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

Feb2313 09:24 AM
micromass

1 
33,963 
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 
1,199 
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 
2,033 
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 
1,718 
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 
1,460 
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 
1,408 
The matrix giving the relation between spherical (unit) vectors and cartesian (unit) vectors can be expressed as:
...

Jun2411 05:29 AM
nceba

4 
1,479 
http://www.math.northwestern.edu/~clark/285/200607/handouts/linconstraint.pdf
It's actually proof of finding...

Jun2311 09:37 PM
holemole

1 
1,675 
I know that the nth Fibonacci number is defined as:
\frac{{1+\sqrt{5}}^{n}{1\sqrt{5}}^{n}}{{2}^{n}\sqrt{5}}
...

Jun2311 07:35 PM
dimension10

4 
6,530 
In some exercises I've stumbled upon a function which is denoted \gamma_{m}(n) with m,n natural. I've no idea what is...

Jun2311 04:36 PM
Hurkyl

3 
1,686 
I don't understand how order 1 alternating tensors fit the definition of alternating tensors. I think the order has to...

Jun2311 04:20 PM
mathwonk

2 
1,368 
Limiting ourselves to N...
Conjecture:
(sqrt (16x + 9)  1)/2 = y  2y^2 + 2y  3 = z^2
for x = a Sophie...

Jun2311 02:23 PM
ramsey2879

25 
7,743 
Reading about the general rotation of a single qubit, a rotation of \theta in the horizontal plane and \phi) in the...

Jun2311 01:06 AM
nomadreid

0 
1,911 
I need to understand physics (and other) concepts but I'm having trouble visualizing what the equations mean.
One...

Jun2211 10:13 PM
jimgavagan

3 
2,121 
I am doing my Extended essay about the maths involved in calculating your position using the GPS. I am reading a very...

Jun2211 03:36 PM
jbunniii

4 
4,661 
So Sylow's second theorem tells us that if G is a group, p a prime, and H,K are both pSylow subgroups, then \exists...

Jun2211 11:36 AM
Kreizhn

2 
1,314 
Hello all,
I'm a freshman undergraduate (UCLA) and have finished my study lower division calculus (multivar, diff...

Jun2211 01:07 AM
Bill Simpson

9 
3,220 
I have two questions and I hope it is acceptable...Seemingly unrelated, though I came to wonder about the first while...

Jun2111 02:42 PM
micromass

3 
1,926 
I have noticed something strange when you take the value of sin(pi*10^n). It approaches pi*10^n. I have attatched...

Jun2111 10:53 AM
micromass

3 
2,448 
Let q be an odd prime power. Let n be the multiplicative order of q modulo t, where t is even and t > 4. What are the...

Jun2111 09:24 AM
burritoloco

0 
1,341 
Why is the Trace of a projection is its Rank.
Thank you

Jun2111 03:21 AM
micromass

3 
2,967 
Let q be an odd prime power. Let n be the multiplicative order of q modulo t, where t is even and t > 4. What are the...

Jun2111 02:29 AM
burritoloco

0 
1,233 
I was hoping you guys could help me in understanding some vector spaces of infinite dimension. My professor briefloy...

Jun2111 12:11 AM
mscudder3

7 
4,188 
Is it true that every matrix is similar to its transpose? A claim in Wikipedia...
(field is alg. closed)

Jun2011 10:27 PM
arthurhenry

4 
1,808 
Hi, All:
Could someone please tell me or give me a ref. on the basic properties of
Gl(n,R) ; R a ring;...

Jun2011 08:34 PM
Bacle

2 
1,487 
My understanding of Lie groups is nonexistent.
But I'm trying to understand if the Leech lattice is a 'lie group?"

Jun2011 02:55 PM
Aztral

4 
1,548 
A nonzero alternating tensor w splits the bases of V into two disjoint groups, those with \omega(v_1,\cdots,v_n)>0...

Jun2011 02:18 PM
micromass

1 
1,218 
Other than the Eucledean method
(1+p1p2p3...)and so on
other than this, how do we prove that there are infinte...

Jun2011 11:46 AM
disregardthat

10 
2,968 
Sorry if this is a well known thing, but I've noticed this and decided to see how well known it is, also if there is a...

Jun1911 10:14 PM
Antiphon

2 
2,646 
I just read an article (http://www.maa.org/devlin/devlin_06_08.html) saying that multiplication is not repeated...

Jun1911 06:22 PM
agentredlum

93 
15,792 
Title says it all really. But basically I'm looking for online info about creating the Leech lattice from the E8...

Jun1911 03:03 PM
Aztral

0 
842 
Hi all,
I have been trying to gain a deeper insight into quadratic forms and have realised that my textbook makes...

Jun1911 12:43 PM
lpetrich

14 
2,677 
Hello,
I am trying to solve a Pell's equation
X2 + 2Y2 =1
I understand that the (3,2) is a fundamental...

Jun1911 10:47 AM
RamaWolf

6 
2,517 
Okay, I know that if I can't get n linearly independent eigenvectors out of a matrix A (∈ℝnxn), it is not...

Jun1911 06:06 AM
td21

3 
1,918 
I'm wondering why 1/k! is needed in Alt(T), which is defined as:
\frac{1}{k!}\sum_{\sigma \in S_k} \mbox{sgn}\sigma...

Jun1811 10:13 PM
mathwonk

2 
1,187 
Outside of pure mathematics, where is group theory used?

Jun1811 09:54 PM
mathwonk

6 
2,384 
i have ordered introduction to linear algebra by gilbert strang.But i saw it on google books and found it to be...

Jun1811 09:53 PM
mathwonk

2 
2,950 
Hi, Algebraists:
Say I'm given a group's presentation G=<XR>, with
X a finite set of generators, R the set of...

Jun1811 07:13 PM
Bacle

2 
1,100 
i want to extend the set S={(1,1,0,0),(1,0,1,0)} to be a basis for R4. I know I am going to need 4 vectors, so i need...

Jun1811 04:07 PM
Bacle

6 
6,520 
Hi all,
I have problem with regard to illconditioned linear system of solving sets of simultaneous equations using...

Jun1811 02:29 PM
kaizen.moto

0 
1,399 
such as some 3D matrix visualization or eigenvalue/singular value things/jordan form?
Thanks very much for any...

Jun1811 10:01 AM
Stephen Tashi

1 
1,659 