Differential Equations
Math 2250-4
Spring 2013
Homework Page

2250-4 home page
Department of Mathematics
College of Science
University of Utah

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