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

Feb2313 09:25 AM
micromass

1 
26,549 
Hi,
I need to do this for some homework and I don't really understand... could anyone help with the following...

Oct1712 11:14 PM
coalquay404

1 
962 
I'm trying to write an algorithm that will create the smallest possible ellipse to encompass any number of points on...

Oct1712 11:40 AM
Physt

4 
1,078 
Take for example, the function:
a_0(z)+a_1(z)w+a_2(z)w^2+a_3(z) w^3+a_4(z)w^4+a_5(z)w^5=0
with the degree of ...

Oct1712 06:28 AM
jackmell

0 
744 
I am having trouble getting a set definition of what constitutes a manifold for example ,
I have the real plane...

Oct1512 11:59 PM
Bacle2

24 
2,032 
I got these people trying to say that you can orientate a solid oblong so that it looks half the length and width with...

Oct1512 10:34 PM
Simon Bridge

3 
1,059 
Suppose I'm given a random function:
(8+5 z+4 z^2)\text{}+(7 z+6 z^47 z^5)w+(3 z^2z^3)w^2+(8 z2 z^42...

Oct1512 08:18 AM
jackmell

0 
816 
I'm not sure if this is the right forum.
I'm actually trying to solve this for a computer program
given shape A...

Oct1312 10:10 PM
Muphrid

1 
1,280 
Hi, buddies, i am a mechanical engineering student, and while i was going through the concepts of Instant centers of...

Oct1212 09:37 PM
anandtr2006

0 
906 
If I start out with a flat beam of length a and then I fix one side and then bend the other side up to form an arc...

Oct1212 06:33 PM
Studiot

1 
1,328 
Can an ellipse's focal points be outside the ellipse? I have tried googling this, but without any good explanations or...

Oct1112 10:06 AM
HallsofIvy

4 
1,224 
Hello there,
This might be probably a simple question, but my wondering was:
Is there any relation between the...

Oct1012 01:36 PM
mathwonk

3 
929 
Hi all,
I am trying to understand geometric flows, and in particular the Ricci flow. I understand how to calculate...

Oct1012 12:29 PM
meldraft

8 
1,731 
I want to calculate the surface area of semi cylinder with one or both ends skew at a given angle. To calculate the...

Oct1012 12:28 AM
smstoankur

3 
1,441 
Given a Finsler geometry (M,L,F) and $$g_{ab}^L=\frac{1}{2} \frac{\partial^2 L}{\partial y^a \partial y^b}$$...

Oct812 05:29 AM
ngkamsengpeter

0 
655 
I'm developing a game for the iPhone, and I have a situation where I have a graphic that the user can drag around the...

Oct412 06:57 AM
MaTHFRo

0 
765 
in the wikipedia page for the Levi Civita symbol, they have a definition of the product of 2 permutation symbols as: ...

Oct312 07:34 PM
demonelite123

2 
3,276 
\frac{}{}Hello,
I've been trying to search for a general description for the Euclidean distance from a point to a...

Oct312 05:03 PM
heymaniknowyou

7 
1,512 
The relation between the vector operator curl and rotation in fluids and vector fields is treated thoroughly in many...

Oct112 08:11 AM
Paulibus

10 
1,488 
hey all,
in this book ;...

Sep3012 09:05 AM
zn5252

1 
1,128 
How do you solve ((grad(f(x,y,z))))^2?

Sep2912 08:04 PM
quantumfoam

17 
3,495 
I'm having trouble understanding the exponential map for nonlinear vector fields.
If dσ/dt=X(σ)
for vector field...

Sep2912 06:39 PM
quasar987

5 
1,296 
I posted this in yahoo questions, but perhaps this is a better place for it.
The Tesseract assumes that in order to...

Sep2912 01:38 PM
laserblue

14 
2,943 
This is really starting to bug me.
I built an object out of tooth picks and glue.
It's simple. An...

Sep2812 08:15 AM
Alfi

1 
1,143 
I have two vectors:
r1v=r1x*i + r1y*j + r1z*k
r2v=r2x*i + r2y*j + r2z*k
and
r1=Math.sqrt(r1x^2 + r1y^2 +...

Sep2712 10:31 PM
Muphrid

2 
1,021 
Here's a picture of an irregular tetrahedron, for reference:
http://i.imgur.com/Y626c.png
The base triangle...

Sep2712 05:42 PM
torchfire

15 
2,989 
Hi,
I have a curve defined by following parametric equation
\begin{equation}
\gamma(\theta) = 1 + 0.5...

Sep2612 06:50 AM
lavinia

1 
812 
Let $$f:U \to \mathbb{R}^3$$ be a surface with local coordinates $$f_i=\frac{\partial f}{\partial u^i}$$. Let $\omega$...

Sep2512 03:38 PM
dextercioby

3 
1,194 
Hello,
Can anyone tell me the general formula for commuting covariant derivatives, I mean, given a (r,s)tensor...

Sep2512 02:48 PM
dextercioby

2 
1,718 
If you have a Right Triangle and you have one angle, alpha. How do you find the other angle, beta?

Sep2212 10:08 PM
mathwonk

2 
1,136 
I have a starshaped geometry described by following parametric equation:
\begin{equation}
...

Sep2212 07:11 AM
nawidgc

6 
1,486 
Hey everybody,
I was reading in Singularities of differentiable maps by Arnold, GuseinZade and Varchenko and I...

Sep2012 01:00 PM
Vargo

2 
1,000 
Ok first of all I'd like to mention that I've searched the forum and didn't find anything similar, so hopefully this...

Sep2012 09:18 AM
lavinia

4 
1,333 
Hello!
Im trying to read some mathematical physics and have problems with the understanding of vector fields. Th...

Sep1912 02:58 PM
lavinia

5 
1,497 
How can one prove the formula for the surface of a cone as well as the volume of a cone without using calculus? Most...

Sep1712 07:03 PM
HallsofIvy

5 
2,106 
I’m curious, but no mathematician. Euclidean geometry is the only type for which I've had training (45 years ago). ...

Sep1712 03:15 PM
Faradave

13 
1,314 
http://chutzpah.typepad.com/.a/6a00e55180ed5c88340120a75cf644970bpi
How do the circles still intersect at the...

Sep1712 12:12 PM
mathwonk

6 
1,312 
can one construct a solid Klein bottle  a 3 manifold whose boundary is a Klein bottle as follows.
 Start with a...

Sep1712 09:14 AM
lavinia

3 
1,379 
I am a college student .My club is planning an exhibition on the theme "Topology".
Please suggest a main model for...

Sep1512 10:24 PM
chiro

1 
947 
Hello everyone.
I just created a YouTube video on how to draw 4, 5, 6, and 7 dimensional objects. Yes, contrary to...

Sep1312 10:23 PM
TGlad

3 
1,399 
Consider a point p in a manifold with coordinates x^\alpha and another point nearby with coordinates x^\alpha +...

Sep1312 04:56 AM
Trifis

7 
2,805 