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

Feb2313 09:24 AM
micromass

1 
35,761 
Hi,
Can anyone recommend a freely available library in C or C++ that is able to calculate eigenvalues and...

Dec2709 06:54 PM
patiobarbecue

3 
11,172 
What is the infinite product for the function
\Xi(s)=\Gamma\left(\frac{s}{2}\right)\pi^{s/2}\zeta(s)
?

Feb1710 07:52 PM
Charles49

3 
3,416 
Hi!
I have following question. I will explain it with abstract notation although in fact I am working with some...

Dec2909 04:25 AM
kakaz

3 
1,712 
I'm having trouble grasping what an irreducible representation is. Can someone explain what this is through an example...

Jan110 09:04 PM
meopemuk

3 
1,445 
3\times2^{m}+1=n^{2}
For some positive integers m and n.

Jan510 12:13 PM
robert2734

3 
1,241 
i'm working through the following text and I think I found an error please let me know if i'm totally wrong.
...

Jan1610 05:44 AM
Spartan Math

3 
2,531 
Hi
I'd like to show that SU(n) is a normal subgroup of U(n).
Here are my thoughts:
1)The kernel of of...

Jan1110 07:47 AM
wofsy

3 
1,888 
Ok so I am not a math major and i haven't taken an abstract algebra class but i am curoius about the subject. I have...

Jan1310 01:32 PM
wofsy

3 
1,053 
Hi,
I try to get a grasp on semidirect products, by notes written by Patrick J. Morandi ("Semi direct products")....

Jan1810 07:17 AM
haushofer

3 
1,025 
Is the following correct, as far as it goes?
Suppose I have a vector space V and I'm making a transformation from...

Jan1710 10:26 AM
Landau

3 
4,263 
Hello dear forum members I wanted to know where are the research on the Riemann hypothesis , the latest advances ,who...

Jan2010 07:58 AM
CRGreathouse

3 
2,038 
Hello everyone, I have been trying to teach myself number theory and I am stuck trying to prove a (I am sure) very...

Jan1710 03:05 PM
dodo

3 
1,888 
I know it's a dumb question but I can't figure out why the totient of n is always even (I've read in a book that it...

Jan1810 02:04 PM
crypto_rsa

3 
4,781 
Here is an interesting problem that I've been thinking about for a while:
Let p be a prime s.t. p = 4m+1 for some...

Feb110 10:12 AM
joeblow

3 
4,077 
okay so i was reading a book on representations and found this discussion and was confused:...

Jan2210 08:29 AM
wofsy

3 
4,916 
Hello.
I have been reading a book with an introductory section on number theory and the part regarding Euler's...

Jan2210 12:22 PM
dodo

3 
2,512 
From this example
AntiAliasing section 22.4.1
http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter22.html...

Jan2610 10:56 AM
rebeka

3 
1,799 
Hi Folks,
I have a question about determinants that is probably quite simple. I know that if you have a matrix and...

Jan2710 09:32 AM
ulriksvensson

3 
978 
I wonder if all coupling set of equations are not solvable analytically? I have a equation set as follows
y1 =...

Jan2710 12:07 PM
BCon

3 
1,278 
Hello dear forum member I wanted to know how about the research on this branch of science.Are many people working on...

Jan3110 06:06 AM
zetafunction

3 
2,195 
Hi,
I have just started teaching linear algebra to myself. I know nothing about linear algebra so if this question...

Feb310 06:50 PM
Zaphos

3 
3,005 
Hey everyone,
I'm taking this course called "Number Theory" and am having a lot of difficulty with it. We're...

Feb210 10:38 PM
ramsey2879

3 
1,674 
Hi,
I am new with linear algebra, and I'm having a hard time wrapping my mind around the 0 vector and the additive...

Feb210 07:40 AM
radou

3 
1,885 
I recently teach myself linear algebra with Friedberg's textbook.
And I have a question about adjoint operator, which...

Feb410 06:04 AM
typhoonss821

3 
1,163 
hi.
i'm reading "quantum mechanics in hilbert space" and a don't get a basic point for bounded operators.
def. 1...

Feb1010 07:25 AM
tommy01

3 
948 
Clearly I am missing something obvious here, but how is it that negative even numbers are zeros of the Riemann zeta...

Feb1010 12:10 PM
mrbohn1

3 
4,549 
G group, H subgroup of G.
Suppose aH and bH are distinct leftcosets then Ha and Hb must be distinct right cosets?
...

Feb1610 08:25 PM
Fredrik

3 
2,802 
"Let m and k be positive integers and φ(m) is the Euler's phi function. Then the number of integers n such that 1≤n≤mk...

Feb2110 04:31 PM
CRGreathouse

3 
1,645 
I'm a physics major. As such, I have come across several situations in my studies that require the use of eigenvectors...

Feb2210 09:04 AM
imaloonru

3 
1,806 
4=2+2, 6=3+3. Are there any other cases where an even number of the form 2p, where p is a prime, cannot be...

Feb2210 05:20 PM
CRGreathouse

3 
1,856 
I am having trouble understanding this example:
Let G=S_3 and H={(1),(13)}. Then the left cosets of H in G are
...

Feb2510 02:32 AM
mrbohn1

3 
1,046 
Show that (p1)(p2)...(pr)==(1)^r*r!(mod p) for r=1, 2, ..., p1. I am having trouble getting this proof started....

Feb2410 03:38 PM
Tinyboss

3 
1,904 
1) Definition: Let m denote a positive integer and a any integer such that gcd(a,m)=1. Let h be the smallest positive...

Mar110 09:49 PM
VeeEight

3 
1,956 
Hello there,
I have trouble understanding why the coefficients in an affine combination should add up to 1; From...

Mar910 04:17 AM
mrbohn1

3 
2,562 
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 
1,295 
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 
1,071 
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 
1,201 
Can anyone explain, in detail, why/why not Z/(2x) is isomorphic to Z/2Z? I know that every element in Z can be written...

Mar3010 09:01 AM
eok20

3 
2,701 
I have seen that there exists two group homomorphisms from Z to Z/2Z. However, I cannot seem to understand this. I...

Mar3110 05:20 PM
Landau

3 
1,794 
How can we find the determinant of a complex matrix?

Apr110 07:11 AM
HallsofIvy

3 
5,888 