## Contents

# MA 453 Fall 2008 Professor Walther

# News

**Final Exam Information_MA453Fall2008walther**

Here are some basic pointers:

- In order to do any editing, you must be logged in with your Purdue career account.

- If you look under MediaWiki FAQ, you get lots of instructions on how to work with Rhea. Some important things are under item 4 in that manual.

- If you want to do things like $ \sum_{i=1}^\infty 1/i^2 = \frac{\pi^2}{6} $ here then you should look a) at the "view source" button on this page and b) get acquainted with Latex [1], a text-formatting program designed to write math stuff.

Here is some more math, to show yo mathsymbol commands: $ \forall x\in{\mathbb R}, x^2\ge 0 $, $ \exists n\in{\mathbb N}, n^2\le 0 $ where $ {\mathbb N}=0,1,2,\ldots $

If you need to find out a latex command, google for the thing you want to make, latex, and "command". (E.g., google for "integral latex command".)

- If you want to make a new page, all you need to do is to invent one. For example, let's say I want to make a page for further instructions on how to deal with Rhea. I just type "double-left-square-bracket page with more instructions double-right-square-bracket", where of course I use the actual brackets. The effect is: I get a link (initially red) to a page that is the empty set. Once I click it, the link page with more instructions_MA453Fall2008walther turns blue and I am transferred to a newborn page of name as indicated.

Note: it may take a few minutes for the new page to start existing. If you click the red link and nothing happens, wait a bit and try again.

# Ideas what to put on Rhea

Course notes, HW discussion, solutions to problems you encountered while using Rhea (how do you upload, make links, post movies, ...)

For week 1, click this link here and on that new page create a page as outlined above. Then move to that page and state your favorite theorem. Why is it you favorite theorem? Have other people he same favorite theorem? Crosslink! Use the math-environment if appropriate.

For week 3: post and discuss the notion/theorem that you have found hardest to understand so far. Alternatively, find somebody else's post and reply to it by explainign how you understand things.

# Rhea Questions

# Course notes

Some Mathematics Symbols That We Need To Know

# Discussion topics

Mod p reducibility test_MA453Fall2008walther

Competitive Programming_MA453Fall2008walther

notation/theorems_MA453Fall2008walther

proof helps_MA453Fall2008walther

Example help_MA453Fall2008walther

possible discussion group on wednesdays..._MA453Fall2008walther

favorite math class at Purdue_MA453Fall2008walther

What to study for the final_MA453Fall2008walther

Can we make up missed weeks of rhea posts???_MA453Fall2008walther

Other Resources_MA453Fall2008walther

Math Puzzles_MA453Fall2008walther

# Homework Discussion

Homework 1, September 4

Homework 2, September 11

Homework 3, September 18

Homework 4, September 25

Homework 5, October 2

Homework 6, October 9

Homework 7, October 23

Homework 8, October 30

Homework 9, November 6

Homework 10, November 13

Homework 11, November 20

Homework 12, December 4

Homework 13, December 11

# Math News

2 new Mersenne primes have been found_MA453Fall2008walther

Math Ed Majors: New strides made for middle schoolers_MA453Fall2008walther

Math Skills Suffer in U.S., Study Finds... _MA453Fall2008walther

NCLB: Numbers Game - Graduates _MA453Fall2008walther

Judge Halts 8th Grade Algebra Test in California_MA453Fall2008walther

Einstein Proven Right_MA453Fall2008walther

Ads on Tests Add Up for Teacher_MA453Fall2008walther

U.S. students' math, science scores deliver mixed results_MA453Fall2008walther

# Interesting Articles

Proving 0.999... = 1_MA453Fall2008walther

The Art of Nomography_MA453Fall2008walther

Failing a Math Exam with Dignity! :)_MA453Fall2008walther

Some more of the above..._MA453Fall2008walther

What's special about this number? (kinda cool)_MA453Fall2008walther

Summer Math Program_MA453Fall2008walther

Using Math to explain how life on earth began_MA453Fall2008walther

Just look, it's funny. I promise._MA453Fall2008walther

Jay Walker's Library_MA453Fall2008walther

Ben Franklin's Magic Square_MA453Fall2008walther

Mathematics used to create Pixar's characters_MA453Fall2008walther

Do the Math Dance_MA453Fall2008walther

Mathematician Cracks Mystery Beatles Chord_MA453Fall2008walther

Gut Instinct's Surprising Role in Math_MA453Fall2008walther

If the World Could Vote_MA453Fall2008walther

Math Puzzles_MA453Fall2008walther

Estimating the Airspeed Velocity of an Unladen Swallow_MA453Fall2008walther

Certain Types Of Thinking Are Best Suited To Certain Types Of Problem-solving_MA453Fall2008walther

Mathematician Cracks Mystery Beatles Chord_MA453Fall2008walther

PRIME Mathematics Encyclopedia_MA453Fall2008walther

Oil Profit (something fun to do with a basic calculator)_MA453Fall2008walther

MatheMagic_MA453Fall2008walther

Einstein's Mistakes: The Human Failings of Genius' by Hans C. Ohanian_MA453Fall2008walther

Wikipedia definition of Abtract Algebra_MA453Fall2008walther

Math jokes_MA453Fall2008walther

Schools Chief: Schools deserve bailout, too_MA453Fall2008walther

Role of Women in Science and Engineering_MA453Fall2008walther

STORE CLOSINGS -- 2008_MA453Fall2008walther

Funds sliced, teacher sells ads on tests_MA453Fall2008walther

Freaky Math Trick_MA453Fall2008walther

'The world is moving past' USA in higher ed_MA453Fall2008walther

Using Challenging Concepts To Learn Promotes Understanding Of New Material_MA453Fall2008walther

Mathematics Students Make Prime Discovery_MA453Fall2008walther

US students improve in math_MA453Fall2008walther

# Latex comments

On fonts_MA453Fall2008walther

Reference Pages_MA453Fall2008walther - Websites that provide Latex commands

More Latex!_MA453Fall2008walther - Latex commands from NASA!