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

Feb2313 09:24 AM
micromass

1 
44,962 
What I have learnt in school is that differentiation and integration are opposites.
By integrating a function we...

Dec1812 01:58 PM
tensor33

8 
1,647 
I have been working through Spivak's fine book, but the part about differential forms and tangent spaces has left me...

Dec1212 09:19 PM
mathwonk

8 
1,570 
How would you find the roots of:
b  tan (b) = 0
please do not that i have to plot the graphs of y=b and y=tan b...

Dec1412 09:13 AM
TheoMcCloskey

3 
857 
I am looking for help with doing the following integral :
\frac{1}{2\pi i}\int_{1}^{\infty}\ln\left(\frac{1e^{2\pi...

Dec1212 01:20 PM
mmzaj

5 
1,041 
We know that d(cos^1 (x/a))/dx = 1/sqrt(a^2  x^2) (assuming a and x are positive)
So...Why the integral of...

Dec1712 01:16 PM
sahil_time

6 
1,077 
What is the Physical significance of Divergence and Curl?

Dec1112 08:06 PM
HallsofIvy

3 
655 
Hi,
If X \LARGE is a metric space and E \subset X is a discrete set then is E \LARGE open or closed or both?
...

Dec1112 02:49 PM
algebrat

12 
1,378 
if a function f is differentiable of can I integrate its derivative df on ?

Dec1112 08:15 PM
HallsofIvy

2 
787 
I have a function which depends say upon two variables: f(x,y) .
I need to find numerically the solution line ...

Dec1212 12:23 AM
haruspex

13 
1,822 
I have the double integral,
∫∫sqrt(x^2+y^2) dxdy, and the area D:((x,y);(x^2+y^2)≤ x)
By completing the squares...

Dec1112 10:10 AM
nickthegreek

0 
577 
U is a unitary mapping H to H, where H is hilbert space.
U = I + C, where I is the identity mapping and C is a...

Dec1112 05:40 PM
mark5907

0 
563 
Hi guys, attached is a picture of my problem and it is also underlined.
http://i48.tinypic.com/5zil9k.jpg
I've...

Dec1212 07:51 AM
HallsofIvy

2 
633 
Hi
I'm trying to determine the significance of a compact subset of a metric space in relation to calculus in...

Dec1412 10:20 AM
dylanbyte

5 
907 
I think the technique that is to be used for these types of problems, but I just am having trouble grasping why it is...

Dec1312 06:29 PM
lordofpi

6 
835 
I'm taking my first course in Analysis, and we learned a couple of theorems about Uniform Continuity. I have been able...

Dec1812 12:30 AM
zooxanthellae

2 
753 
z= (10j+elogj)2
I tried expanding but it just made it more complicated.
help please!!

Dec1712 03:41 AM
iampaul

5 
1,007 
Dear Forum,
I am a researcher in the field of microeconomics and I came across this equation which I would like to...

Dec2012 01:37 AM
Sammuueel

3 
943 
I'm working on a calculus project and I can't seem to work through this next part...
I need to substitute equation...

Dec1412 10:22 PM
Tenenbaum3r

2 
812 
So, obviously one can diagonalize any selfadjoint transformation on a finite dimensional vector space. This is pretty...

Dec1612 03:00 PM
the_kid

3 
1,051 
if J_{u}(x) is a Bessel function..
do the following functions has special names ?
a) J_{ia}(ib) here 'a' and...

Dec1812 08:24 AM
Mute

1 
656 
I've been working on a decentralized algorithm for finding local minima. Can anyone give me a few examples of mappings...

Dec1712 12:23 AM
AlephZero

1 
910 
Hi All,
I'm struggling with finding a solution to an adjustment I'm working on. Thought someone else may have some...

Dec1912 04:02 PM
mfb

4 
834 
Suppose I have a cylinder on a fulcrum that is filled half way with a fluid, how would I model the waves in the...

Dec1812 12:21 PM
JPBenowitz

4 
639 
We are doing complex numbers, polar coordinates, Euler's formula etc in class and there is this thing called the...

Dec1712 07:45 PM
wahaj

11 
1,008 
I have a problem in the Griffith textbook (Introduction to Electrodynamics), Question 1.21, where it asks what is the...

Dec1812 06:41 PM
Bruce Dawk

3 
1,206 
Let A be a compact operator on a Hilbert space H.
Let β1,...βn be an orthonormal set in H.
How to prove that...

Dec2012 09:09 AM
SVD

0 
497 
My first post and I am new to forum etiquette, please go easy on me.
I have an exam in a few days and have a good...

Dec1912 03:58 PM
LiveLowGrow

7 
850 
Hi everybody,
Please I want to Solve the system:
3x2y=19
y32x=19
x,y real number!
Thank you !

Dec1912 02:41 PM
naoufelabs

7 
1,018 
So I am trying to understand how and why the limits of surface and volume integrals come about. I think I came up with...

Dec2112 09:33 PM
marxLynx

2 
880 
Suppose I have the following transformation:
u = \frac{x}{x^2+y^2+z^2}
v = \frac{y}{x^2+y^2+z^2}
w =...

Dec2012 08:11 AM
lavinia

3 
690 
Can you please help me with the following problem:
Given a function of the form f(x,y) = (ab x)^2  (c  d y)^2, how...

Dec1912 03:39 PM
Essa1987

2 
1,033 
I have a definite integral defined by
...

Dec1912 04:50 PM
dextercioby

1 
839 
its components M(x,y) and N(x,y) are differentiable functions that satisfy (∂N(x,y)/∂x) – (∂M(x,y)/∂y) = 1x.
a. is...

Dec2012 07:31 PM
HallsofIvy

2 
862 
Hello,
I am trying to solve the following integral, which may be thought of as an integral of an...

Dec2012 10:09 AM
urbanist

0 
615 
I would like to understand how to find (if possible) the bilinear trasformation from the prevertexes of a Lshaped...

Dec2112 01:14 PM
Enialis

0 
663 
Can I calculate the volume of any function rotated once about the yaxis by multiplying the definite integral of that...

Dec2212 12:25 AM
Vodkacannon

2 
767 
Folks,
Is there a online source I can use for evaluating Incomplete elliptical integrals ##F(\phi,k)## and...

Dec2312 11:14 AM
bugatti79

2 
1,011 
I'm trying to evaluate an integral with e^x where x is huge in the domain of the integral so I can't evaluate it...

Dec2312 02:23 AM
Chain

7 
1,534 
Hi all. What does it mean that a function in polar coordinates may not be a function in Cartesian coordinates?
For...

Dec2412 01:03 PM
Stephen Tashi

2 
702 
I attached a page from my textbook, because there was something that I didn't understand.
What I don't understand...

Dec2412 09:41 PM
jgens

1 
535 