Talk:08-401

something i still unclear on ideal test..

since there are two conditons in ideal test 1. a-b in A whenever a, b in A 2.ra and ar are in A whenever a in A and r in A

i just wonder when i use the ideal test, i need to use both condtions together

or just use one of both , then i can conclude a nonempty subset of a ring R is an ideal of R

thx

I would think both need to be satisfied. Sorin.c

thx so much

now, i have a tiny question, is the Z/n equal to Z_n? are they the same thing.

because the textbook give us the symbol " Z_n", and the lecture notes give us " Z/n"

there is any difference? BY the way, i just uploaded a picture , just follow the link please:

http://katlas.math.toronto.edu/drorbn/index.php?title=Image:08-401.jpg

There is no difference. Dror said he prefers writing $\mathbb {Z} /n$ instead of $\mathbb {Z} _{n}$. --Sorin.c 15:28, 27 January 2008 (EST)

Regarding Textbook

As I was about to do assignment 3 which was due yesterday... I realized that my textbook was missing several pages... obviously I couldn't do the assignment... and it looks like i am missing almost entire chapter 15... I didn't buy the textbook because a friend gave me a photocopied version... If I had known that there are pages missing, I would've bought one... I am wondering if anyone is willing to scan some pages for me... The pages are... pages 262-265, 286-293, 302-305... or, atleast please type up the questions that are due next week so I can atleast try to do the assignment... Thank you all!!!