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

Feb2313 09:24 AM
micromass

1 
35,748 
How do I find out if a number is a perfect square modulo a? For example, is 4 (mod 10) a perfect square?

Jan205 07:21 PM
daster

9 
10,777 
in mathworld, they say that conway proved "that Collatztype problems can be formally undecidable."
does it mean that...

Jan405 11:07 AM
master_coda

14 
3,538 
Hi all, I don't know how to solve this:
The vector u has the coordinates ( u_1, u_2, u_3 ) to the base a = { (...

Jan505 04:31 PM
mathwonk

2 
1,767 
I am deleting

Jan605 06:18 AM
matt grime

22 
6,093 
I had a question regarding subspaces.
Given vectors (a,b,c,d) s.t....

Jan605 09:35 PM
Hurkyl

9 
1,710 
How do u show that a matrix is diagonizable ?
Thanks

Jan805 11:11 PM
mathwonk

3 
2,867 
Find the solution in C to the following linear system of equations.
(a) (1i)z + 4w = 2 + 8i
(b) 3z + (1+i)w = 1...

Jan1005 02:43 PM
3.14159265358979

3 
1,596 
I have some questions concerning the rationnal numbers and the vector spaces.
Let's take the set of rational number Q...

Jan1105 07:34 AM
seratend

39 
4,706 
Hi all,
when is a oneelement set is linearly independent? Just when it's nonzero?
I am not sure how to prove this...

Jan1405 03:18 PM
EvLer

4 
1,375 
Hi,
What's the relationship between the image and kernel of T and the image and kernel of Tn? I think we saw in...

Jan1405 09:52 PM
AKG

3 
2,772 
Hi all,
I wanted to study Lie groups and their connections with differential geometry. But i dont want to get...

Jan1405 11:39 PM
mathwonk

2 
2,048 
I have a homework problem here I am a little at a loss on due to not very good examples in class and the part of the...

Jan1605 02:59 PM
DaVinci

6 
21,898 
I guess i didn't get the last one completely because i've been having a hard time with this one. Solve
3x + iy +...

Jan1705 03:03 AM
3.14159265358979

8 
5,656 
Okay, I've had this question lingering on my mind for a LONG time, so I'm finally going to ask. I took a semester of...

Jan1705 04:43 PM
JasonRox

20 
3,619 
I have this materials mathematical problem(its not homework) and I figured people here are good at...

Jan2005 12:01 PM
K.J.Healey

0 
3,808 
I tried to solve this Gaussian elimination algorithm problem (matrices) but for some reason when I plug in the x...

Jan2405 11:52 PM
cronxeh

1 
3,085 
prove that there are infinetely many primes of the form
3n+1
we used :
Assume there is a finitely # of primes...

Jan2505 11:10 AM
shmoe

4 
3,534 
Hi everybody,
I have a small question. I know that we have defined multiplication of a number and a vector ,for...

Jan2605 08:47 AM
C0nfused

3 
4,803 
Hi everyone,
general question: is a solution set for a particular system a vector space? I know it can be if there is...

Jan2605 06:51 PM
HallsofIvy

2 
1,051 
I was recently writing a program that needed to encode a permutation
into a single integer number (an index, from 0...

Jan2705 10:22 AM
dodo

4 
2,041 
I'm working on a skeletal animation system, and I want to interpolate the rotations between frames. The rotations are...

Jan2705 04:42 PM
BobG

2 
7,394 
I just want to confirm these two questions. Thanks in advance.
(1) Describe all solutions of Ax = 0 in parametric...

Jan2905 10:46 AM
HallsofIvy

2 
4,717 
Hi, I'm a high school senior in my first semester of Calculus, so my math is pretty limited at the moment. I was...

Jan3005 04:07 AM
Muzza

12 
3,573 
Hello,
I have a hw problem I need some help with.
Given 3 matrices:
A = ^t
B = ^t
C = ^t
I need to use test of...

Jan3105 08:36 AM
EvLer

4 
1,357 
hai,
what is hilbert space ?any important links known to you regarding that?please send some links .

Jan3105 09:47 PM
mathwonk

5 
2,436 
Hi,
Does different eigenvector algorithm give different result?
eg. using QL with implicit shifts frm (Numerical...

Feb105 09:48 PM
mathwonk

3 
1,224 
I need to show that this is an algebraic number.
In other words,
I need to show: an*x^n + an1*x^(n1) + ... + a1...

Feb205 12:51 AM
robert Ihnot

1 
1,227 
In case I have a transportation model (tabular form) with a dummy source... so each cell has a cost of $0. If I were...

Feb205 02:24 AM
irony of truth

0 
2,514 
What is a basis for the vector space V which consists of all sequences
g(n) = a_n
in F that have only a finite...

Feb305 11:33 AM
mathwonk

2 
1,667 
First the easy one (I think):
Show that x422x3+1 is irreducable (is that how it's spelled?) over Q.
Now the...

Feb305 11:30 PM
mathwonk

19 
2,979 
Im a second semester engineering student and im a few weeks into a linear algebra class. I understand most of it, but...

Feb405 10:49 AM
mathwonk

5 
1,102 
This is rather silly...
Imagine you paid $10 for a $5 calculator. Then you paid twice the real amount.
Imagine you...

Feb405 05:07 PM
DoubleMike

15 
1,495 
I'm having a problem with a proof I came across in one of my calculus books but it's not the calculus part of the...

Feb505 12:56 AM
mathwonk

3 
1,877 
Question from a mathematics dunce.
I recently read that Merseinne primes are searched for using 2^x 1 where x is...

Feb605 12:00 AM
robert Ihnot

8 
1,844 
Q. Consider the case with V being the kth order polynomials with real coefficients. Let the derivative mapping D be...

Feb605 11:53 PM
eckiller

2 
1,259 
In my hw problem, I am supposed to find out whether an element belongs to the rowspace of a matrix. So, what I did is...

Feb705 03:20 AM
Galileo

3 
1,965 
.............

Feb705 08:09 PM
andytran

0 
1,337 
who can prove that if we have x=((3^n)*m1)/(2^k) where x and m are odd
then x will be: x=(2^(n1))*m11 where m1 is...

Feb805 01:13 PM
TenaliRaman

1 
1,587 
hi!
would like to know what a homeomorphism means ( how do you geometrically visualize it?)
AND is the symbol 8...

Feb805 03:23 PM
mathwonk

10 
3,081 
Hi please help me out!
1a) Determine whether this subset of C(R) is linearly independent or not; the dimension of...

Feb805 07:32 PM
mathwonk

10 
1,180 