|
Differential Equations
2250-4 home page
|
|
Homework assignments will be posted on Fridays, a week before they are due - you will have a weekly quiz based on the homework problems and the concepts they test, at the start of class on Fridays. A subset of the weekly homework problems are underlined, and you will hand in carefully written up solutions to this subset for grading, also at the start of class on Fridays.
homeworkguidelines.pdf for written homework (thanks to Victor Camacho).
Due January 13
hw1.pdf
textsections1.1-1.2.pdf , for students who don't have their books yet.
texthw1.1-1.2.pdf, just the section 1.1-1.2 homework problems. Ignore the markings I've made next to various problems through the years - your correct assignment is the one shown above.
hw1sols.pdf solutions
Grading: 20 points, distributed as follows:
1.1: 36 = 1 point, 46 = 3 points, w1.1ab = 1 point each.
1.2: 20 = 2 points, 26abc, 30ab, 36, w1.2abc, w1.3abc = 1 point each.
Due January 20
hw2.pdf Postpone 1.5.33, 36, 38 until next week's hw.
text1.3-1.5.pdf text sections, in case you don't have your text yet.
hw2sols.pdf solutions
Grading: 20 points, distributed as follows:
1.3: 14, w2.1 = 2 points each; w2.2abcd = 1 point each .
1.4: 20, 40, 46, 54 = 2 points each
1.5: 20, 41 = 2 points each.
Maple Introduction: Read the .pdf's of the notes below. Open Maple, and use the "open URL" menu item to open the actual Maple worksheets (*.mw), and work through the examples they contain. Try to modify the example commands and see if you get what you expect. There is nothing to hand in from this portion of your assignment.
mapleintro.pdf
mapleintro.mw
maplecommands.pdf
maplecommands.mw
Professor Gustafson's Maple page which contains a different introduction to Maple (item 8), as well as a discount code for students who choose to purchase Maple (item 10).
Due January 27
maplehw1.pdf is part of your homework. Please submit your .mw Maple file on-line through our CANVAS page. (You access this through our Campus Information System www.cis.utah.edu.) Your file should be written so that when we use the "execute worksheet" option, all the output of your commands will regenerate. If you fear that your file may become corrupted during submission, you may also enclose a .pdf of the Maple file that includes all of the output. The last Maple intro sessions are in LCB 115 on Monday 1/23 9:30-10:30 a.m., 4-4:50 p.m.; Tuesday 1/24 11:35-12:25; Wednesday 1/25 3-3:50 p.m.
maplehw1.mw open this file from Maple.
hw3.pdf is the rest of your homework.
EP3.7.pdf supplemental electrical circuits section, for hw.
hw3sols.pdf solutions
Grading: 20 points, distributed as follows:
1.5: 36ab = 2 points each.
2.1: 12 = 2 points, 23a = 1 point, 23b = 2 points, w3.1 = 3 points
2.2: 23ab = 1 point each, w3.2 = 3 points.
EP3.7: 7a = 2 points, 7b = 1 point.
Due February 3
hw4.pdf
hw4sols.pdf solutions
Grading: 20 points, distributed as follows:
2.3: 2.3.2ab = 1 each, 10, 12, 13, 14, 17 = 2 points each; 24ab = 1 point each, 36ab = 2 points each.
2.4: 5= 2 points;
w4.1ab = 2 points each.
Due February 6 Monday, at 11:59 p.m.
maplehw2.pdf maplehw2.mw computer software project on numerical methods for solving DE's, sections 2.4-2.6. You may use Maple, Matlab or Mathematica. If there is other software you prefer to use, ask me. In all cases, upload your file(s) to CANVAS, with output removed and with comments or text fields explaining which problems are being answered.
If you use Maple, the Maple commands file linked at the first Maple assignment might be useful, as well as the notes from class on Tuesday January 31: jan31.mw jan31.pdf
If you use Matlab, you might find the links to a Matlab introduction, commands, and Euler method discussion helpful, on page from Victor Camacho's Math 2250-2 fall 2011 home page.
Note: I will be in my office LCB 204 on Friday Feb 3 p.m. from 1-4 p.m. If you're working in the Math Student center lab and the lab assistants can't help you, please come by my office (or call it at 581-7318), and I can come to the lab and give suggestions. I've also reserved the Marriot Mac lab 1745 on Saturday from 1-4 p.m., and will be available there if you wish to work on (and hopefully complete) your project assignment then.
