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Differential Equations
2250-4 home page
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After the first week, 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 bold-face, 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 11
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 in the "hw1.pdf" link.
hw1sols.pdf
Grading: 20 points, distributed as follows:
1.1: 6 = 2 points, 34 = 1 point, w1.1ab = 1 point each;
1.2: 15 = 2 points, 26abc = 1 point each, 32 = 1 point, 34 = 2 points; w1.2c = 2 points; w1.3b = 3 points, w1.3f = 2 points.
Due January 18
hw2.pdf
text1.3-1.5.pdf text sections, in case you don't have your text yet. There should also be copies of the text on reserve at Marriott Library.
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
hw2sols.pdf
Grading: 20 points, distributed as follows:
1.3-1.4 11 = 2 points, w2.1ab = 2 points each, w2.2bd = 2 points each.
1.4: 21, 42 = 2 points each; 46ab = 1 point each; 60 = 2 points (yipes!)
1.5: 24 = 2 points.
Due January 25
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. If you use an alternate software package like mathematica or matlab, upload the corresponding documents.
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
Grading: 20 points, distributed as follows:
1.5 38a = 1 point, b = 2 points, c = 1 point; 41a = 1 point, b = 2 points.
2.1 6, 10 = 2 points each, 23a = 1 point, b = 2 points; w3.1 = 2 points
2.2 w3.2 a = 1 point, b = 2 points, c = 1 point.
Due February 1
hw4.pdf
hw4sols.pdf
Grading: 20 points, distributed as follows:
2.2 w4.1 b,c = 2 points each; 2.2.23ab = 1 point each.
2.3 2ab = 1 point each, 10, 12, 13, 26 = 2 points each.
2.4-2.6 2.4.4, 2.6.4 = 2 points each.
Due February 4 Monday, at midnight
maplehw2.pdf Please submit your .mw Maple file on-line through our CANVAS page, as for your first project. This project can also be completed using Matlab. In that case, submit you .m files the same way. If you use other technology, consult with Professor Korevaar about how to submit your work.
maplehw2.mw open this file from Maple.
The jan29.mw class notes contain sample Maple code for Euler, improved Euler, Runge-Kutta loops...you may want to start with this code and modify it for your problems.
If you prefer to use Matlab, there are introductory notes about using Matlab, in the context of numerical solutions to DE's, on Professor Zhu's Math 2250 page from this spring and Victor Camacho's Math 2250 page from fall 2011.
Due February 8
hw5.pdf
hw5sols.pdf
Grading: 20 points, distributed as follows:
3.1 4 = 1 point, 28 = 2 points.
3.2 20 = 2 points, w5.1 = 2 points.
3.3 w5.2abcde = 1 point each; w5.3 = 3 points. 34 = 2 points.
3.4 10 = 1 point, 32ab =1 point each.
Due February 13 Wednesday (because our first midterm is Thursday)
hw6.pdf Chris will hold a homework problem session Tuesday 3:05-3:55 in JFB 102.
hw6sols.pdf
Grading: 20 points, distributed as follows:
3.5 w6.1a = 1 point, b = 2 points, cd = 1 point each, e = 2 points. w6.2 = 3 points.
3.6 w6.3abcde = 2 points each.
Due February 22
hw7.pdf
hw7sols.pdf
Grading: 20 points, distributed as follows:
4.1-4.3 w7.1bc, w7.2bc = 2 points each; w7.3a = 2 points, w7.3b = 1 point; 4.2.4 = 1 point, 4.2.6 = 2 points, w7.4, w7.5, w7.6 = 2 points each.
Due March 1
hw8.pdf
hw8sols.pdf
Grading: 20 points, distributed as follows:
4.4 w8.1ab =2 points each
5.1 12, 14 = 2 points each, w8.2 = 1 point.
5.2 8, 16 = 2 points each, 25 = 1 point, w8.3abc = 1 point each; w8.4efg = 1 point each.
Due March 8
hw9.pdf
hw9sols.pdf
Grading: 20 points, distributed as follows:
5.3 w9.1bcde =1.5 points each ( 1 point for hand work, 0.5 points for computer check) w9.2 = 1 point, w9.3b = 1 point, c = 2 points.
5.4 8, 10 = 2 points, w9.5abd = 2 points each.
Due March 22
hw10.pdf
EP3.7.pdf supplemental electrical circuits section, for hw. (It was already posted above, for Jan 25 hw.)
hw10sols.pdf
Grading: 20 points, distributed as follows:
5.5 w10.1bef = 2 points each; 52 = 2 points.
5.6 20 = 2 points; w10.2bc, w10.3ae, w10.4 = 2 points each.
Due March 27 Wednesday (because exam is Thursday)
hw11.pdf
hw11sols.pdf
Grading: 20 points, distributed as follows:
10.1 w11.1, w11.2 = 2 points each; w11.3a, w11.4a = 2 points each.
10.2 20 = 2 points.
10.3 20, 30, 34 = 2 points each; w11.6, w11.7a = 1 point; w11.7b = 2 points..
Due April 5
hw12.pdf Note: problems w12.5, w12.6 are postponed until next week.
EP7.6.pdf section on impulse functions and convolution applications
hw12sols.pdf
Grading: 20 points, distributed as follows:
10.4 30, 36, w12.1a = 2 points each
10.5 26, 34, w12.2 = 2 points each
EP7.6 w12.3 = 2 points
6.1-6.2 w12.4 a,c,e = 2 points each.
Due April 12
hw13.pdf
hw13sols.pdf
Grading: 20 points, distributed as follows:
6.2 w12.5b, w12.6 = 2 points each
7.1 26 = 1 point, w13.1abcdefg = 1 point each.
7.2 16 = 2 points.
7.3 w13.2a, w13.3, w13.4 = 2 points each.
Due April 19
hw14.pdf
hw14sols.pdf
Grading: 20 points, distributed as follows:
7.3 w14.1abc = 1 point each; d = 3 points.
7.4 8 = 3 points, 16 = 2 points, 18 = 3 points; w14.2ab = 2 points each, w14.3ab = 1 point each.
Due April 24 Wednesday (our last class lecture day)
hw15.pdf
hw15sols.pdf
Grading: 20 points, graded for completion:
9.1-9.2 w15.1abcd = 1 point each
9.3 w15.2abcd = 1 point each; w15.3ab = 1 point each.
9.4 10, 14 = 2 points each; second w15.3abcd = 1 point each; w15.4 = 2 points.
Due April 26 before midnight. This is an optional technology project that you can use to replace your lowest homework or technology score.
quakeproj.pdf quakeproj.mw