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General Math

- Math topics not applicable to the categories below. High-school Math
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:23 AM
1 33,184
Guys does anyone know of a technique to find the exponential of a tridiagonal symmetric matrix... Thanks in...
Aug23-10 05:14 PM
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....
Aug23-10 03:55 PM
8 1,483
I've got what might be a couple of very basic questions on the fundamental representations of locally isomorphic...
Aug23-10 02:04 PM
0 753
I noticed that, for resistors in a parallel circuit, where R1 is < R2, the minimum value is (R1)/2, and the maximum...
Aug23-10 09:27 AM
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...
Aug22-10 11:41 PM
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...
Aug22-10 10:17 PM
6 1,168
or pay a prepayment penalty? Il
Aug22-10 01:28 PM
4 653
What is Fermat's last theorem? and How is that related to primes numbers of form 3x+1 and 3x+2
Aug21-10 07:12 AM
2 860
A negative number has the minus sign as its own intrinsic operator. Has anyone thought of using the divide symbol in a...
Aug20-10 11:56 PM
6 1,290
Hi Two vectors A and B are equal if they have the same magnitude and the same direction . this property allows...
Aug20-10 05:19 PM
2 954
What do you think about Golbach's Conjecture? Statistical analysis has shown that it is highly unlikely to be False,...
Aug20-10 05:06 PM
0 1,680
Suppose I have any modular function, for example: f(x) = |2x + 4| + 3 I can rewrite the function in the...
Aug20-10 10:48 AM
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....
Aug19-10 10:32 PM
6 1,572
I'm trying to design a reading course for lattice based crypto, and while the book by goldwasser and micciancio is...
Aug19-10 02:21 PM
0 1,138
What is "in the distributional sense"? How to comprehend it meanings? What is the difference between "in the...
Aug19-10 01:11 PM
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...
Aug19-10 10:43 AM
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 =...
Aug19-10 03:20 AM
9 1,263
(Note: cross posted to DevMaster) Hey everyone, As we know, the arc length of a cubic Bezier spline is kinda...
Aug18-10 11:54 PM
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...
Aug18-10 11:30 PM
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...
Aug18-10 08:49 PM
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?
Aug18-10 06:14 PM
10 1,482
What's the process that needs to take place to be able to graph the following equation (not-using a graphing...
Aug18-10 03:35 PM
1 1,154
I have a question, about one equation which is: ...
Aug18-10 03:14 PM
0 714
Ok. Sooo. Let's say u have y=x+5. Then u know y-5=x. Now if u have y=x^2 - x. How would u rearrange it to find out...
Aug18-10 11:55 AM
4 1,139
All right, I don't have a problme with the concept, just a specific question. Is the absolute value of the...
Aug18-10 07:41 AM
3 1,400
Hello , Do you know examples of functions belonging crowds O(sin (n)), Ω (sin (n)), Θ (sin (n)) ?
Aug18-10 05:04 AM
3 2,041
While doing the Year Eight AMC (Australian Maths Competition), I came across this diffucult question... (By the way,...
Aug18-10 04:07 AM
2 1,699
Say I have two lists, List1 and List2 containing elements such as words. Some words are common two both List1 and...
Aug17-10 11:49 PM
4 1,116
hi every one, i have one doubt i studied abt trignomentry. there finding the triangle angle or side of the triangle...
Aug16-10 08:21 AM
3 1,118
Does anyone have any step by step guide to solving the Hamilton-Jacobi equation to find the trajectory and motion of a...
Aug16-10 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...
Aug15-10 07:30 PM
2 1,251
The proof is intuitively wrong, but I just can't figure out where. (Circumference = 2pi*r) 1. Consider a rod of...
Aug15-10 04:02 PM
34 4,085
While listening on my english lecture, my teacher told us that authors usually have similar word choices and sentences...
Aug15-10 02:01 PM
3 938
Does anyone have any suggestions on how to go about proving that \left\lceil\frac{1}{2}{\lceil \log...
Aug15-10 09:36 AM
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...
Aug15-10 09:35 AM
5 880
If two are equal to a third, do they all equal each other? Can you prove this?
Aug13-10 02:04 PM
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...
Aug13-10 08:07 AM
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...
Aug13-10 07:26 AM
2 1,015
is det(I+b*H*HH)=(1+b*||H||2F)? where HH is the hermitian, ||H||2F is the F-norm. thanks!!!
Aug13-10 05:36 AM
0 716
I came across this type of equation, and somehow I could not figure out how to solve it analytically. I ended up...
Aug12-10 10:18 PM
1 774

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