Due February 10
hw5.pdf
hw5sols.pdf solutions
Grading: 20 points, distributed as follows:
3.1: 16 =1 point, 24 = 2 points, 34 = 3 points;
3.2: 20= 2 points;
3.3: 34 = 2 points.
3.4 10 = 1 point, 32a = 1 point, 32b = 2 points, 40ab = 1 point each, w5.1bc = 2 points each.
Due February 15 Wednesday (exam Thursday)
hw6.pdf Kishalya will hold a homework problem session in LCB 215, Tuesday 3:30-4:30.
hw6sols.pdf solutions
Grading: 20 points, distributed as follows:
3.5 w6.1ab =1 point each, cd = 2 points each; w6.2, p 201.6 = 2 points each;
3.6: 6 = 2 points, w6.3abc = 2 points each, de = 1 point each.
Due February 24
hw7.pdf postpone w7.7, w7.8 until next week.
hw7sols.pdf
Grading: 20 points, distributed as follows:
w7.1bc = 2 points each; w7.2a = 1 point, b, c = 2 points each; w7.3ab = 1 point each.
4.2.4 = 1 point; 4.2.6, w7.4, w7.5, w7.6 = 2 points each.
Due March 2
hw8.pdf
hw8sols.pdf
Grading: 20 points, distributed as follows:
w8.1abc = 2 points each.
5.1: 12 = 2 points.
5.2: 8, 16 = 2 points each. w8.3bcfg = 2 points each.
Due March 9
hw9.pdf In an earlier version of the hw, the value of damping coefficient "c" in w9.3d was given as c=5. It should be c=10. Also, I decided that w9.1e was harder than necessary as written, so I've changed it to y(7)+8y(5)+16y(3)=0 rather than the original y(7)+4y(5)+16y(3)=0.
hw9sols.pdf
Grading: 20 points, distributed as follows:
5.3: w9.1abcde = 1 point each, w9.2 = 2 points.
5.4: 10 = 3 points, w9.3abcde = 2 points each.
Due March 23
hw10.pdf
hw10sols.pdf
Grading: 20 points, distributed as follows:
5.5: w10.1 c= 1 point, d = 2 points, e = 1 point, f = 2 points; 43 = 2 points.
5.6: 22, w10.2ab, w10.3be, w10.4 = 2 points each.
Due Wednesday March 28 because our second exam is Thursday
hw11.pdf
hw11sols.pdf
Grading: 20 points, distributed as follows:
10.1: w11.1, w11.2 = points each; w11.3ab, w11.4ab = 1 point each.
10.2-10.3: 10.2.2= 2 points, 10.3.20 = 3 points, 10.3.30 = 3 points; w11.5a = 2 points, w11.6 = 2 points.
Due April 6
hw12.pdf
EP7.6.pdf Edwards-Penney section on impulses and the delta function.
hw12sols.pdf
Grading: 20 points, distributed as follows:
10.4-10.5: 10.4.26, 36 = 2 points each. w12.1a, 12.2, 12.3 = 2 points each.
6.1-6.2: w12.4abc = 2 points each; w12.5ac = 1 point each, b = 2 points; w12.6 = 1 point.
Due April 13
hw13.pdf
hw13sols.pdf
Grading: 20 points, distributed as follows:
7.1: w13.1abcdefg = 1 point each.
7.2: 16 = 2 points, 25 = 1 point.
7.3: 34 = 4 points, w13.3 = 3 points, w13.4 = 3 points.
Due April 20
hw14.pdf
I updated the Maple commands file to include some systems of differential equations:
maplecommands.pdf
maplecommands.mw
hw14sols.pdf
Grading: 20 points, distributed as follows:
7.3: w14.1 b = 1 point, d = 4 points, e = 1 point, f = 2 points.
7.4: 2 , 8, 12, 18, w14.2a, w14.4 = 2 points each.
Due April 27 by noon.
hw15.pdf
hw15sols.pdf
Grading: 20 points, distributed as follows:
9.1-9.3: w15.1 ab, w15.2abcd = 2 points each.
9.4: 14 = 2 points; w15.3bc, w15.4 = 2 points each.
Due April 30 Monday. Optional (extra credit) earthquake project, to be submitted by midnight.
quakeproj.pdf quakeproj.mw