Math 307C - 2013

Math 307 C - Introduction to Differential Equation – Winter 2013

MWF 10:30-11:20, THO 119

(Please PRESS F5 to refresh the page. Last modified of the website: 3/23/2013 3:02 PM)

Instructor: Huy Tran

Office: C-018, Padelford Hall, next to the C-wing elevator, Lower Level (LL), same floor with Student Service Office.

Email: tvhuy at math dot washington dot edu

Office hours: Thurs, Fridays 11:30-12:30 in Math Study Center CMU-B014.

The room is to the right of the reception desk. Please check other office hours below.

Homework has to be neat, readable, and stapled!

Do following problems but turn in those in [brackets] only

HW 7 (due Fri 3/8): 1 credit to in-class working for those who do all problems. The solution has to be nicely written (readable). Please email me if you do that. Due Fri 3/8, sharp!

          6.1: 3, 8, 9, 10, 12, 13, 14, [17], 18
          6.2: 2, 4, 6, [8], [10], 12, 14, 16, [18], 20, 22
          6.3: 2, 6, [10], 12, 14, 16, [18], 20, [22],[23]

HW8, no turn in:
6.3: 4, 8
6.4: 1a-13a

HW 6 (due Fri 3/1):
6.1: [1],[5abc],[7],[11],[15], [16],~~[19]~~

HW5 (due Fri 2/22):
          3.4: [30]
          3.5: [16]
          3.7: 5, 7, [10], 17,
          3.8: [5], [9], 10, 11a, 18a
HW4 (due Fri 2/15):
          3.3: 35-38, [36], [2,3],[12]
          3.4: 23-30, [27], [28], [6]
          3.5: 1-17, 19a-26a, [17], [21a]

HW3 (due Fri 2/8):
3.1: 1,3,5,7,9,11,13,15,17, 20-24, [12,13],[17],

3.3: 1-6, 7, 9,11,13,15, 17-22 (solve and describe, don’t sketch), [19,20],

3.4: 1,3,5,7,9, 11-14 (solve, sketch and describe), [16], [14]

HW2 (due Wed 1/23):

2.2: 1 to 8, 9(a,c) to 20(a,c), 21 to 25, 27a, 28a, 31b to 38b, [13ac], [25], [31 b],

2.3: [2], [3], [9], 13, 21(ab)

2.7: read example 1 and expl 2; 1a to 4a, [3a]

HW1 (due Mon 1/14):

section 2.1: 5c, 7c, 8c, [11c], [16], 20, 22, [30]

section 2.2: 7, [8], 9(a), 13(a), [18(a)], 24, 28 a

Announcement:

· [3/23] Hint for the final. Grades are uploaded. 50% for 2.0, 60% for 2.8, 90% for 4.0. Best wishes to all of you.

· [3/22] Final exam

· [3/13] Solution for the in-class problem today. The difficulty of this problem is medium. There will be 2-4 easy, 2-3 medium, 2-3 hard problems in the final.

· [3/12] Review session run by CLUE, this Sunday 8pm-10pm, MGH 238.

· [3/11] If you have questions about final, please email me.

· [3/6] Information about final: scroll down to see…

· [3/2] Psy curve: http://www.wolframalpha.com/input/?i=PSY+curve. A lot of unit step functions (Heaviside functions) are used to describe Psy curve.

· [2/27] Note for partial fraction decomposition

Problem 6.1.19 is replaced by 6.1.15.

· [2/24] Preliminary final score: 2.0 for 50%, 2.8 for 60%, 4.0 for 95%, linearly in between.

· [2/22] Midterm 2 and solution and statistics.

· [2/15] The in-class problem today is a part of problem 3.5.18.

Problems to practice for midterm 2: all hw that I assign (see left col.), lecture notes. There will be 5 problems: 2-3 problems related directly to hw and lectures, 1-2 medium problems, and one hard problem. I expect each problem takes 8-15 mins to solve. The hard one takes less than 10 mins if you figure out the trick.

When praticing, don’t forget to check the amount of time you do.

· [2/8] Please read examples 1 to 5 in Section 3.5.

· [2/3] MathAroundCampus, Friday, February 8, 2013, 2:30pm Kane Hall 210

· [2/1] Note that the midterm 2 is on Friday Feb 22^nd.

· [1/30] Midterm 1 and solution. Here is the midterm’s statistic.

You are welcome to send an anonymous feedback to me.

· [1/28] Hint for the in-class problem today. Note that this is similar to problem 2.1.31.

· [1/25] Please read the syllabus again for information about note and calculator in the exams.

· [1/23] Problems to practice for chapter 2:
Section 2.1: part (c) of 1 to 12; 13 to 20; 27 to 32.

Section 2.2: 1 to 8; 9ac to 20ac; 21 to 28; 31b to 38b.

Section 2.3: 1-4, 5a, 8ab, 9, 10ab, 11, 13, 15b, 20-24, 26a, 28ab,

Section 2.4: 27, 28, 29, 30.
Section 2.5: 1 to 13, 15, 16a, 17a, 20ab, 21 ab.

Section 2.7: (a), (b) and (d) of 1 to 4

· [1/22] Matt from CLUE will be presenting a review for math 307 on Sunday, 27 January, from 8 to 10 pm in MGH 234.

· [1/16] correction: do 2.3.21ab instead of 2.3.29.

· [1/14] 18 people did correctly the second in-class problem.

· [1/10] – Correction: do [11c] in hw1 not [11].

- Partial fraction note

· [1/5] Prerequisites for the course.

-Program to draw direction fields: http://alamos.math.arizona.edu/ODEApplet/JOdeApplet.html

-Example to type in: dy/dx = 1/2*exp(x/3)-y/2

min x: -1, max x: 6; min y: -2, max y: 4

-Also try to click on the graph. Compare with Figure 2.1.1 page 56

Shared office hours in MSC:

M 12:30- 1:30 Austin Roberts
M 3:30- 4:30 Peter Caday
M 5:00- 6:00 Wai Tong "Louis" Fan

T 1:00- 3:00 Mary Radcliffe
T 3:30- 5:30 Lindsay Erickson
W 11:30- 12:30 Austin Roberts

Th 11:30-12:30 Huy Tran
Th 12:30- 2:30 Christian Rudnick
F 10:30-11:30 Peter Caday
F 11:30-12:30 Huy Tran

Information about the final (updating):

- 8-9 problems: 4-5 from chapter 6, and 4 from ch 2 and 3.
- One table of integration is provided (the same as midterm 1 and 2).
- Table 6.2.1 of Laplace transformation is provided.

- No question on 2.5-2.7.

- two-sided sheet of note and a calulator are allowed. NO other cheating ~_~!
- Review all problems that I assigned (not only those in brackets)

- Review previous final exams.

- Sleep well the night before exam.

- Take a deep breath before a difficult problem.

Course resource

-Prerequisites, integral table

-syllabus and calendar

-syllabus from department

-discussion board

-CLUE: UNDERGRADUATE STUDY/TUTORING CENTER

-Student Counseling Center, which offers individual and group counseling, and workshops on topics such as test anxiety and time management