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

Feb2313 09:25 AM
micromass

1 
26,565 

Feb1512 02:22 PM
1Truthseeker

0 
825 
Can someone please describe to me how Euclidean Geometry is connected to the complex plane? Angles preservations,...

Feb1412 08:29 PM
homeomorphic

4 
2,231 
I have some questions concerning the nine geometries of the plane and their physical significance.
(Euclidean,...

Feb1412 06:47 AM
arkajad

2 
1,579 
Hi! I´m trying to get an intuition for these concepts and was just playing at home.
My thought was to start with a...

Feb1412 12:29 AM
julian

23 
5,844 
I've seen many a 4D 'tesseract' projected onto a 2D planar surface, even rotating ones projected onto 2D, but I...

Feb1312 09:45 PM
PhanthomJay

7 
2,401 
Consider the (physics) situation of a sphere of radius R rolling without slipping on a plane. The configuration of the...

Feb1212 12:19 PM
Tinyboss

1 
1,009 
Dear All,
I am simulating a random walk on a sphere with unit radius. I want to move from current location p_t to...

Feb1212 11:22 AM
Tinyboss

2 
1,662 
Suppose we have either a massive or massless complex field in 3 space and one time dimensions. Suppose we force (or...

Feb1212 04:29 AM
arkajad

1 
982 
Picture of the problem:
http://i258.photobucket.com/albums/hh258/Plutoniummatt/Untitled3.jpg
As seen by the...

Feb1212 02:43 AM
tinytim

3 
1,587 
Hello, i got a question which i posted in Calculus&Beyond forum few days ago but no one answer in yet. So i think it's...

Feb1112 10:22 PM
v2536

0 
1,314 
Are there any similarities between 1/r and exp(i/r) where
r = (x^2 + y^2 + z^2)^.5? They both kind of go crazy as...

Feb1112 05:29 PM
Spinnor

0 
1,277 
Hey all,
How is it that f(f^{1}(E))\subset E for some induced metric E\subset Y, can be a proper subset of E,...

Feb1112 03:26 PM
IniquiTrance

5 
1,830 
Hi folks,
I have a basic question I would like to ask.
I ll start from the Euclidean analogue to try to explain...

Feb1012 11:58 PM
lavinia

4 
1,560 
Ok, I've been stewing on this problem for a couple weeks now, and it's primarily due to my lack of practice with...

Feb1012 09:39 PM
Matterwave

5 
2,781 
What topic in mathematics would something fall under if you assumed a complex shape to be a more simple shape? Such as...

Feb1012 10:52 AM
Tinyboss

2 
1,491 
please i want to know what is geometry image and what is the difference of 2d image
thank you

Feb1012 12:05 AM
reemakk

0 
888 
I'm working with 3D geometry, and I've been at this for days. I'm beating my head against a wall, because I'm nearly...

Feb912 06:09 PM
BrightstarVI

7 
2,168 
So I'm studying projective geometry and I'm confused about duality. In particular, I'm confused about drawing dual...

Feb912 05:11 PM
ZLife

0 
1,168 
Hi everebody,
I want to clear something.An ndimentional differential manifoled is locally endowed by topologies...

Feb812 02:51 PM
hedipaldi

8 
1,674 
Differential Geometry Library includes over 580 objects for differential geometry and its applications. Moreover here...

Feb812 11:10 AM
HelenGolovina

2 
1,437 
How to show:
Tabc = \Gammaabc  \Gammaacb
is a Tensor of rank (1,2)
Attempted solution:
1. Using...

Feb712 05:24 PM
psimeson

6 
1,558 
This is a proposition from Euclid that I want to prove (see attachment). AD and EF lie on a line parallel to BC. I...

Feb712 02:40 PM
tinytim

1 
961 
I'm currently studying abstract algebra from Herstein's interesting book "Topics in algebra", I've learned different...

Feb712 02:36 PM
Alesak

4 
1,876 
Hey guys,
I've often seen in the definition of a Fiber bundle a projection map \pi: E\rightarrow B where E is the...

Feb712 12:43 PM
Matterwave

17 
2,185 
In my notes, the following two functions are defined:
Suppose M^m and N^n are smooth manifolds, F:M \to N is smooth...

Feb612 02:57 PM
quasar987

9 
1,350 
My question have been post elsewhere, but since no one answer, please help me
prove:
Every planar domain of...

Feb512 05:39 PM
luie1168e

0 
970 
Hello,
I'm having a problem finding the minor and major axsis lengths of an ellipse from three points, the...

Feb412 05:31 PM
Vinni

2 
1,881 
Hi everyone. I hope I've found the right place for my first post here. I have a geometry problem which I need to...

Feb312 07:44 PM
morphism

12 
2,345 
We are given that ABCD is a rectangle and AE is the diameter of the circle, and BFGH is a square. I want to figure...

Feb212 08:21 AM
coolul007

2 
1,426 
Hello,
I'm having some problems. So for geometry class today, the teacher taught us this COS, SIN, TAN stuff. I got...

Feb212 08:18 AM
HallsofIvy

5 
3,807 
CD is a perpendicular from C to AB. Prove that triangles ACD and CBD are both simlar to triangle ABC. (See attached...

Feb112 10:00 PM
mathwonk

8 
2,134 
Let's say a city planner plans to place a fountain that is equidistant from where people will want to walk toward a...

Jan3112 07:28 PM
HallsofIvy

1 
1,183 
Hi everyone,
First of all I am not sure if I have chosen the right category for this posting but this looked the...

Jan3112 02:38 PM
Vasileios

1 
662 
I'm studying Bondi's work on gravitational radiation. He applied axial symmetry and reflection symmetry to a source of...

Jan3112 02:35 PM
PhyPsy

0 
1,028 
I have learned a lot of formulas for converting trigonometric values, but when I looked up sin(pi/10) I got the exact...

Jan2912 11:51 PM
chiro

8 
1,125 
Hi,
Why R mod 2pi is a Compact Manifold?
Isn't this like a real line which is not compact?
How should we prove it...

Jan2812 07:51 PM
Bahram_phd

6 
1,551 
On a 4 or 3 wheel vehicle with the front 2 doing the steering, both wheels need to track concentric arcs of different...

Jan2812 06:49 PM
Nehmo

0 
2,098 
Hello everybody,
I have a shape (polygon) made up from pixels (squares) similar to the image below. I need an...

Jan2712 09:45 AM
Edgardo

5 
1,940 
Cheers everybody,
I have a question regarding the LieAlgebra of the SO(3,1), i.e. the Lorentz group. The...

Jan2612 06:02 PM
morphism

3 
2,409 
suppose I got a projective camera model. for this model I would like to backproject a ray through a point in the...

Jan2612 10:16 AM
tdomhan

0 
1,181 