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

Feb2313 09:25 AM
micromass

1 
31,142 
Say we have open sets from two topological spaces. A is an open subset of T1 and B is an open subset of T2. So for...

Sep2508 09:45 PM
jostpuur

1 
4,277 
I have a question about complex projective space... specifically CP1 which can be thought of as the action of C on...

Oct1108 11:51 AM
OrderOfThings

1 
1,347 
I am the captain of my schools academic team. One of the main topics this year is Spherical trig and I can't find out...

Mar1309 08:12 AM
thharrimw

5 
1,831 
I'm looking for a 'covering rectangle with smaller rectangles' algorithm with the unique feature of being able to...

May2212 06:03 PM
the_anomaly

2 
1,462 
The following was given as an intuitive explanation of understanding why a sphere's area is four times the area of the...

Sep1212 06:25 AM
phyzguy

1 
1,400 
I'm doing some programing and I am wondering how I can find the length of a Polygon's side (variable number of sides)...

Sep1508 03:36 PM
therealdrag0

2 
7,716 
Hello,
I need help. The topic is a gradient in spherical coordinates. In cartesian it is clear but in spherical...

Aug908 05:00 PM
deiki

3 
22,635 
I am confused on what is meant by the modulus of a Riemann surface. I have done some very quick searches through my...

Jun412 11:04 PM
mathwonk

9 
1,366 
I have been working on something in my spare time and I have to graph the particle's motion in three dimensions...

May1511 05:40 PM
theobserver

4 
4,411 
I am trying to turn a 3D parametric equation into a vector field for an experiment, but I am not having much luck. =...

May1711 03:54 AM
Unrest

2 
1,776 
Let h = det h_{alpha beta}. The number of dimensions is not necessarily four. Show that
\
delta h is the...

Jan1606 05:07 AM
dextercioby

1 
3,617 
Hey guys.
I am trying to find a shape that suits my needs.
The amount of vertexes can be any, but the fewer the...

Jan612 09:03 AM
Edgardo

5 
1,217 
I would like to explore writing differential geometry in matrix format and was wondering if any of the experts here...

Nov2209 10:27 AM
haushofer

3 
1,463 
Does anyone know what the metric tensor looks like for a 2 dimensional sphere (surface of the sphere)?
I know...

Jun2511 03:48 PM
HallsofIvy

2 
1,696 
Has anyone written on differential geometry for complex spaces where rather than z = x + iy we use z = r e^it (Polar...

Dec312 11:49 PM
thehangedman

0 
693 
An ellipse is a conic section. If you construct an ellipse using a cone, does the axis of the cone cross through one...

Dec808 02:33 AM
tinytim

3 
3,396 
http://en.wikipedia.org/wiki/Squared_square
It is known that simple perfect squared squares exist, with the lowest...

Feb2112 03:53 PM
TheFerruccio

6 
1,566 
Hello guys,
I keep hearing that Euclidean parallel postulate was broken through differential geometry, can someone...

Aug3109 01:24 PM
Jim

20 
3,030 
I have a sphere with the equation
(x3)2+(y2)2+(z+5)2=36
two question:
1. how do I find the equation of the...

Jan2510 07:50 AM
rasmhop

1 
5,313 
I was talking to a friend recently about the nature of infinity and Georg Cantor's Continuum Hypothesis and I recanted...

May2610 11:59 AM
TheAlkemist

2 
969 
I was wondering if topology has ever been utilized on the structure of DNA and how that applies to its functions? I am...

Sep810 12:18 PM
thE3nigma

2 
835 
I need some help getting from point A to B. Let's say we have the plain ol' heat equation
u_t=\Delta u
where the...

Dec2205 04:48 PM
the.bone

3 
1,874 
OK, this is more of a spot for an elaboration on a question I just posted in another thread. Not quite duplicating...

Feb106 08:46 AM
bchui

5 
6,492 
Hi
I'm looking for a simple definition fo the affine connection because I can't understand it's meanning , that...

Apr908 01:55 PM
LorenzoMath

12 
7,055 
Hi , everyone
I have a problem with geodesic equation .
I know the method of solving it , but I can't understand the...

Apr1508 05:21 PM
the shadow

14 
6,940 
I find that group structure of nsphere is SO(n+1)/SO(n) (at http://en.wikipedia.org/wiki/N_sphere). So I want to find...

Mar2212 10:12 PM
homeomorphic

7 
1,508 
Prove the theorem (Appolonius) for the triangle ABC where A, B, C are the respective points (a,0), (a,0), (b,C) on...

Jun1807 05:41 PM
thagamizer

2 
1,874 
Hello members,
I am a bit stumped on a mathematical problem. If this is in the wrong section I apologize. ...

Oct810 06:51 AM
thadman

0 
924 
How many independant components does the RiemannTensor have in n dimensional space?

Apr807 06:04 PM
Chris Hillman

5 
5,282 
What is the metric or distance between two points in a hyperbolic space of dimension n?

Sep108 03:46 AM
tgt

0 
1,818 
There are models I've come across in physics involving things such as a 4 dimensional surface of a 5 dimensional...

Sep1310 07:35 PM
lavinia

21 
2,855 
For n\geq 2, is there a smooth map f: S^n\rightarrow E (E is the equator of S^n) which has the property that the...

Sep3009 07:52 PM
TFT

2 
1,647 
Using the Mayer–Vietoris sequence, how can we calculate the
De Rham cohomology of the Kelin bottle?

Oct1509 09:17 AM
TFT

8 
3,603 
How can we prove that the tensor product between two tensors of lower rank forms the basis for ANY tensor of higher...

Feb2407 12:02 AM
Terilien

37 
4,302 
what is a good book in differential geometry. I currently know calculus, a bit about differential equations, a bit of...

Feb2807 03:16 PM
AlphaNumeric

2 
1,905 
how do we derive the formula for the parallel tranport of a general tensor? I understand the ones for covarint and...

Mar1807 06:05 PM
Terilien

0 
1,438 
i'm having a hard time computing these so could people show me several examples to help me get a better feel for them...

Mar2407 04:22 AM
cosmicstring1

7 
18,468 
What exactly is the exterior derivative? What is its motivation? how do you compute it? Most importantly why is that...

May2410 03:28 PM
Amadeuz

18 
5,171 
i was curious as to what exactly this is and more importantly, what motivates it. what are its applications?

Jun1310 04:27 AM
Living_Dog

35 
15,952 
what are they exactly?

Apr2407 02:26 PM
mathwonk

1 
1,172 