Winter 2012 Math 2A Home Page

Green Sheet
Homework list
Moldy Bread Experiment

Free online interactive slope field calculator.
Here's Wolfram Alpha.
Here is the Devaney Java Differential Equations software. See if you can download and install it.

Class 21, Wed., Mar. 21
We went over new material on infinite series solutions, also some new material on Laplace transforms of 2nd order equations and sines and cosines, and did a quiz on null clines.
Last homework is due on Monday: 4.1 to 4.3, 5.1 to 5.3, and 6.1 to 6.3.

Class 20, Mon., Mar. 19
We heard reports on projects.

Class 19, Wed., Mar. 14
We went over material.

Class 18, Mon., Mar. 12
We went over material from 4.2, 6.1, and 6.2
Here's homework from 5.3:
Ch. 5.3 HW: 1,3,9,10,18

Class 17, Wed., Mar. 7
Introduced Laplace Transforms, section 6.1.
Did more with Hamiltonian systems, section 5.3.

Class 16, Mon., Mar. 5
Sections 5.1 and 5.2

Class 15, Wed., Feb. 29
4.1 and 4.2

Class 14, Mon., Feb. 27
3.6 and 3.7

Class 13, Wed., Feb. 22
Exam 2

Class 12, Mon., Feb. 20

Class 11, Wed., Feb. 15, 2012
We went over homeowork for the rest of section 3.5, and also 3.6 and 3.7.
Do homework through section 3.7.
Exam 2 will take place during the first hour of next week's Wed. class (no school Monday, "Presidents' Day").
This will be very similar to the first exam in number and types of problems. It covers from section 2.2 to 3.5 (repeated and zero eigenvalues).

Class 10, Mon., Feb. 13, 2012
We went over sections 3.4 and part of 3.5.
Do homework for 3.4 and 3.5.

Class 9, Wed., Feb. 8, 2012
We went over sections 3.2 and 3.3.
Do homework for 3.2 and 3.3.
Turn in chapter 2 homework Monday.

Class 8, Mon., Feb. 6, 2012
We went over sections 2.4 and part of 3.1.
Do homework for 2.4, start on 3.1 homework.

Class 7, Wed., Feb. 1, 2012
We went over section 2.3 and the exam.
The moldy bread experiment will be due in two weeks, Feb. 15; if your bread is not moldy, then you should have gotten a lab partner during class!
Do homework through 2.3.
Here's how to do logistic regression on the TI-83 and 84.

Class 6, Mon., Jan. 30, 2012
We had exam 1. We will continue in chapter 2 on Wed.

Class 5, Wed., Jan. 25, 2012
We went over sections 1.9 and 2.1.
Exam 1 on Monday goes through section 2.1.
Turn in homework for chapter 1 on Monday also.

The link for the software is up there at the top of the page.

Class 4, Mon., Jan. 23, 2012
We went over sections 1.7 and 18. Please do homework through 1.8.
Read ahead sections 1.8 and 2.1.

Class 3, Wed., Jan. 18, 2012
We went over homework and sections 1.5 and 1.6.
Do 1.5 and 1.6 homework.
See the links above for the software. Wolfram Alpha also solves diff. eqns for you.
Here is the centimeter grid paper.

Check out these Summer Research Experiences for Undergraduates. They often provide stipends and genuine research experiences in a variety of science fields. A number of De Anza students have done them in recent years and enjoyed them!

Class 2, Wed., Jan. 11, 2012
We went over sections 1.3 and 1.4. Do homework for those sections!
Know how to solve y'=ky.

Class 1, Wed., Jan. 9, 2012
We went over material from chapter 1.1 and 1.2.
Do homework for 1.1 and 1.2