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UNIVERSITY OF MIAMI
 

Kenneth L. Baker
k.baker@math.miami.edu
http://www.math.miami.edu/~kenken/

Ungar 407, 305.284.2160
Department of Mathematics
University of Miami

Math 311 - Q - Intro to Differential Equations

Tues/Thurs 12:30PM - 1:45PM, Dooly Memorial 316


Office Hours: Wednesdays 1-3pm and by appointment

Course Description: We will study the theory and applications of ordinary differential equations (ODE): first-order ODE, linear ODE, obtaining solutions of ODE as series, the Laplace transform.
Text: Differential Equations and Boundary Value Problems, 4th Edition, Edwards and Penney
Content: We will cover sections 1.1-1.5, 2.1-2.3, much of chapters 3 and 7, parts of 4,5,6.

Exams: There will be three exams and a final.
      Exam1. TUES Sept 16    Exam2. TUES Oct 14    Exam 3. THURS Nov 13
      Final THURS Dec 11 (Set by registrar)
You will be responsible for the material covered in the lectures, the readings, and the homework.
* Dates of Exams are subject to change.

Homeworks: Homework will be assigned below. It will be due at the beginning of class on Thursdays. No late homework will be accepted. Your lowest homework grade will be dropped.

Final: Optional. Course grad calculation depends on if you elect to take the final.

Grades: Depends on whether or not the Final is taken.
Overall Score = Hwk 20% + Exam1 20% + Exam2 20% + Exam3 20% + Final 20%
Overall Score = Hwk 25% + Exam1 25% + Exam2 25% + Exam3 25%
Letter grades will approximately follow standard cutoffs A>90, B>80, C>70.

Academic Honesty: Each student will uphold the University of Miami Honor Code.


Homeworks and Notes

Math Lab Schedule (Free drop-in tutoring)

dfield and pplane - Java applets for direction fields and phase portraits
    Example outputs as pdfs: y'=x^2-y^2 ; y'=x^2-y-2 ; y'=y-sin(x) ; x' = t * sin(x)

Due Date Readings Problems
Aug 28 1.1 1.1: # 3, 9, 15, 19, 22, 47 (scans of problems - pdf)
Sept 4 1.2-1.4 1.2: # 9, 13, 19, 25;
1.3: # 3 (y'=y-sin(x), see also this), 9 (y'=x^2-y-2), 21, 27
1.4: # 1, 13, 23, 64;
(scans of problems - pdf. These two might be difficult to read.
1.4.13: y^3 dy/dx=(y^4+1)cos x,
1.4.23: dy/dx + 1 = 2y, y(1)=1 )
Sept 11 1.5, 1.6 1.5: # 11, 21, 32
1.6: # 11, 23, 35, 37, 49, 58, 66, 67
(I added 1.5.32, 1.6.37, and 1.6.58.)
(scans of problems - pdf)
Sept 18 Exam
2.1, 2.2
EXAM1 Tues Sept 16
No HWK due.
Sept 25 2.3, 2.4 2.1: # 7, 11, 23, 25;
2.2: # 5, 9, 13, 21, 23, 24;
2.3: # 1, 11, 15, 16;
2.4: # 3, 5
Oct 2 3.1, 3.3 3.1: # 11, 16, 24, 25, 35, 39, 43; 
3.3: # 10, 12, 15, 25, 28, 39
(Note: 3.3:31,40,42 are deferred to next time; they are replaced with 3.3:28,39)
Oct 9 3.3, 3.5 3.3: # 31, 40, 42
3.5: # 1, 4, 6, 10, 13, 18, 34, 37
Oct 16 Exam Practice Exam - pdf
Practice Exam Solutions- pdf That's most of them, not all.

EXAM2 TUES Oct 14
FALL RECESS Thurs Oct 16

Oct 23
Oct 28
3.4, 3.6, 3.7 Due Tuesday October 28
3.4 # 4, 15, 17, 18
3.6 # 1, 7, 11, 19
3.7 # 1, 2, 17
Oct 30 4.1, 4.2
(pp 250 - 253, 259-260)
4.1 # 17 ; 4.2 # 2
(You may use pplane to sketch direction field and solution curves.)
Nov 6 5.2, 5.4, 6.1
(pp304 - 308, 311-313, 334 - 337, 371-374)
5.2 # 4, 6, 8, 11
5.4 # 1, 5
6.1 # 1, 3, 5, 7
Nov 13 Exam

Practice Exam - pdf

REVIEW Tues Nov 11
EXAM3 THURS Nov 13

Nov 20 6.2, 6.3;
(pp 384-390, 399-408)
Due Dec 2
6.2 #21  (phase portrait near origin only), 33;
6.3 #27, 29, 31
Nov 27 THANKSGIVING RECESS
Dec 4 7.1, 7.2
(pp 441-445, 452-456)
Due Dec 9
7.1 #3, 7, 9, 13, 25, 29
7.2 #6, 11, 33
Dec 9 7.3, 7.5, 7.6
(pp   465-471, 482-488, 494-498)
Not Due
7.3 #3, 6, 8, 37; 
7.5 #13, 26 (not on final);
7.6 #5 (not on final)

Optional Final
Final overview
Table of Laplace Transforms (pdf)


Slope Fields

Mathematica Demonstrations for Visualizing Differential Equations

Chaotic Systems