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

Feb2313 09:24 AM
micromass

1 
35,745 
This is from "Prime factorization of integral Cayley numbers" by H.P. Rehm
...

Jul1211 07:28 PM
UD1

0 
823 
Hi,
I already posted this in solid state physics forum, but no one answered, so I guess this topic might belong to...

Jul1211 01:37 PM
Lojzek

0 
668 
I have attatched my Paradox for the existence of 4,5 and 7 using Brocard's problem . I don't know where i have gone...

Jul1211 03:31 AM
atomthick

3 
2,552 
max ( Ax)/(x) , where x is not 0. A is a matrix.
It said that the stationary point are the right...

Jul1111 08:09 AM
wall_e

0 
777 
helloo
while working on a combinatorics problem I have found the following result:
let A=(a_{ij})_{1\leq...

Jul1011 07:54 AM
micromass

3 
1,629 
Hi everyone!!
I can't figure out why electromagnetism is defined a non integrable phase factor (or path dependent),...

Jul911 01:57 PM
lennyleonard

0 
954 
I've been enormously impressed with the core members of this forum, especially hurkyl. There was a guy who claimed to...

Jul811 07:13 PM
micromass

20 
5,163 
Here is a visual prime pattern:
http://plus.maths.org/content/catchingprimes
I have developed one of my own based...

Jul811 03:56 PM
JeremyEbert

112 
26,341 
Where did the binomial theorem come from.....???

Jul811 12:28 AM
quantizedzeus

6 
1,997 
I'm working my way through Shaum's Outline on linear algebra and in it they define a complex number as an ordered pair...

Jul711 02:58 PM
HallsofIvy

3 
1,588 
Hi,
While trying to solve an optimization problem for a MIMO linear precoder, I have encountered the need to...

Jul711 12:40 PM
lanedance

1 
1,935 
Hello,
I am unable to grasp the significance of adjoint operators both in linear vector space as well as function...

Jul711 08:11 AM
micromass

8 
2,939 
I got this question from another
forum and it's driving me crazy.
Find all triples of odd primes,
p,q,r such that
...

Jul611 10:26 PM
agentredlum

2 
2,440 
Hi all,
I've developed a new sieving method that I believe provides a tight lower bound for the counting of certain...

Jul611 07:19 PM
SteveL27

3 
3,297 
Does anyone know the answer to this problem: if you have a set of consecutive prime numbers (2,3,5,7...), what is the...

Jul611 07:18 PM
kid1

5 
3,213 
I would like to have a function f such that f(0) = 0 and f(x) = 1 for any x>0. I can compute f in the following way: ...

Jul611 07:33 AM
gb7nash

6 
2,602 
Let a General Continued Fraction (gCF) be given as
(1) ...

Jul511 05:50 AM
RamaWolf

0 
1,630 
Ok, I am completely taken over by bases, they're too fun. Recently i was working with base phi (1.61803..) and some...

Jul411 10:05 AM
SubZir0

0 
1,859 
So say you have a presentation matrix A for a module, and you diagonalise it and you get something like diag well you...

Jul411 09:51 AM
micromass

1 
1,719 
Let N be an integral nonsquare number, we have Pell's equation by
(1) x^{2}N*y^{2} = 1
associated with the...

Jul411 04:45 AM
RamaWolf

0 
1,567 
http://vixra.org/abs/1007.0005
using the semiclassical theory of quantum `physics i manage to give a Hamiltonian...

Jul311 07:20 AM
zetafunction

0 
1,720 
I have a small problem where I remember I learned it in the past. But now I can't seem to recall how to do it. I...

Jul111 09:13 PM
Yondaime5685

7 
1,497 
Does anyone know where can i find the proof that the Selberg Zeta function has ALL its zeros on the critical line ??
...

Jul111 06:15 AM
zetafunction

0 
1,692 
Let me explain further my question by what i mean 'operation'. An 'operation' can be on a single number, example...

Jun3011 04:51 PM
agentredlum

34 
6,348 
in some work i'm doing i have a 2D rectangle that can be rotated and/or translated in any direction in 2D space. for...

Jun2911 11:39 AM
xovangam

11 
3,201 
Hi, the following linear algebra question is causing trouble for me:
For which values of k does the following...

Jun2811 08:11 PM
jberg074

6 
4,575 
I've already post this, but i've done it in the wrong section!!
So here I go again..
I've a doubt on the way the...

Jun2811 08:44 AM
teddd

12 
3,830 
I am trying to solve a problem with spacetime metrics and a change of coordinates for my research project.
I have...

Jun2711 07:12 PM
HallsofIvy

1 
960 
Hi, we know that for all interger m, n_1!\cdots n_k! divides m! where n_1+\cdots+n_k=m.
Now I want to show that m!...

Jun2711 03:06 PM
micromass

5 
2,175 
In this field, computer algorithms may produce false continued fraction expansions because of
the limited accuracy...

Jun2711 02:56 PM
KevB

6 
3,669 
So a number of mathematicans showed that an odd perfect number is not divisble by either 3, 5,or 7. I tried really...

Jun2711 11:26 AM
mathwonk

3 
2,775 
Is it true that any linear map between two arbitrary finitedimensional vector spaces is continuous? Is it...

Jun2611 09:57 PM
mathwonk

4 
2,650 
Hi all,
I'm trying to find the integer solutions for
6n^2 18n +16 = m^2
using pell equation, any idea
...

Jun2611 03:28 PM
epsi00

10 
2,233 
A lattice is a partially ordered set such that every finite set has a least upper bound and a greatest lower bound....

Jun2611 09:26 AM
Fredrik

3 
1,210 
I'm curious why people develop these objects. Although I've seen some proofs of theorems using coset(or quotient space...

Jun2611 01:04 AM
kof9595995

6 
2,047 
According to duality principle, a bilinear function \theta:V\times V \rightarrow R is equivalent to a linear mapping...

Jun2511 07:42 AM
micromass

3 
1,759 
Hey there
I would just like some help in rearranging the formula:
z=\frac{1+\frac{v\cos...

Jun2411 02:52 PM
Pretty Pony

2 
1,486 
I wanted to make clear just a quick technical thing. If G is a group, N is a normal subgroup, and \phi_g \in...

Jun2411 01:30 PM
Kreizhn

2 
1,432 
The matrix giving the relation between spherical (unit) vectors and cartesian (unit) vectors can be expressed as:
...

Jun2411 05:29 AM
nceba

4 
1,504 
http://www.math.northwestern.edu/~clark/285/200607/handouts/linconstraint.pdf
It's actually proof of finding...

Jun2311 09:37 PM
holemole

1 
1,695 