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

Feb2313 09:24 AM
micromass

1 
30,412 
When explicitly given a set of polynomial equations, I am interested in describing its singular locus.
I read this...

Feb1812 01:23 AM
Norwegian

1 
1,094 
What is the standard for counting with composite numbers?
If I can count to infinity with all odd composites and...

Feb1312 09:35 AM
lostcauses10x

33 
3,870 
Hello,
Background:
We have a machine with two rotational axes (b,c) attached to each other. By design the B axis is...

Feb1312 02:37 AM
Johan_L

7 
4,258 
If we assume that the Twin Prime Conjecture is true (and thus there are infinite number of primes that are 2 apart),...

Feb812 08:42 PM
ramsey2879

6 
2,078 
hallo
I am trying to calculate the probability to obtain 2 sets of linearly independent vectors from a set of...

Feb1412 08:41 AM
SvS

5 
1,654 
I am trying to find nonzero prime ideals of \mathbb{Z} \oplus \mathbb {Z}, specifically those which are not also...

Feb1212 01:03 AM
morphism

6 
2,351 
I know how I would be able to do this using projection, but am not so sure with dot products.
Do I dot the normal...

Feb1312 06:21 PM
haackeDc

3 
3,411 
Hi,
My question is to show that the linear transformation T: M2x2(F) > P2(F) defined by
T (a b c d) = (ad) ...

Feb912 03:11 PM
conquest

3 
2,167 
I'm confused with a question and wondered if anyone could help explain where I need to go...
let x ε R. Prove that...

Feb912 10:36 AM
Deveno

5 
1,464 
Well I generally haven an idea about subgroup of a group and generators. But I fail to understand following:...

Feb1012 12:59 AM
foreverdream

11 
1,626 
I want to prove that the square of any integer is in the form of 4n or 4n + 1.
I know that when we square any...

Feb1012 04:29 PM
mathman

8 
2,123 
I don't understand how to show that the reflections and rotations are associative. Thanks for any help.

Feb912 02:08 AM
ry22

2 
1,803 
Ramsey Primes are those generated from a simple criteria that is easy to check. I checked all odd numbers from 1 to 1...

Feb1612 12:55 PM
dodo

8 
2,147 
I'm trying to prove that every nxn matrix can be written as a linear combination of matrices in GL(n,F).
I know all...

Feb912 02:59 PM
conquest

1 
1,540 
greetings . i have a couple of questions about the prime counting function .
when \pi _{0}(x) changes by 1, then...

Feb912 11:51 AM
riemannian

1 
1,478 
(x^k)  1 = (x  1)*(x^(k1) + x^(k2) + ... + x + 1)
Where does this factorization come from? I need to know so I...

Feb1112 05:26 AM
Fredrik

9 
2,465 
we have an Ipad mounted on a vehicle and would like to know that if the ipad is mounted in a tilted manner, would the...

Feb1012 02:30 AM
chiro

1 
1,149 
In order to improve my knowledge of Linear Algebra I am reading Linear Algebra Done Right by Sheldon Axler.
In...

Feb1212 08:38 PM
Deveno

7 
1,643 
Let G be a finite Group. If every proper normal subgroup of G/Z(G) is supersolvable then every proper normal subgroup...

Feb1012 12:26 PM
moont14263

0 
1,086 
Direct product of two irreducible representations of a finite group can be decomposed into a direct sum of irreducible...

Feb1512 09:09 AM
morphism

5 
1,851 
Nonrepeating patterns in decimal expansions of irrational numbers seem to have two forms. I am wondering if there is...

Feb1312 10:07 AM
oli4

7 
3,081 
I was wondering if this is a correct statement, I'm assuming it is for my proof.
Let e,f and g be non zero...

Feb1212 02:14 PM
tinytim

1 
1,424 
I'm researching a problem relatived to group SO(8). I have searched many book of theory Group but I did'n find SO(8)...

Feb1312 02:03 AM
tom.stoer

5 
1,253 
Hello Mathematician
Can the matrix be differentiated with respect to a vector?
Regards
Aman

Feb1512 12:46 PM
Bacle2

3 
1,466 
Why would you want to use a matrix for a linear transformation?
Why not just use the given transformation instead of...

Feb1812 11:06 AM
matqkks

4 
1,592 
Hi guys
I have a question about the coprime of two vectors
For two vectors (x1,x2) and (y1,y2).
Given a,b with...

Feb1312 09:20 PM
Norwegian

5 
1,522 
I was studying (yet another) number theory problem, described here:
Prove that the equation x^3+y^3+z^3+t^3=1999...

Feb1712 02:58 PM
AntiCrackpot

24 
3,423 
The group in question is U100, the group of units modulo 100, which, correct me if I'm wrong, is equal to {3, 7, 9,...

Feb1312 12:40 PM
Norwegian

1 
2,018 
(1)Assume a, b and n are nonzero integers. Prove that n is divisible by ab if and
only if n is divisible by a and n...

Feb1512 02:47 PM
Deveno

3 
1,846 
someome please help me with this problem:
"Any real numbers x and y with 0 < x < y, there exist positive integers p...

Feb1312 10:32 PM
micromass

1 
1,489 
Will the set of eigenvalues of an incident matrix derive an equivalent notion of a graph spectrum as it does with an...

Feb1612 08:19 PM
spikedmath

1 
910 
If you could assume that every even number > 6 is the sum of at most 4 primes, would that help in anyway to prove it...

Feb1512 12:53 PM
kulix

0 
1,379 
removed

Feb1512 05:37 PM
lostcauses10x

3 
1,524 
I'm learning about rings, fields, vector spaces and so forth.
The book I have states:
"Realvalued functions on...

Feb1612 03:54 PM
arkajad

10 
1,799 
If you consider the permutation representation of Sn in ℂ^n, i.e the transformation which takes a permutation into the...

Feb1512 06:29 PM
morphism

2 
1,147 
Hi everyone,
I keep seeing in textbooks and examples online that when someone proves that a set is a vector space,...

Feb1612 01:09 AM
Bacle2

2 
791 
Let’s say that we have a constant matrix A which is the coefficients matrix and column vector U of control variable as...

Feb1912 06:16 AM
mhdella

4 
1,310 
Hi there,
I'm doing homework right now (no this isn't a homework question!) and have basic questions on...

Feb1612 01:03 PM
Deveno

3 
1,596 
I'm trying to prove eA eB = eA + B using the power series expansion eXt = \sum_{n=0}^{\infty}Xntn/n!
and so
eA eB...

Feb1812 04:38 PM
kai_sikorski

5 
2,671 
Hello, i am studying vector subspacess and Axler introduces the two criteria for a vector subspace (closure under...

Feb1912 09:38 AM
lavinia

2 
1,501 