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

Feb2313 09:24 AM
micromass

1 
30,545 
I know the definition of the Abelianization and the most direct implications of this new group, but what I don't...

Mar2510 11:53 AM
Newtime

2 
1,693 
Hi
I have the following tensor and i need to reduce to a scalor quantity:
3 by 3 matrix
4150470.48 , 317.64,...

Mar2510 07:49 AM
frasool

2 
1,085 
Prove that the function B: L(V) > Mnxn(R) given by T > B is an isomorphism. B is the Bmatrix for T, where T is in...

Mar2410 05:23 PM
sweetiepi

2 
796 
Suppose I have a system of m equations in k unknowns
\begin{align*}
a_{11}x_1 + a_{12}x_2 + \cdots + a_{1k}x_k...

Mar2310 08:28 PM
e(ho0n3

4 
1,143 
How do you know if the solution set of a matrix is a point, line, plane or cube? How do you know the dimension of the...

Mar2310 05:24 PM
math_maj0r

2 
3,195 
Hello,
I have a pretty decent idea about how SVD works but when I look at some of the implementation details (for...

Mar2310 04:35 PM
pamparana

0 
604 
I hope someone can help me with this:
Let the the inverse A A^{1}=A^{1} A=I, where I is the identity operator....

Mar2310 12:51 PM
Fredrik

1 
751 
Hi, first off  Go easy on me, I'm only learning :redface:
My book is talking about linear independence.
As I...

Mar2310 11:47 AM
dacruick

9 
1,217 
Let R be a commutative ring with unity. I and J are ideals of R.
Show that If I + J = R, then I∩J=IJ.
I know that...

Mar2310 10:25 AM
emptyboat

1 
1,264 
Hi....
I was trying to project out the two dimensional rep of S3 from its regular representation by using the...

Mar2310 04:47 AM
krishna mohan

0 
1,060 
Q1:
Let A =
1 3 0
0 4 4
3 4 5
a) Find Cartesian equations for Col(A) and Null(A).
b) Are the columns of A...

Mar2310 03:43 AM
Eynstone

1 
1,052 
Can a non square matrix span?

Mar2310 03:39 AM
Eynstone

1 
557 
So I'm learning about Ring Theory and have gotten to Ideals. My book tells me that the product of two ideals I and J...

Mar2210 11:03 PM
Hurkyl

4 
2,511 
Hi
I'm a high school student. I gave a proof for the following theorem, but I was told by some professors that this...

Mar2210 02:34 PM
mumatics

2 
1,483 
Hello All
I have recently recovered from a 4 year hospitalization which pretty much ended my career as a computer...

Mar2210 08:28 AM
Gabriel...

6 
2,416 
G,H be groups(finite or infinite)
Prove that if (G:H)=n, then there exist some normal subgroup K of G (G:K)≤n!...

Mar2210 08:23 AM
emptyboat

3 
1,150 
Need to find all the posible solutions (a,b,c) for 1/a + 1/b + 1/c = 1, a,b,c integers.

Mar2210 04:56 AM
im_hoogiez

14 
17,071 
Hi there,
just a pretty straight forward query I need cleared up.....
If a question asks for the null space of A...

Mar2210 02:07 AM
canyonist

2 
707 
Hi guys,
I'm trying to show that \mathbb{F}_5/(x^2+2) and \mathbb{F}_5/(x^2+3) are isomorphic as rings.
As I...

Mar2110 08:54 AM
JackTheLad

4 
1,131 
How do we show that, given a matrix $A$, the sign of the determinant is positive or negative depending on the...

Mar2010 08:44 PM
quasar987

3 
1,012 
hey guys, im a student engineer and have found that the laws we use are primarily based off of stats. this has led me...

Mar2010 01:37 AM
robert2734

10 
1,849 
Hello,
Let's consider the L^2(\mathbb{R}) space with an inner product, and the complex sinusoids in the interval...

Mar1910 04:09 PM
jostpuur

5 
2,363 
I'm an undergraduate computerscience student doing research in the field of computer vision, and one of the tasks...

Mar1910 07:06 AM
mikeph

1 
3,705 
Hello people.
I'm a freshman in college and I'm looking forward to enter an advanced mathematics program. The...

Mar1810 01:26 PM
Hobold

9 
7,874 
If I want to know how many solutions a consistent linear system with more equations than unknowns has, how do I tell?...

Mar1810 06:49 AM
HallsofIvy

1 
3,230 
hi,
i was reading about finitely generated ideals
and there was a remark that ideal which consists of...

Mar1810 05:12 AM
mrbohn1

1 
1,524 
hi,
i want to show that If R is a PID then a submodule of a cyclic Rmodule is also cyclic.
do i need to use...

Mar1710 08:33 PM
mesarmath

2 
2,045 
I am having the hardest time proving that
"The product of any two even integers is a multiple of 4."
My proof...

Mar1710 04:02 PM
tinytim

1 
1,213 
Proving Axiom 1 of all 3 x 3 magic squares.
I used summation notation to do so but it is extremely long and...

Mar1710 09:31 AM
Zorba

4 
1,335 
How to prove that if A is a diagonalizable matrix, then the rank of A is the number of nonzero eigenvalues of A....

Mar1710 09:10 AM
Zorba

2 
1,065 
If A\in O(3) and v,w\in\mathbb{R}^3, then
(Av)\times (Aw) = (\textrm{det}\;A) A(v\times w)
is right, right?...

Mar1610 03:08 PM
Jmf

7 
3,196 
Take two rows of respective length m and n:
a1, a2, a3,..., am and b1, b2, b3, ..., bn.
Then produce as follows...

Mar1610 02:11 PM
mahch

6 
1,366 
Hey guys!
I am having a major brain problem today, with this problem.
L is a linear transform that maps...

Mar1610 11:03 AM
Takuya

4 
3,088 
Hello all,
I'm attempting to find in literature a method of determining from a Lie algebra's full root system in an...

Mar1610 10:53 AM
TIMRENNER

0 
1,019 
Hey I'd appreciate it if somebody could "yay or nay" my understanding of the following concepts, I think I'm mixing...

Mar1510 06:46 PM
sponsoredwalk

4 
950 
See the attachment///
Can Anyone Understand this???
I mean what metod has he followed to solve this equation for x...

Mar1410 07:28 PM
phymatter

2 
838 
given the sequence (power series) g(x)= \sum_{n\ge 0}a(n)(1)^{n}x^{n}
if i define ...

Mar1410 01:42 PM
g_edgar

3 
1,247 
Hi everybody,
I'm new to absract algebra and I really can not understand different between direct sum and direct...

Mar1410 11:58 AM
Landau

9 
7,026 
So an example was the matrix:
A = \left(\begin{array}{cccc}
a&a+b\\
b&0\\
\end{array}
\right)
is a...

Mar1410 11:52 AM
Landau

2 
2,284 
Definition: A primitive Pythagorean triple is a triple of natural numbers x,y,z s.t. x^2 + y^2 = z^2 and gcd(x,y,z)=1....

Mar1410 07:13 AM
Gokul43201

8 
3,686 