/30 6.6 L30 04/02 7.1,7.2 M2R 04/04 Midterm 2-Review Exam on 04/05, covering Chapter 3,4 and 6 --- 04/06 No class L31 04/09 7.3,7.4 L32 04/11 7.5 Homework 10(L27-L29) 6.5-14ab; 6.6-4,5; SP-L L33-34 04/13 7.6,7.8 L33-34 04/16 Phase Plane Slides L35 04/18 7.9 Homework 11(L30-L32) 7.2-22,23; 7.3-17,20; 7.5-1,4; SP-M,N --- 04/20 Notes FR1 04/23 Final Review FR2 04/25 Final Review Homework 12(L33-L35) 7.6-2,6; SP-O,P; Project 3 FR3 04/27 Final Review