"...how it differs from the rocks"

Author: Jonas Reitz (Page 1 of 4)

Final Grades are posted

Hi everyone,

Your final exam grades as well as your overall average for the course are posted under Dashboard/OpenLab Gradebook.  To convert a course average to a letter grade, you can use the table on the  Syllabus page.  Your letter grades have also been submitted to CUNYFirst.

Best of luck to you all in your future studies,
Prof. Reitz

OpenLab #3: Advice for the future

(Due Tuesday, 5/21/19, at the start of class).  Imagine that you are invited to speak on the first day of MAT 2680, to give advice to entering students.  Write at least three sentences responding to one or two of the following, describing what you would tell them.

  1. What do you wish that you had been told at the start of this class, to help you succeed?
  2. Choose one topic in the course that is especially challenging. Identify it, and give advice to students trying to master that topic.
  3. What is the most important prior knowledge (not taught in the class) that you need in order to succeed?  Why is it important?

Extra Credit.  Respond to someone else’s comment.  Do you agree? disagree? Have anything to add?

Assignments Week 14

WeBWorK:  Assignments 14-InverseLaplaceTransforms, and 16-LaplaceIVP  are due Tuesday, 5/24, at midnight.
OpenLab:  OpenLab #3, Advice for the Future, is due on Tuesday, 5/21 (the day of the final exam).

OpenLab #2: Numerical methods PROJECT – Scoring Guide

Hi everyone,

Your overall grade (out of 20 possible) for the numerical methods project has been posted under Dashboard/OpenLab Gradebook.  The scoring guide that I used to assess your work is given below.  If you’d like more details about your score, please send me an email or ask me after class.

Prof. Reitz




20 points total (Written Assignment + Implementation)

WRITTEN ASSIGNMENT – OpenLab (5 points total):

  • 1 point – 300 words minimum
  • 2 points – Describe project & how it works, Describe process of building it (what tech did you use/why? Unexpected challenges?)
  • 1 point – Why do we need numerical methods?  Why is this assignment included in the class?
  • 1 point – include link or state you will send by email

IMPLEMENTATION (15 points total):

3 points: General setup
  • 2 points – Correct differential equation: dy/dx = x^2/(y-1)
  • 1 point – Correct initial condition y(-1)= -0.5
4 points: Euler’s Method
  • 2 points – functioning solution, displays x,y,f(x,y) at each stage
  • 1 point – correct x-target value
  • 1 point – four digits of accuracy after decimal:  y(2)=-1.87228… (will accept -1.8722 or -1.8723), optimum # of steps 11795
4 points: Improved Euler’s Method
  • 2 points – functioning solution, displays x,y,k1,k2 at each stage
  • 1 point – correct x-target value
  • 1 point – four digits of accuracy after decimal:  y(2)=-1.87228… (will accept -1.8722 or -1.8723), optimum # of steps 291
4 points: Runge-Kutta Method
  • 2 points – functioning solution, displays x,y,k1,k2,k3,k4 at each stage
  • 1 point – correct x-target value
  • 1 point – four digits of accuracy after decimal:  y(2)=-1.87228… (will accept -1.8722 or -1.8723), optimum # of steps 12

Assignments Week 12 & WeBWorK NEW FEATURE ‘MathQuill’

Assignments Week 12

WeBWorK: Assignments 12-Trench-EulerEquations  and 13-Trench-VariationOfParameters**  are due Tuesday, 4/30, at midnight.
** WeBWorK problem set 13 will be assigned no later than Tuesday, April 22, and will be due on 4/30.

OpenLab: None



New Feature in WeBWorK

WeBWorK now has “MathQuill” enabled by default, which allows more natural “pretty print” input for your answers.  You don’t have to do anything special to use it – once you click in an answer box, it will start working.  It will detect the mathematical symbols you type and display the answer correctly onscreen – (for example, when you type a fraction “/”, it automatically becomes a vertical fraction).  There is also a popup menu with common expressions such as radicals.

WHAT IF I WANT TO TURN THIS FEATURE OFF?  You can control this in WeBWorK under User Settings/Use live equation rendering.

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