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

Feb2313 09:23 AM
micromass

1 
33,184 
Guys does anyone know of a technique to find the exponential of a tridiagonal symmetric matrix...
Thanks in...

Aug2310 05:14 PM
andresordonez

1 
1,658 
Someone try to solve this, and don't cheat and use a TI89 or similar CAS, a scientific calculator and a pen and paper....

Aug2310 03:55 PM
i2c

8 
1,483 
I've got what might be a couple of very basic questions on the fundamental representations of locally isomorphic...

Aug2310 02:04 PM
metroplex021

0 
753 
I noticed that, for resistors in a parallel circuit, where R1 is < R2, the minimum value is (R1)/2, and the maximum...

Aug2310 09:27 AM
Office_Shredder

1 
1,763 
Prove that \prod_{j=1}^{\infty}\left(1\frac{1}{f(j)}\right)>0 for all f:\mathbb{N}^{+}\to\mathbb{R}^{+} which satisfy...

Aug2210 11:41 PM
aq1q

11 
1,422 
My lecturer used a symbol in class that represents an element being removed from a set to form a new set. Does anyone...

Aug2210 10:17 PM
adriank

6 
1,168 
or pay a prepayment penalty? Il

Aug2210 01:28 PM
CRGreathouse

4 
653 
What is Fermat's last theorem?
and How is that related to primes numbers of form 3x+1 and 3x+2

Aug2110 07:12 AM
g_edgar

2 
860 
A negative number has the minus sign as its own intrinsic operator. Has anyone thought of using the divide symbol in a...

Aug2010 11:56 PM
Hurkyl

6 
1,290 
Hi
Two vectors A and B are equal if they have the same magnitude and the same direction . this property allows...

Aug2010 05:19 PM
rsoy

2 
954 
What do you think about Golbach's Conjecture?
Statistical analysis has shown that it is highly unlikely to be False,...

Aug2010 05:06 PM
Fraqtive42

0 
1,680 
Suppose I have any modular function, for example:
f(x) = 2x + 4 + 3
I can rewrite the function in the...

Aug2010 10:48 AM
Office_Shredder

3 
708 
Friend sent me this and I can't figure it out for sure. I think the answer is the Brits. Tell me what you think it is....

Aug1910 10:32 PM
AD7863

6 
1,572 
I'm trying to design a reading course for lattice based crypto, and while the book by goldwasser and micciancio is...

Aug1910 02:21 PM
Dragonfall

0 
1,138 
What is "in the distributional sense"? How to comprehend it meanings?
What is the difference between "in the...

Aug1910 01:11 PM
Hurkyl

12 
2,306 
We have a circle of certain radius.How many circles of smaller radius(we are provided with the ratio of radius) can be...

Aug1910 10:43 AM
Gerenuk

8 
13,203 
I've just found that, for all a>0:
\int_0^\infty \frac{a (x^2  1)^2  2 x (x + a)^2}{(x + a)^3 (a x + 1)^3} dx =...

Aug1910 03:20 AM
JJacquelin

9 
1,263 
(Note: cross posted to DevMaster)
Hey everyone,
As we know, the arc length of a cubic Bezier spline is kinda...

Aug1810 11:54 PM
Reedbeta

1 
1,455 
In a book of math puzzles Peter Winkler discusses the sequence x, x^x, x^x^x, x^x^x^x and writes about conditions for...

Aug1810 11:30 PM
starfish99

2 
1,338 
I have read in a book about bound vectors that we can not move them i mean that they can not move parallel to any...

Aug1810 08:49 PM
hoshii

8 
4,706 
Any suggestions on how to prove that
\prod^{\infty}_{j = 1} \left(1\frac{1}{2^j}\right) is greater than zero?

Aug1810 06:14 PM
hamster143

10 
1,482 
What's the process that needs to take place to be able to graph the following equation (notusing a graphing...

Aug1810 03:35 PM
mathman

1 
1,154 
I have a question, about one equation which is:
...

Aug1810 03:14 PM
Nemanja989

0 
714 
Ok. Sooo. Let's say u have y=x+5. Then u know y5=x. Now if u have y=x^2  x. How would u rearrange it to find out...

Aug1810 11:55 AM
Mentallic

4 
1,139 
All right, I don't have a problme with the concept, just a specific question.
Is the absolute value of the...

Aug1810 07:41 AM
betel

3 
1,400 
Hello , Do you know examples of functions belonging crowds O(sin (n)), Ω (sin (n)), Θ (sin (n)) ?

Aug1810 05:04 AM
disregardthat

3 
2,041 
While doing the Year Eight AMC (Australian Maths Competition), I came across this diffucult question...
(By the way,...

Aug1810 04:07 AM
ross_tang

2 
1,699 
Say I have two lists, List1 and List2 containing elements such as words. Some words are common two both List1 and...

Aug1710 11:49 PM
hoffmann

4 
1,116 
hi every one,
i have one doubt i studied abt trignomentry. there finding the triangle angle or side of the triangle...

Aug1610 08:21 AM
praveenpp

3 
1,118 
Does anyone have any step by step guide to solving the HamiltonJacobi equation to find the trajectory and motion of a...

Aug1610 04:16 AM
Piano man

0 
1,220 
I'm trying to figure out the best way to find a collision between a moving circle and a stationary line segment. I...

Aug1510 07:30 PM
ZippyDee

2 
1,251 
The proof is intuitively wrong, but I just can't figure out where.
(Circumference = 2pi*r)
1. Consider a rod of...

Aug1510 04:02 PM
adriank

34 
4,085 
While listening on my english lecture, my teacher told us that authors usually have similar word choices and sentences...

Aug1510 02:01 PM
CRGreathouse

3 
938 
Does anyone have any suggestions on how to go about proving that
\left\lceil\frac{1}{2}{\lceil \log...

Aug1510 09:36 AM
seeker101

2 
1,237 
Hi guys. I hope this is the right thread for my question. The question is for my project and I can assure you it's not...

Aug1510 09:35 AM
yotama9

5 
880 
If two are equal to a third, do they all equal each other? Can you prove this?

Aug1310 02:04 PM
slider142

8 
1,423 
does the following inequality holds for every POSITIVE 'x' ?
e^{x}1\le Cx^{1/4+e} here 'C' and e are positive...

Aug1310 08:07 AM
disregardthat

1 
890 
What does this symbol mean \bar{\in}? I know what \in is but I never saw it with a line on top.
edit. I figured it...

Aug1310 07:26 AM
g_edgar

2 
1,015 
is det(I+b*H*HH)=(1+b*H2F)?
where HH is the hermitian, H2F is the Fnorm.
thanks!!!

Aug1310 05:36 AM
xuej1112

0 
716 
I came across this type of equation, and somehow I could not figure out how to solve it analytically. I ended up...

Aug1210 10:18 PM
Dickfore

1 
774 