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

Feb2313 09:23 AM
micromass

1 
38,840 
I'm looking for the name of the optimistic conjecture that, if I remember correctly, conjectures the existence of a...

Aug1807 11:26 PM
mathwonk

4 
1,826 
silly question. didnt know where it was meant to go so i just put it here as safest option:)
suppose a curve C is...

Aug1807 04:44 PM
WWGD

3 
2,002 
Hi everybody,
In physics and mathematics, we often use the theorem that the circle alway has the smallest perimeter...

Aug1807 03:46 PM
arildno

1 
2,421 
Definitions:
"x is a limit point of A" = "All neighborhoods of x contain an infinite amount of points of A"
"x is a...

Aug1707 11:20 AM
MathematicalPhysicist

15 
6,882 
If f \cdot f and f \cdot f \cdot f is smooth, does it follow that f is smooth?
So does f \cdot f \in...

Aug1607 11:23 PM
Hurkyl

1 
1,379 
Hi,
I have a small fixed size packet of information that I want to transmit and detect errors with a high degree of...

Aug1607 07:15 PM
mgb_phys

1 
1,627 
How do we come to 4.pi.r^2?

Aug1607 02:33 PM
ron_jay

7 
23,301 
Could someone tell me which trig identity this chap (in a Physics textbook) is using to turn
sin(Kx)sin(2Kx)
...

Aug1607 02:11 PM
T7

2 
1,382 
I've done few examples about convolution and i understand it grafically but not mathematically. when two rectangular...

Aug1507 08:40 AM
tronxo

0 
1,698 
Hi there just a general question: this involves continuity and differentiability
suppose:
f(x) = sin 1/x if ...

Aug1507 05:03 AM
HallsofIvy

19 
3,839 
I thought this was really odd. I wonder if they found it by accident or were trying to do this...
...

Aug1407 08:02 PM
mongoose

23 
8,212 
I am not sure where this is exactly suppose to go but I need some help with the mathematics behind musical theory. I...

Aug1407 06:03 PM
mongoose

23 
2,982 
ok this is in an example in a firstyear physics textbook, yet some how i spent an hour trying to solve it...

Aug1407 02:55 PM
mohdhm

5 
2,763 
Try to solve this integral:
I=\int \frac{\sqrt{\sqrt{x^4+1}x^2}}{x^4+1}\,{\rm dx}

Aug1207 02:51 PM
dextercioby

3 
1,482 
Hi there guys. My first post here. I heard this forum was really helpful so i've signed up lol.I'm trying to get to...

Aug1107 09:54 PM
JonF

12 
24,192 
Hi.
I am having trouble proving that the irreducible representations of SU(2) are equivalent to their dual...

Aug1107 04:13 PM
arg

4 
1,597 
The following is a wellknown unsolved problem :
If n is an integer larger than 1, must there be integers x, y,...

Aug1107 10:36 AM
robert Ihnot

1 
2,434 
In this article, how do I rewrite (2) to get the third equation R(z)=... ?
thank you

Aug1107 05:21 AM
HallsofIvy

4 
2,002 
hi
Im currently 16, and just about to go into 6th form. Ive been reading up alot into maths quite a bit beyond my...

Aug1007 06:11 AM
Trail_Builder

2 
1,089 
hi guys, what is the relationship between y^2 = f(x) and y = f(x)?
thank you.

Aug807 07:33 AM
daveb

9 
6,891 
how would i find something like:
max where x\epsilon and ...
max where x\epsilon ...

Aug807 07:21 AM
smoothman

2 
3,477 
Hi,
How to find the equation if one root of a quadratic equation is 1 + 3i.
Regards,
Suganya
EasyCalculation...

Aug807 05:26 AM
HallsofIvy

2 
1,799 
Hey, I am not trying to prove anything here, just merely asking a question to something I tryed:
I found a relation...

Aug807 02:02 AM
Gib Z

13 
1,573 
What's the correct way to state the relationship between these two Lie groups? One is the "covering group" of the...

Aug707 10:13 PM
mathwonk

7 
1,699 
I thought that horizontal asymptotes were asymptotes and now I'm hearing that they can be crossed... Is this true? If...

Aug707 02:48 PM
MaWM

8 
12,130 
Hi guys, I have another weak problem here if you would care to help, please.
I am trying to convert between the...

Aug707 02:44 PM
mgb_phys

1 
1,486 
I wonder if anyone here knows any DERIVATIVE or differentiation book such as “Exercises in Integration” by Claude...

Aug707 12:21 PM
JasonRox

3 
965 
I'm trying to read a mathematical systems theory book (by Heij, Ran, and van Schagen) and he uses notation that I...

Aug707 12:19 PM
JasonRox

1 
1,102 
Dear all:
I have been read a few definition of the degree of a bezier spline. But I still do not understand...

Aug707 05:58 AM
Asuralm

2 
5,680 
consider: f:R \rightarrow R, f(x) = x^n for some n \epsilon N . I have the proof that f'(x) = nx^{n1}.
...

Aug707 03:01 AM
Werg22

18 
3,537 
In many areas of math doing something "backwards" is much harder that doing it "forwards", for example  inverting a...

Aug607 11:36 AM
symbolipoint

5 
1,929 
I find that when doing problems in pure maths, I need to look at the solution very often and is happy just to be able...

Aug607 12:32 AM
pivoxa15

7 
1,350 
Hey guys,
It's been a while since I've even done simple exponentbased math.
I'm trying to solve for x where...

Aug507 10:13 PM
BSMSMSTMSPHD

2 
1,288 
...to be used in a spreadsheet that drives Solidworks 3d tube models. Here is a picture of my problem:...

Aug507 02:56 PM
drankin

2 
1,238 
I am interested in what I call the "reduced exponential"
Sum_i=1 to infinity x^(i1) / i!
where x is a general...

Aug507 01:23 PM
CompuChip

5 
1,295 
I’m about to learn advances of mathematics. However, notations, symbols, such as Greek, etc, makes me MORE difficult...

Aug507 12:54 PM
CompuChip

4 
4,099 
My wife, who is great at math and did well for herself at Harvey Mudd, missed a question on a practice GMAT. At the...

Aug307 09:15 PM
marcflores

2 
10,392 
(Apologies for the lack of latex)
I was thinking today about simple ways of proving that the area of a circle is...

Aug307 08:40 PM
musicheck

4 
6,092 
What does the leading coefficient test determine? For example, if you test the fucntion f(x)=2x^{2}+3x+1 does the...

Aug307 06:32 PM
symbolipoint

4 
20,382 
Out of curiosity, what happens when you try to perform a trig function on a complex number? So, say, sin(4i+3)? Is...

Aug307 11:05 AM
Kummer

3 
7,002 