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

Feb2313 09:24 AM
micromass

1 
46,292 
I believe I have a new method of proof for an already existing theorem. The theorem itself is quite elementary and the...

Dec1805 12:18 AM
mathwonk

41 
12,798 
It's not really homework, although that is where I encountered this first time.
I had to evaluate the integral from...

Dec1605 01:06 AM
d_leet

7 
2,059 
In Calculus what's that big symbol that's before a function stand for. I kinda looks like a big long f.
And then...

Dec1605 12:29 AM
Integral

25 
13,824 
Integrals are typically associated with measure spaces. For example, the Lebesgue measure for the Lebesgue integral...

Dec1505 11:44 AM
NateTG

2 
1,721 
This may seem like an odd question, but why are there two different ops for the normal and partial derivatives? i.e.,...

Dec1405 07:10 AM
matt grime

8 
1,400 
Hello guys, I am trying to prove that the function
f(u)=\frac{1}{(1+u)^2}
is Hölder continuous for 1<u \le 0 but...

Dec1305 01:00 PM
incognitO

3 
1,114 
Hi I was wondering what is the relationship between y=a^x for exponential and y=loga (x) for log
I koe that we can...

Dec1305 10:05 AM
motai

5 
17,165 
let be the integral..where \zeta(s) is the Riemann zeta function.
\int_{ci\infty}^{c+i\infty}ds\zeta(s)(x^{s}/s) ...

Dec1205 08:21 AM
shmoe

3 
1,532 
Can someone explain to me this part of the proof of the jacobian?
I dont know what they're talking about...I...

Dec1105 04:10 AM
leospyder

3 
8,915 
How do you determine when f is differentiably from a real analysis standpoint (no graphs and calculus)? Would I simply...

Dec1005 08:55 PM
JasonRox

12 
1,343 
I'm feeling a little stupid today and I need some help...:tongue2:
Assume that I have a radiallysymmetric 3D object...

Dec905 06:53 PM
hypermorphism

9 
17,857 
Hi all, I was wondering how to go about solving an optimization problem for a function f(x,y,z) where the two...

Dec905 02:19 PM
lynxman72

7 
2,141 
so i was reading something on the isoperimetric theorem at this...

Dec905 12:42 AM
JasonRox

2 
1,721 
Hello,
I could use a big helping hand in trying to understand an example from a text.
Let's say I have a convergent...

Dec805 03:42 PM
shmoe

3 
4,346 
As a problem I was asked to show that phi, as defined by:
\phi_n(t) = \frac{n}{\pi(1+n^2t^2)}
Satisfies the property...

Dec805 12:18 PM
DeadWolfe

8 
1,341 
let be the Lebesgue integral with a meassure \mu then if we call this integral..
\int_{X}fd\mu=I
my questions...

Dec705 11:01 PM
mathwonk

2 
1,548 
For the function f(x) given by:
f(x) = e^{2x} (x<0), = e^{x} (x>0)
I have got the complex Fourier Transform to be:...

Dec705 01:10 PM
MathematicalPhysics

2 
5,220 
I was just wondering about the dx and the end of an integral and evaluating integrals by substitution. When you...

Dec605 07:43 PM
Zurtex

3 
1,189 
Are there any computer programs, or computer systems out there that can compute trigonometric values for cosine for...

Dec605 10:57 AM
hypermorphism

4 
1,193 
It is asked from me to proove that dy/dx x^ n = nx^n1 without using the binominal theorem... any ideas?

Dec605 06:26 AM
HallsofIvy

8 
1,810 
I'm have some trouble distinguising definitions and require some help please:
is the epsilonn def. for...

Dec405 10:18 AM
Edgardo

5 
2,822 
Suppose you are given the equation of a line, and a given cosine function that the line intersects. How do you solve...

Dec305 12:39 PM
Edwin

6 
3,144 
Sorry if this is a wrong place to post this.
What does it mean that a turing machine M recognize language A?
Does...

Dec305 03:27 AM
Corneo

5 
5,137 
I understand hhow to use the chain rule for a simple 2 part composite function, however, I tend to have problems when...

Dec305 01:05 AM
benorin

4 
2,049 
If f is differentiable on (a,b), does it imply that f' is continuous on (a,b)? If so, is there a way of proving it?

Dec205 01:19 PM
Rocketa

11 
8,294 
I'm now studying Lebesgues measure on R^n, and when we finished constructing L (all measurable sets), we moved on to...

Dec105 10:05 AM
matt grime

15 
2,336 
So, I had a question for all of you, regarding the relationships between area and circumference, and surface area and...

Nov3005 02:29 PM
benorin

5 
10,696 
eval. double integal sprt(1+x^2+y^2)ds
S is helicoid and r(u,v) = ucos(v)i+usin(v)j+vk, with 0 <=u<=4 and 0<=v<=4pi...

Nov2905 03:39 AM
Galileo

1 
841 
Hi everyone
I need some help proving Pedoe's Inequality for two triangles, which states that
...

Nov2805 03:50 AM
maverick280857

8 
1,874 
Could somebody explain with due brevity why/how the set of padic integers is homeomorphic to the Cantor set less one...

Nov2705 11:39 AM
matt grime

1 
2,535 
hi there
im confused with this question..
Integrate 1) Sin(1/z) dz
and 2) Z sin (1/Z^3)
where Z is...

Nov2705 07:05 AM
HallsofIvy

3 
1,306 
I attempted to prove the following equality, but to no avail. Anyone is willing to lend a hand?
\int_0^{\infty}...

Nov2705 07:03 AM
benorin

5 
1,364 
This should be a proof of the fact that exp(x)*exp(y)=exp(x+y). Have a look at it:
\begin{align*}...

Nov2505 11:08 AM
shmoe

4 
3,735 
How does one conclude that \frac{d^{2} y}{dx^{2}} = \frac{dy\'/dt}{dx/dt} ?
Thanks

Nov2505 07:35 AM
John_Doe

7 
3,319 
The function of arclength c that minimises \int^b_{a}{y dx} is the catenary, but why? I have tried using calculus of...

Nov2505 12:03 AM
John_Doe

16 
1,687 
Id like to know if the following argument is valid.
Take an arbitrary function f(x). f(x)dx can be thought of an...

Nov2405 11:37 PM
dx

7 
1,731 
Lately, we've been going over these two theorems in class. I have a few questions to put forth.
1) I know that in...

Nov2405 10:06 PM
Hurkyl

3 
3,565 
Hi, I usually dont have any problems with Fubini's theorem, but there is something I just cant figure out. Let f be...

Nov2405 02:59 PM
Bernoulli

3 
3,147 
The covariant derivative is
A^\mu_{\sigma} = \frac{\partial A^\mu}{\partial x_{\sigma}} + \Gamma^\mu_{\sigma...

Nov2305 02:13 PM
pervect

31 
3,026 
Okay... i did solve it, but i wonder why the answer is what it is.
"a string 10 m long is cut in 2 so that one...

Nov2305 12:12 PM
Robokapp

4 
1,326 