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

Feb2313 09:24 AM
micromass

1 
36,186 
Could you provide a link to a 'number system with an irrational base'?
I only found this link...

Mar1712 03:35 PM
BenVitale

6 
5,291 
Hi,
I need to write a code to convert a symmetic matrix into tridiagonal form and am planning to use the...

Mar2412 12:41 PM
Hassan2

13 
3,019 
In the Preliminaries to Grove and Benson "Finite Reflection Groups' On page 1 (see attachment) we find the following:...

Mar1612 09:47 PM
Math Amateur

4 
1,587 
Sorry for thumb terminology, I just would like to grasp the main idea, as a physicist, without unnecessary...

Mar1712 08:25 PM
mclaudt

3 
1,923 
Do there exist numbers which are not ultimately functions of the integers?
Would they necessarily be transcendental...

Mar1812 01:17 AM
SteveL27

12 
2,474 
Let n=79
phi is Euler totient
Can you find a number k such as :
phi(k)=0 mod 79
phi(k+1)=0 mod 79...

Mar1712 08:15 PM
Gaussianheart

2 
2,025 
Here is an algorithm very simple to find a common factor to a and b.
An example :
a=867
b=1989
1. We compute...

Mar1812 07:38 PM
Gaussianheart

20 
3,031 
I have these questions on my studyguide and I know both of them are false. I just don't have a good counterexample or...

Mar1712 04:38 PM
Alesak

5 
1,343 
if {x1 , x2 , .....xi} and {y1,y2,.....yi} are finite sets.
are two sets of real numbers. Then sum
Ʃ xixj...

Mar1612 11:55 AM
sparsh12

2 
1,640 
Hi all,
I am trying to find the probability that a matrix has full rank.
Consider a K*N matrix where the first...

Mar1612 12:30 AM
anu914

0 
1,069 
Hi:
I`m new here, can someone tell me which is the difference between the transition matrix and the Jacobian?, I...

Mar1712 02:59 PM
lavinia

3 
1,508 
Hey,
i've been trying to find a better fit for a correlation, the numbers i'm dealing with are really small and when...

Mar2112 11:27 AM
Stephen Tashi

1 
1,909 
I am reading Dummit and Foote on Representation Theory CH 18
I am struggling with the following text on page 843 ...

Mar1612 08:46 AM
lavinia

8 
1,764 
If F is a field of characteristic p, with prime subfield K = GF(p) and u in F is a root of f(x) (over K), then u^p is...

Mar1712 12:34 PM
Hurkyl

3 
1,208 
I change the question completely. If i get an answer for this, my question would be resolved.
Everyone is obsessive...

Mar1612 03:17 PM
Robert1986

2 
1,624 
Hello Everyone :)
I have been facing a little difficulty when encountering such kind of problems . i have also...

Mar1912 07:56 PM
ajkoer

8 
1,224 
Hey,
I have a small question about groups,
If you have a comunitative 'group' H = <a in H : a2=1>,
Is that...

Mar1812 04:16 AM
Alesak

4 
960 
How do I show that for any vectors u,v, and w in a vector space V, the set of the vectors {uv, vw, wu} is a...

Mar1912 11:39 AM
HallsofIvy

6 
2,991 
I need to prove that a be a odd integer that congruence X^2\equiva mod 2
is always solvable with exactly one...

Mar1712 11:13 PM
Office_Shredder

1 
1,632 
Q. Given that A is invertible , check whether A + A^(1) is invertible or not ?
A. A is invertible . => A^1 exists...

Mar2112 08:03 AM
vish_maths

13 
1,728 
Hi,
I m refering 'Linear Algebra and its applications by Gilbert Starng".
I read (ch.3.1)"Matrix transforms every...

Mar1812 02:04 PM
kthurst

0 
916 
Hello
I have this Hamiltonian:
\mathcal{H} = \alpha S_{+} + \alpha^{*}S_{} + \beta S_{z}
with \alpha,...

Mar1912 09:08 AM
Joschua_S

0 
1,259 
Hi i found a question in number theory, involving two equations, it goes as follows:
Let p1, p2, p3 and p4 be 4...

Mar1912 06:11 PM
Norwegian

1 
2,285 
I think I found a procedure (other than the extended Euclidean algorithm) to compute the multiplicative inverse of a...

Mar2012 05:20 AM
dodo

0 
1,403 
Hi everyone, I always have trouble on decomposing number into irreducible factors inside Gaussian integer field. I...

Mar2112 05:50 AM
Norwegian

3 
1,092 
This is dealing with computer vision, but the only part I'm having trouble understanding is a step in the matrix math....

Mar2312 01:33 AM
Stephen Tashi

6 
1,480 
I got one example on my notes about PID and maximal ideal. I feel it is a strange example as it doesn't make sense to...

Mar2112 10:12 AM
mathwonk

2 
1,399 
Firstly, I am not sure if I am in the right section. Pardon me.
I was reading something related to computational...

Mar2212 07:57 AM
rukawakaede

9 
3,065 
We learned the GSP yesterday in class, but my teacher said something that seems to conflict with the textbook.
He...

Mar2112 10:06 AM
mathwonk

1 
907 
I have some questions about spanning sets
1. Why does empty set spans the zero subspace?
2. Why is this true:...

Mar2112 10:41 AM
mathwonk

5 
976 
Hi, I know next to nothing about abstract algebra (had one introclass years ago), so sorry if this is a dumb...

Mar2212 03:10 PM
mathwonk

5 
1,304 
I am readin Belinte's book about Lie algebras (I have also the Cahn) .
And I try to understand this. He writes
...

Mar2312 11:38 AM
naima

2 
874 
Some algorithms of finding the eigenvalues of symmetric matrices first transform the matrix to a tridiagonal matrix...

Mar2212 08:07 PM
Hassan2

2 
1,559 
Hi, I am told to give the subgroup H=<α,β> with α,β\inS3
α = (1 2)
β = (2 3)
So I know that H={αkβjj,k\in(the...

Mar2212 10:44 PM
HallsofIvy

1 
1,709 
Say i have the following function:
f(x)= {45 , x<0.5
45 , x≥0.5}
where x\in R is a real variable in ....

Mar2312 12:20 AM
chuy52506

3 
1,969 
When we talk about an abstract binary operation *:SxS > S
We say that an identity element "e" exists when e * x =...

Mar2312 11:42 AM
dijkarte

2 
974 
I did these years ago. I remember that there used to be an order, that if you followed, you always got the answer. ...

Mar2312 01:26 PM
tony873004

0 
811 
Is it true that SO(3) has no complex 2dimensional representation (except the trivial one...)? How to see this? If it...

Mar2412 06:40 PM
quasar987

2 
1,151 
Let a, b, and c be elements of group <G, *>, then
Can we apply cancellation law here:
a*b = c*a???
I could prove...

Mar2412 11:22 PM
dijkarte

8 
1,631 
Hello,
it's been a while since i did linear algebra. i need some help. I have this matrix:
1 1 0
0 1 0
0 0...

Mar2512 08:34 PM
HallsofIvy

1 
1,583 