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

Feb2313 09:24 AM
micromass

1 
30,487 
hey guys been staring at this question for a few days and frustratingly nothing springs to mind. If any1 could offer...

Mar1112 08:00 PM
20Tauri

3 
1,974 
Hello Mathematician
Can the matrix be differentiated with respect to a vector?
Regards
Aman

Feb1512 12:46 PM
Bacle2

3 
1,468 
(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 
1,852 
removed

Feb1512 05:37 PM
lostcauses10x

3 
1,531 
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 
1,604 
So this is the problem as written and I'm totally lost. Any help or explanation would be greatly appreciated.
...

Feb1912 07:51 PM
morphism

3 
1,503 
Hi, I need help to prove this for my professor
this is called "Distribution of power congruence classes" or something...

Feb2312 01:43 AM
Norwegian

3 
1,491 
Hello everyone,
I need some help with the following: I understand that by using xn = axn1+b we can generate a full...

Feb2212 09:59 AM
HallsofIvy

3 
1,389 
I can understand most of Galois Theory and Number Theory dealing with factorization and extension fields, but I always...

Mar512 12:42 PM
camilus

3 
2,755 
A necessary and sufficient condition for three vectors to be coplanar is the equality is that the determinant of the...

Mar112 04:52 AM
Deveno

3 
1,908 
Why does the half of the absolute value of a matrix formed with its coordinates give the area of a triangle?
I...

Mar112 03:44 AM
Jim Kata

3 
1,442 
1. Imagine a positive point x not equal to zero.
2. Consider a randomly chosen point y with distance to zero less...

Feb2912 12:24 PM
Loren Booda

3 
1,096 
i am interested in Riemann zeta function. i am in a high school.
i have good hold over calculus(at least what's...

Feb2912 10:34 AM
lostcauses10x

3 
1,434 
I read this through wikipedia and some other sources and find it to be unsolved. Erdos offer a prize of $5000 to prove...

Mar112 06:42 PM
ramsey2879

3 
1,832 
My main interest is usually physics, however I have become interested in the Fibonacci sequence. I looked at the...

Mar412 03:27 AM
AntiCrackpot

3 
1,173 
Hi all.
From Hoffman and Kunze's book Linear Algebra, page 27, exercise 12:
...

Mar412 02:55 AM
asmani

3 
751 
A Quasiperfect number is any number for which the sum of it's divisors is equal to one minus twice the number, or a...

Mar512 01:22 PM
Joseph Fermat

3 
1,444 
Question: Show the set of all differentiable functions on (infinity, +infinity) that satisfy f′ + 2f = 0 is a vector...

Mar512 09:34 AM
Fredrik

3 
1,621 
Sorry for thumb terminology, I just would like to grasp the main idea, as a physicist, without unnecessary...

Mar1712 08:25 PM
mclaudt

3 
1,760 
Hello,
I have a quick question about extension fields.
We know that if E is an extension field of F and if we have...

Mar712 12:04 AM
mathwonk

3 
1,159 
My linear algebra textbook presents a technique for computing the transition matrix from an old basis B' to a new...

Mar1012 02:06 AM
chiro

3 
1,062 
I do not if it is the right section, however
hello
I'm Antonio and I am Italian so I apologize for my English.
I...

Mar1112 09:11 AM
epsi00

3 
957 
Consider a polynomial of the following type:
A_n w^n + A_{n1} w^{n1}k + A_{n2} w^{n2} k^2 + ... + A_1 k^n =0 ...

Mar1312 08:38 AM
lunogled

3 
1,309 
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 
1,371 
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 
1,092 
Hi everyone, I always have trouble on decomposing number into irreducible factors inside Gaussian integer field. I...

Mar2112 05:50 AM
Norwegian

3 
981 
Hello,
I have a linear algebra problem that I need help with.
Basically, I need to get the eigenvalues and...

Apr1212 09:13 AM
HallsofIvy

3 
3,679 
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 
1,767 
Given n by n matrices A, B, C. I know how to solve the Sylvester equation
AX + XB + C = 0
using the matlab...

Mar2612 03:24 AM
chiro

3 
1,429 
How the hell do you prove that the components of a vector w.r.t. a given basis are unique?
I have literally no idea...

Mar2612 01:38 PM
dodo

3 
872 
i am having trouble with some hw problems in my linear algebra course... the book is brescher and the teacher is sort...

Mar2812 10:41 AM
marathon

3 
2,188 
I am reading Kane's book on Reflections and Reflection Groups and am having difficulties with some basic geometric...

Mar3012 06:21 PM
Math Amateur

3 
816 
Hey,
I'm just trying to grasp ordering of groups and subgroups a little better,
I get the basics of finding the...

Mar3112 12:59 PM
jgens

3 
1,394 
let's say you are given the following matrix T:
T11 T12 . . . T1n
T21 T22 . . . T2n
. ...

Apr712 04:12 PM
morphism

3 
1,241 
Does anyone know of efficient software for the multiplication with an antitriangular matrix? These are matrices whose...

Apr412 12:36 PM
AlephZero

3 
994 
How would you prove, using the integral product, that the set of {cos x, cos 2x, cos 3x, cos 4x, ...} is an orthogonal...

Apr512 04:42 AM
chiro

3 
1,123 
if,
10x+1 divides nx
and 10x +1 divides 10n +1 , where x is a variable and positive integer while n is a...

Apr412 11:40 AM
sparsh12

3 
1,656 
On a finitedimensional vector space over R or C, is every norm induced by an inner product?
I know that this can...

Apr612 08:52 AM
morphism

3 
1,441 
Given a differential field F and a linear algebraic group G over the constant field C of F, find a PicardVessiot...

Apr1112 11:29 AM
morphism

3 
1,163 
So when dealing with a linear transformation, after we have computed the matrix of the linear transformation, and we...

Apr912 06:10 PM
stripes

3 
1,078 