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

Feb2313 09:24 AM
micromass

1 
40,149 
Hey, everyone. I'm trying to prove the following:
f_n and f_n are realvalued function in \Omega ...

Sep2610 04:01 PM
Landau

1 
774 
I am trying to linearize a function, f(x), where x is a normally distributed N(0,1) random variable. How can I...

Sep1510 04:05 PM
mathman

1 
898 
let be the functions f(x) and g(x) defined by an integral equation
g(x)= \int_{0}^{\infty}dy K(yx)f(y)dy
then...

Sep1710 08:06 AM
Eynstone

1 
619 
I've been reading a complex analysis book which had an example showing \sum^\infty_{n=1}1/n \cdot z^n is convergent in...

Sep2010 03:51 PM
mathman

1 
959 
Let 0<β<1
So, β^n > 0 as n > infty
Also, we can find γ>1 so that
{γ^n}*{β^n} > 0 as n > infty
e.g. γ =...

Sep2010 09:41 AM
Petr Mugver

1 
776 
Hi, for awhile I was agonizing over part b) of this proof of Theorem 3.2 in Lang's Complex Analysis.
But I think...

Sep2210 11:12 AM
Landau

1 
2,135 
Suppose that f:\mathbb{R} \to \mathbb{R} is continuous and f'(x_0) exists for some x_0 . Does it follow that f' exists...

Sep2110 03:35 PM
JG89

1 
826 
Hope this does not sound vague!
1) I a looking at the Poisson's formula for the disk. Can somebody give me an...

Sep2410 06:53 AM
hamster143

1 
829 
Can somebody give me an example whereby I use the inversion with respect to a circle (unit circle or otherwise) and...

Sep2410 11:22 AM
HallsofIvy

1 
1,745 
I need help trying to factor a trinomial. It has been a while, and I cant remember how to factor a trinomial with...

Sep2310 02:31 PM
LCKurtz

1 
1,554 
To find the volume generated by rotating an area bounded by 2 curves f(x) and g(x) around the xaxis
we use the...

Sep2310 08:54 PM
LCKurtz

1 
938 
I'm not sure I did this right. Someone please check me.
...

Sep2410 12:10 AM
JThompson

1 
832 
I apologize that I am posting this in this section, but...
I wish that people did not reply to a thread and then...

Sep2410 03:53 PM
zhermes

1 
680 
This is an analysis exercise, I don't get the definition of S. Could anyone explain, please?
See the attached pic.

Sep2610 01:51 PM
LCKurtz

1 
2,601 
Hi, I'm stuck on this problem here about composite function, help is appreciated:
Let g : > be Riemann...

Oct110 02:50 AM
Eynstone

1 
1,575 
From what I know it is a plane that kisses a point on the curve at point t of curve f(t) and it is a plane normal to...

Sep2810 11:58 AM
Petr Mugver

1 
3,023 
I'm sure this has been asked before, but the proofs I've seen use the fact R is connected or continuous functions is...

Sep2810 04:51 AM
HallsofIvy

1 
2,494 
Hello all, indeed this is always a question in my mind.
For a sequence, we can study the limit, let's say ...

Sep2910 11:35 PM
Office_Shredder

1 
718 
How does one form a laurent series about the point z0 = 2i
for the function:
4cos(z*pi) / (zz0).
Could one...

Sep3010 11:08 AM
HallsofIvy

1 
734 
I have an function with 4 variables. Each of the 5 variables are bounded between to real numbers. Is there an easy...

Oct110 08:39 PM
hotvette

1 
6,832 
Not a specific question per se but...
Is it possible to convolve a discretetime signal with a continuoustime one?...

Oct610 05:52 AM
Petr Mugver

1 
4,499 
Hi guys,
I've just started university this week and I've been given a mountain of assignments. One of them has a...

Oct910 08:11 AM
HallsofIvy

1 
2,745 
Hi. I'm a firstyear calculus student and I'm fairly behind with my work. The transition is tough and when i read my...

Oct1110 02:29 PM
Wizlem

1 
1,563 
Hi,
I work in a computational neuroscience lab, where we study human perception using Bayesian models. In our...

Oct1210 06:43 PM
Feldoh

1 
1,453 
Hello all,
May someone help me on this question:
Suppose the map F is an isometry which maps a dense set H ...

Oct1310 04:24 AM
wayneckm

1 
688 
Hi all!!
I hope this is the right section to post such a question...
I'm studying the theory of resolvent from the...

Oct2010 11:33 PM
Hawkeye18

1 
1,928 
I have been told that the following integral can be expressed analytically as a combination of error functions of t. ...

Oct1410 09:56 AM
JJacquelin

1 
922 
I was reading a book on the zeta function and came across this attributed to Jacobi. I have no idea where to find a...

Oct1610 06:34 AM
jackmell

1 
2,852 
First let me write out the definition of a manifold given in my book:
Let k > 0 . A kmanifold in \mathbb{R}^n ...

Oct1810 08:26 PM
JG89

1 
700 
I need help with this one:
Find fxy in:
ln(x+y)/(xy) .. the ln applies to the whole problem.

Oct1710 05:45 PM
arildno

1 
743 
If you differentiate the formula for the volume of a solid sphere, 4/3 \pir3, you get 4\pir2, the formula for the...

Oct1810 05:38 PM
tinytim

1 
3,326 
does anyone know a general way to deal with (infinity)(infinity) type of limits !!!
pl. help!!

Oct2010 12:51 PM
Mark44

1 
862 
I am trying to figure out which substitution to use to get this integral done:
\int \frac{du}{\sqrt{uu^2} \cdot...

Oct2410 09:11 AM
HallsofIvy

1 
803 
How would you find the volume in the first octant of the solid bounded by the cylinder y2+z2=9 and x=6?
I tried...

Oct2510 10:03 AM
HallsofIvy

1 
2,739 
I am interested in knowing under what conditions the EulerMaclaurin summation formula converges (including the...

Oct2910 11:36 PM
TriTertButoxy

1 
1,587 
I have an integral:
{\int}^{\pi}_{0}A(x)sin(x) exp(bsin(x)^{2})dx=1
I want to solve for A which is a function...

Oct2710 10:33 AM
Mute

1 
678 
Dear All
I am having trouble understanding the gradient vector of a scalar field (grad).
I understand that you...

Oct2710 02:41 PM
HallsofIvy

1 
1,591 
I have a definition that a piecewise continuous function is one which is continuous on all but a finite number of...

Oct2810 04:43 AM
Grufey

1 
1,082 
\Sigma_{k=0}^{\infty}\frac{a^k}{(kx)!}
Thanks!

Oct3010 08:47 AM
sylas

1 
635 
Question: Let f: \mathbb{R}^3 \rightarrow \mathbb{R} be given by f(x,y,z) = sin(xyz) + e^{2x + y(z1)} . Show that...

Oct3010 01:58 PM
arildno

1 
853 