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

Feb2313 09:24 AM
micromass

1 
46,266 
What is a good textbook on real analysis that has either a solution manual or solutions in the back. I have Rudin's...

Aug3110 07:59 AM
sachinism

7 
12,593 
Why the serie \sum\frac{1}{n} diverges and the serie \sum\frac{1}{n^{2}} converges? I'd appreciate an explanation...

Aug3010 03:59 PM
atomqwerty

4 
1,323 
A sequence \{x_n\} in a metric space (X,d) converges iff
(\exists x\in X)(\forall \epsilon > 0)(\exists N \in...

Aug3010 12:46 PM
JCVD

5 
1,461 
In the prove of \vec{r}(t) \;&\; \vec{r}'(t) \; is perpendicular:
\vec{r}(t) \;\cdot\; \vec{r}(t) \;=\;...

Aug3010 12:50 AM
yungman

3 
2,817 
Assume the situation in which I have a slope, a component of a function dependent on x and y, which is at an angle to...

Aug2910 09:14 PM
LukeD

8 
1,879 
Goal: to show yn=x
This particular part of the proof supposes that yn>x. So we want
an h>0 such that (yh)n>x
...

Aug2910 08:24 PM
epenguin

3 
2,418 
Hello all,
I am wondering the implication between almost everywhere bounded function and Lebesgue integrable.
...

Aug2910 06:02 PM
wayneckm

3 
1,724 
Is the space of all absolutely continuous functions complete?
I've never learned about absolutely continuous...

Aug2910 03:03 PM
Landau

7 
2,245 
I just jumped into a finite element methods course, and we are finding minimization problems and variational problems...

Aug2910 02:36 PM
Somefantastik

0 
823 
Hi,
I've been skimming through Knopp's book "Theory and Applications of Inifnite Series", mostly to get some...

Aug2910 12:51 PM
Petr Mugver

4 
786 
For a tangent plane to a surface, why is the normal vector for this plane equal to the gradient vector? Or is it not?

Aug2910 09:55 AM
StalkerM

2 
762 
OK, this is really confusing me. Mostly because i suck at spatial stuff.
If the gradient vector at a given point...

Aug2910 02:42 AM
richardlhp

3 
8,049 
hi, i just started freshman year, and i am taking the standard intro physics classes for physics majors', but i am...

Aug2810 11:15 AM
sponsoredwalk

3 
1,477 
The Airy function is defined as follows:
\textrm{Ai}(x) = \frac{1}{\pi}\int\limits_0^{\infty}...

Aug2710 02:39 PM
jostpuur

4 
3,241 
I have some nasty Integrals involving a couple of Hankel Functions. I've been trying for some time to do them but I...

Aug2710 04:47 AM
betel

0 
1,028 
First I need to post some pages of a book that I'm reading...
http://img824.imageshack.us/img824/5153/42785753.png...

Aug2510 01:48 PM
HallsofIvy

4 
1,044 
Hi!
I'm trying to understand how do i get the phase spectrum from a Fourier Transform. From this site
...

Aug2510 02:41 AM
Petr Mugver

7 
5,326 
Hi
I'm now reading about Vector fields, everything is clear and intuitive for me as curl divergence ..ect , except...

Aug2310 09:29 PM
qbert

26 
3,691 
where do a multiple Taylor series converge ??
i mean if given a function f(x,y) can i expand this f into a double...

Aug2310 03:31 PM
mathman

1 
1,690 
why are ther Taylor series in several variables (x_{1} , x_{2} ,....., x_{n} but there are NO Laurent series in...

Aug2310 02:54 PM
zetafunction

4 
2,489 
http://planetmath.org/?op=getobj&from=objects&id=4370
that's pretty much the proof of Stolkes Theorem given in Spivak...

Aug2310 05:39 AM
quasar987

1 
1,661 
I am looking for math software that will fit a set of points with a cubic spline (or other technique)....then allow...

Aug2310 04:32 AM
The legend

9 
2,249 
Let X be compactly embedded in Y. Assume also that
there is a sequence f_n in X such that
f_n converges to f weakly...

Aug2110 03:39 PM
NSAC

2 
1,978 
Consider the real function f(x,y)=xy(x2+y2)N,in the respective cases N = 2,1, and 1/2. Show that in each case the...

Aug2110 01:12 AM
Hurkyl

3 
1,184 
I was thinking how do I differentiate the domain of functions...
Suppose I have a function:
f(x) =...

Aug2010 02:44 PM
statdad

4 
1,432 
ehhh

Aug2010 11:25 AM
slider142

7 
1,608 
Here is a different way I (think I) proved that the derivative of e^x is...

Aug2010 11:18 AM
Mute

4 
1,232 
I know it's trivial....but how do you find the Fourier series of sin(x) itself? I seem to get everything going to...

Aug2010 02:51 AM
QuantumPhenom

8 
38,613 
This question comes from Theorem 16.3 of Bartle's "The Elements of Integration and Lebesgue Measure", in page 163. The...

Aug1910 08:36 PM
adriank

2 
1,927 
\operatorname{div}\,\mathbf{F}(p) =
\lim_{V \rightarrow \{p\}}
\iint_{S(V)} {\mathbf{F}\cdot\mathbf{n} \over V }...

Aug1910 06:32 PM
arildno

3 
3,984 
Consider the function g(t) = f(t)/t on , where f is measurable on . Does it follow that g is measurable on ? I know...

Aug1910 02:22 PM
Landau

2 
999 
I understand that showing \mathbb Q is not a G_\delta set is quite a nontrivial exercise, involving (among other...

Aug1910 01:36 PM
adriank

5 
2,415 
How do I integrate sin(x^2) please?
Not (sin(x))^2. Thanks again

Aug1910 11:23 AM
Char. Limit

9 
1,722 
In spherical coordinates, you have one angle that goes from 0 to \pi and one that goes from 0 to 2 \pi. I'm having a...

Aug1910 09:44 AM
NanakiXIII

4 
2,400 
Hey people can someone point out to me please where I'm going wrong with part B of this question, can't get it to look...

Aug1810 06:41 PM
luckyducky87

4 
3,613 
I'm reading about lateral derivatives...
I know that a function is said derivable on a point if the lateral...

Aug1810 06:13 PM
Taturana

4 
2,691 
Hello all,
I am currently studying multivariable calculus, and I am interested in the Taylor series for two...

Aug1810 09:11 AM
adoado

4 
5,611 
I'm not even sure if that's the right name, but my question is when you have a \delta under the integral.
For...

Aug1810 08:59 AM
Mute

10 
2,167 
Wikipedia shows a proof of product rule using differentials by Leibniz. I am trying to correlate it to the definition...

Aug1810 08:41 AM
ross_tang

5 
1,083 
How to solve these integrals, such as sqrt(a^2 + x^2) & sqrt(2 + x^2)
Please be as descriptive and simple as...

Aug1810 08:32 AM
HallsofIvy

2 
885 