Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
30,474 
I found this problem, and I was wondering if I'm on the right approach.
Let G be a finite group on a finiste set X...

Dec1009 06:19 AM
rasmhop

1 
819 
Hi everyone.
How could I prove if something is a cyclic group? I was wondering because I can prove is something is...

Dec1009 02:45 AM
hamster143

1 
2,619 
I think that this is best suited here as it is linear algebra specific... sorry if I'm wrong.
Please look at:...

Dec1009 01:38 AM
hamster143

1 
792 
Hello all, I have recently been wondering whether there is a way to determine a fraction for which the decimal...

Dec909 02:23 PM
dylanbyte

3 
1,434 
What are they? And what does it mean to say that all elliptic curves are modular?
Trying to understand Fermat's...

Dec909 12:01 PM
Char. Limit

11 
1,997 
Hi!
This is my first post on this forum and I hope someone will be able to help me. I have an accelerometer...

Dec909 10:08 AM
pedro25

0 
4,173 
It is stated in almost every linear algebra text i could find that the inverse of a triangular matrix is also...

Dec909 04:13 AM
trambolin

1 
883 
Hello,
If f is a morphism between two vector spaces, we say it is linear if we have:
1) f(x+y) = f(x) + f(y)
2)...

Dec809 06:20 PM
DrGreg

7 
7,800 
Arrange the ff from greatest to least:
2^{110}, 3^{75}, 5^{49}
How could I use a modular method to be able...

Dec809 03:37 PM
yikboh

2 
2,940 
This test question is really boggling me and my math group. Any help would be appreciated. We know that AT*x=AT*b is...

Dec809 03:02 PM
hotvette

1 
1,135 
Prove that http://img705.imageshack.us/img705/2408/aaa12.png is irrational. A user on another forum suggested the...

Dec809 07:55 AM
g_edgar

7 
2,012 
Benjamin Crowell writes here, "The discontinuous transformations of spatial reflection and time reversal are not...

Dec709 08:15 AM
Rasalhague

2 
1,337 
How would one go about proving a particular subset of S4 is a normal subgroup of S4? Since S4 has 24 elements, I'm...

Dec609 05:03 PM
msd213

3 
4,621 
Suppose we put numbers (real numbers, not just integers) in a matrix like this:
a11 a12 a13 ... a1h
a21 a22 a23...

Dec609 02:19 PM
xisy

0 
1,477 
This is the other test problem that's killing my group. Any help is appreciated! Here's the problem:
Seven masses...

Dec609 01:52 PM
JoeSabs

0 
1,564 
In several places I have come across what seems to be a standard proof by contradiction that there is no greatest...

Dec609 09:50 AM
matheinste

14 
6,117 
I encounter a problem when simplifying the following equation, can anyone give a hint:)
Let A denote an orthonormal...

Dec609 07:11 AM
tom08

2 
2,407 
hi. i have recently become very interested in the idea of the nth roots of unity. i have discovered how to calculate...

Dec509 09:53 PM
Hurkyl

1 
1,223 
I've been sick with mono for the past month and am trying to catch up in my Algebra class, but being so far behind I'm...

Dec509 09:08 PM
HardBoiled88

0 
625 
My question is regarding abstract algebra.
Suppost that B is a 10cycle.
For...

Dec509 12:06 PM
Huyen Nguyen

3 
2,267 
I'm using this formula for my quaternion camera in OpenGL. It works perfectly but I didn't understand how it was...

Dec509 05:20 AM
sarah22

0 
1,044 
How do I take the cross product of Two 3x3 Matrices.
For example what is cross product of:
x

Dec409 09:09 AM
dellatorre

5 
9,689 
In short: does every vector space have a "standard" basis in the sense as it is usually defined i.e. the set...

Dec409 06:16 AM
HallsofIvy

4 
2,881 
My textbook doesn't seem to explain it clearly enough for me to comprehend. But from what I can see, after getting the...

Dec409 06:02 AM
HallsofIvy

2 
13,243 
Suppose that p and q are odd primes and p=2q+1. Suppose that
α∈ Z_p^*,α≢±1 mod p.
Prove that α is primitive...

Dec309 08:03 PM
robert Ihnot

4 
3,390 
dear all
how do you find the eigenvalues and eigenvectors of a complex matrix?
0 ; i ; ...

Dec309 04:02 PM
elibj123

1 
4,616 
Define T: F^2 > P_1(F) by T(a, b) = a + bx (with P_1 denoting P sub 1)
I usually prove problems such as this...

Dec309 08:10 AM
dmatador

2 
3,813 
Hello,
I wonder if somebody could point me to a book (preferably), or paper, link, etc. which explores the relations...

Dec309 02:01 AM
dodo

6 
2,093 
So I found the characteristic equation of a matrix, and I know the roots of the equation are supposed to be the...

Dec209 06:02 PM
CompuChip

1 
895 
Hello
Lately, I have been studying some group theory. On my own, I should add, so I don't really have any professor...

Dec209 05:30 PM
0xDEADBEEF

3 
858 
I have a vector of all ones in ndimensions. For example (1,1,1) in 3D. I want to find a invertible rotation matrix T...

Dec209 01:21 PM
bohdy

8 
1,874 
Hi guys just a quick question on how I would go about showing the units of Z21 is isomorphic toC2*C6(cyclic groups).I...

Dec209 08:53 AM
rochfor1

5 
889 
http://i45.tinypic.com/b7nfig.jpg
I started by saying
cince c = me mod n (1)
then me ≡ c mod n
Since...

Dec209 08:05 AM
Firepanda

0 
897 
I'm trying to follow some notes in class.
so the original equation is:
u=
and we let x=z+1.
Then by...

Dec109 09:47 AM
CompuChip

1 
920 
So I have a system of equations (composed of force and moment eqns) and I can split them up into matrices which will...

Dec109 03:30 AM
trambolin

9 
27,641 
Hello,
I am looking into proving that the Chinese Remainder Theorem will work for two pairs of congruences IFF a...

Dec109 02:01 AM
dodo

2 
2,367 
If we call <a> the "span" of a, then I need some clarification on the concept of span.
def. if G is a group and...

Nov3009 06:23 PM
kjartan

1 
778 
Hi, I have spme questions about Fermat's little theoremhttp://en.wikipedia.org/wiki/Fermat%27s_little_theorem.
I...

Nov3009 07:04 AM
Dweirdo

2 
1,201 
Ok so i was thinking about it recently, why do we use the decimal system as opposed to other counting systems in math?...

Nov3009 06:34 AM
hamster143

18 
3,145 
I am having trouble getting my head around typical arguments involving natural transformations. Is there anyway...

Nov2909 01:44 PM
icantadd

0 
661 