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

Feb2313 09:24 AM
micromass

1 
35,740 
Do all linear transformations are matrix transformation? In a book by David C Lay, he wrote on page 77 that not all...

Aug212 04:21 PM
HallsofIvy

5 
8,038 
Hi,
I need help with matrix derivation. I have 2 matrices of dimension 2x1, A and B.
A = ^{T}
B = ^{T}
I would...

Aug912 12:53 PM
micromass

5 
2,999 
Def: A low discrepancy sequence is a uniformly distributed sequence with minimal discrepancy, O(logN/N).
Question:...

Aug212 03:26 PM
mehr1methanol

3 
1,403 
A is a square matrix. x, b are vectors.
I know for Ax=b, that given b, there are an infinite number of pairs (A, x)...

Jul2612 07:54 AM
HallsofIvy

1 
868 
Hi, I have the following problem that is solved, but I get lost at one step and cannot find how to do it in the notes....

Jul2612 08:03 AM
HallsofIvy

4 
1,155 
Hello everybody , I'm Adrian , new stupid among apes :biggrin:
This might sound silly or obvious according to a...

Jul2612 12:03 PM
micromass

20 
3,428 
Let M be a transformation matrix. C is the matrix which diagonalizes M.
I'm trying to use the formula D = C1MC. I...

Jul3012 06:40 PM
tamtam402

13 
2,051 
Sir,i have read in wikipedia that for a relation to be ordered it should be transitive,antisymmetric,total...however...

Jul2512 01:03 PM
micromass

1 
1,296 
Hi everybody
I have a question that I have a guess for the answer but I want to be sure
I have an identity
...

Jul2612 01:10 PM
umut_caglar

1 
1,015 
I am struggling to find a way to count the number of irrational points defined recursively which satisfies specific...

Jul2612 11:21 PM
haruspex

2 
2,182 
Okay so I'm a first year engineering student and I'm taking linear algebra.
I understand how to take determinants...

Aug812 11:03 PM
johnqwertyful

11 
1,910 
Say I have a system of equations of the following form:
a_1 A^2 + b_1 B^2 + c_1 C^2 + d_1 = f_1
a_2 A^2 + b_2 B^2...

Jul2712 06:56 AM
HallsofIvy

3 
870 
Hello,
Problem, let B={a_1,a_2,a_3} be a basis for C^3 defined by a_1=(1,0,1) a_2=(1,1,1) a_3=(2,2,0)
Find the...

Jul2612 03:12 PM
Abuattallah

0 
580 
how do i determine the formula for the sequence below?
...

Jul2812 11:12 PM
spiritzavior

10 
1,975 
Hey guys! I'm new here, so forgive me if I'm posting in the wrong section.
I recently picked up a book on robotics...

Jul2912 01:23 PM
QuickLoris

7 
2,979 
Hi there,
As you know, we can represent a Linear vector operator as a matrix product, i.e., if T(u) = v, there is a...

Jul2812 03:11 AM
chiro

1 
1,106 
Assume P is a symmetric positivedefinite matrix,
and S to be a diagonal matrix with all its diagonal elements being...

Aug112 02:26 AM
chiro

3 
1,247 
I originally asked this in the Calculus & Analysis forum. But perhaps this is better suited as a question in Abstract...

Aug512 12:12 AM
rbj

6 
1,947 
For an arbitrary distance the equation is:
\sqrt{\Sigma_{i}^{n}x_{i}^{2}}
I would like to know what are the...

Aug112 04:12 PM
lavinia

5 
1,133 
I used to test orthogonality by using the definition MT = M1, which means I always calculated the inverse of the...

Jul3012 08:53 PM
DonAntonio

4 
1,319 
°I'm working on Mathematical methods in the Physical Sciences by Mary L Boas on my own, and I sometimes check Cramster...

Jul3012 06:34 PM
tamtam402

0 
693 
I am having trouble understanding the permutations of a finite set in general. I want to know what it may be used for,...

Aug312 01:59 PM
marschmellow

3 
1,141 
First,could you please clear this doubt
A polynomial with rational coefficients does not form a vector space over...

Aug212 09:47 PM
homeomorphic

4 
1,375 
Students familiar with Euclidean space find the introduction of general vectors spaces pretty boring and abstract...

Aug912 12:10 PM
Vaedoris

2 
1,320 
Hello everyone, this nxn matrix arises in my numerical scheme for solving a diffusion PDE.
M =...

Aug112 09:09 AM
Jonnyb302

3 
902 
Hi all.
Let C and D be codes of length n over \mathbb{F}_q of dimension k and k+l respectively.
I want to count...

Aug112 10:44 AM
chiaroscuro

0 
635 
Hello All:
Suppose I have a completely known linear system: A*x=b. I know the matrix A, and an x and the associated...

Aug112 03:35 PM
Blue2Sky

4 
699 
Attached is a graph of the number of goldbach partitions versus Hardy Littlewoods asymptote for even numbers of the...

Aug112 09:44 PM
Paul Mackenzie

0 
1,254 
Consider the following sequence, where the elements are rational numbers mulriplied by \pi:
(\alpha_{i}) = \hspace{2...

Aug312 09:17 AM
mehr1methanol

2 
1,413 
Let us take the most mainstream irrational out there, (Pi).
Now write (Pi) as:
3.
14159265...
Let us number...

Aug512 07:34 AM
mfb

3 
1,832 
Hello, this is rather vague but I had a lecture around a year ago about prime numbers and how a mathematician (Hardy...

Aug712 11:44 PM
Bacle2

4 
2,499 
This is very weird, but I found an inconsistency in the application of Cramer's Rule for a 3x3 simple linear matrix. ...

Aug1012 10:03 AM
DonAntonio

3 
1,041 
Hi, I have to take a placement exam in linear algebra this fall so I have been studying some past exams. This is a...

Aug812 12:06 PM
Fractal20

4 
1,068 
I have been investigating goldbach partitions for some time.
One interesting observation I have been able to...

Aug912 05:27 AM
Paul Mackenzie

2 
1,553 
Is there a way to define in how many ways can I form a number by it's portions?
e.g: the number 5 has 6 ways:...

Aug812 05:17 PM
gerben

4 
1,490 
There's a geometric interpretation of the determinant of an operator in a real vector space that I've always found...

Aug912 03:09 PM
dEdt

6 
1,517 
Hi, I have this problem that is solved, but I don't understand the theory behind it.
It says: Which of the...

Aug812 07:32 PM
jbunniii

5 
1,114 
What is eigen value, eigen vector etc and what is their physical significance?
Devanand T

Aug1112 05:57 AM
voko

8 
2,060 
I was thinking about identities, and seem to have arrived at a contradiction. I'm sure I'm missing something.
A(n)...

Aug1112 12:50 PM
physicsforum7

8 
1,450 
I have been having trouble of late with partial fraction decomposition. Not so much the maths, but the intuition...

Aug1112 01:37 PM
Taylor_1989

2 
1,013 