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

Feb2313 09:24 AM
micromass

1 
30,541 
For the transposition (i j)(k), this is what I have in my notes:
(i j)(k) = k if k is not equal to i or j
(i j)(k)...

Jan3013 08:55 AM
Artusartos

2 
560 
Page 5 in this link:
http://doctorh.umwblogs.org/files/2010/10/honors_brown.pdf
I couldn't really understand...

Jan3013 08:47 AM
Artusartos

4 
768 
hi ,
this result is from text , Abstract Algebra by Dummit and foote .
page 120
the result says , if G is a...

Jan2913 01:16 PM
Maths Lover

6 
790 
Hello,
it is known that "Every regular Gaction is isomorphic to the action of G on G given by left...

Jan2813 04:09 PM
mnb96

2 
743 
I am currently looking at a number sequence to solve a puzzle. I have identified the following with the sequence:
...

Jan2813 04:12 AM
dodo

2 
995 
Let y=Ax. A is a matrix n by m and m>n. Also, x gets its values from a finite alphabet. How can i show if the mapping...

Jan2713 04:47 PM
acco40

3 
719 
If you consider a bounded linear operator between two Hausdorff topological vector spaces, isn't the kernel *always*...

Jan2713 11:15 AM
micromass

1 
905 
My book goes on to say:
"If we consider both C^n and C^m with norms, then we define the norm of an M x N matrix A...

Jan2713 08:23 AM
Fredrik

4 
875 
hi,
I understand how to do the rotation equation
A =
A*v = y ] xsinθ + ycosθ ]
A*v = ...

Jan2713 05:33 AM
Simon Bridge

1 
594 
Let's say I have a vector (4+2i, 1i), how do I take an L2 norm?
Dont tell me I simply do sqrt(16+4+1+1)..?

Jan2713 12:21 AM
jbunniii

1 
900 
Greetings.
I am new to the forums. I will try and keep this short.
Linear Independence vs Linear Dependence....

Jan2613 02:03 PM
Gipson

38 
2,668 
Hi.
I'm trying to determine the CFL condition for the fourthorder leapfrog scheme. I'm finding 2 as what's...

Jan2613 01:15 PM
wrechtin

4 
1,414 
When the book says "Members of ] are linear combinations of linear combinations of members of S". basically means the...

Jan2613 10:56 AM
Fredrik

3 
777 
Hi, I'm learning about vector spaces and I would like to ask some questions about it.
Suppose I have a vector space...

Jan2513 04:57 PM
lavinia

5 
929 
Hello, :)
I would like to minimize and find the zeros of the function F(S,P)=trace(SSP’(A+ PSP’)^1PS) in respect...

Jan2513 06:04 AM
GoodSpirit

3 
802 
hey guys so i am well familiar with finding out rank of square matrices but if matrix is just a row or column vector...

Jan2413 01:21 PM
shivaniits

9 
963 
a = xyz
b = xy+xz+yz
c = x + y + z
How do you solve x, y, and z?

Jan2313 04:46 PM
mfb

3 
876 
In the book it states that the span of the empty set is the trivial set because a linear combination of no vectors is...

Jan2313 07:24 AM
HallsofIvy

3 
964 
The question is which sets of natural numbers are closed under addition. I know that odd is not, and I know how to...

Jan2313 03:23 AM
lurflurf

2 
837 
Hi all. I have a question about the properties of the generators of the SO(N) group.
What kind of commutation...

Jan2213 01:44 AM
Einj

3 
873 
From my textbook:
A free Rmodule is "A left Rmodule F is called a free left Rmodule if F is isomorphic to a...

Jan2113 02:51 AM
algebrat

1 
984 
Hi all,
I searched all other threads but was unable to find something useful. Here is my question: I am looking...

Jan2013 03:06 PM
Wrukproek

0 
618 
Prove the Generalized Associative Law for Groups (i.e. a finite sum of elements can be bracketed in any way).
The...

Jan2013 12:55 PM
Fredrik

6 
1,354 
A Theorem in our textbook says...
If R is a PID, then every finitely generated torision Rmodule M is a direct sum...

Jan1813 03:00 PM
mathwonk

1 
897 
Dear Friends & Colleagues,
I have a couple of nagging issues with mathematics I was hoping any one of you would...

Jan1813 10:42 AM
Stephen Tashi

5 
2,182 
Following is a list of 39 Mersenne numbers. Some are prime and some are not. These are generated with x =(...

Jan1713 08:06 AM
arydberg

6 
1,228 
hey guys
given Ax=B where A is a square matrix and x and B are vectors, can anyone tell me why a singular matrix...

Jan1613 08:38 PM
joshmccraney

3 
982 
I was thinking about the following proposition that I think should be true, but I can't pove:
Suppose that F is a...

Jan1613 05:59 AM
lavinia

2 
922 
Hi,
For any odd composite 'N', let u = (N1)/2, v = u+1, then u^2(mod p) = v^2(mod p) if and only if 'p' is a...

Jan1613 02:49 AM
dodo

1 
889 
My textbook says that...
If M is a left Rmodule, then a submodule N of M...is an additive subgoup N of M closed...

Jan1513 09:33 PM
mathwonk

3 
730 
I'm unable to understand this generalization of vectors from a quality having a magnitude and direction, to the more...

Jan1413 10:29 AM
danzibr

4 
1,278 
In this video:
http://www.youtube.com/watch?v=FZzQKBlpE
At the time 2:10, I don't understand why we have to...

Jan1413 07:15 AM
Artusartos

4 
1,009 
Perhaps forum members can advance science by solving this optimization problem from The Protein Engineer ...

Jan1313 04:10 PM
homeomorphic

2 
785 
I don't know if this is the correct section to post this, but does Galois theory has any applications in physics?

Jan1313 03:47 AM
Jim Kata

2 
1,770 
Pretty much what the title says.
Suppose we have a topological vector space $(X,\tau)$ and $U\subseteq X$ is...

Jan1213 09:32 AM
danzibr

5 
1,137 
Hi all,
I have been asked the question by a friend of mine who was working on a computer algorithm where he needed...

Jan1113 03:01 PM
HallsofIvy

4 
1,171 
Hello all,
I am new to this forum but am glad I found it, I have a quick question about condition numbers and order...

Jan1013 06:08 PM
AlephZero

5 
1,089 
Hello,
I was wondering if this problem is one that is solvable, and if so, if I would be able to solve it in a...

Jan913 11:31 PM
hello95

3 
1,013 
Hey guys, lurked here a bit, but now I'm in this new math course right. So anyway it seems like a completely new...

Jan913 06:59 PM
sniper_spike

4 
799 
Hi guys, first post!
I'm doing some side work on coupled oscillating systems, and I've almost found a procedure to...

Jan913 03:39 PM
Jack Jenkins

0 
826 