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

Feb2313 09:25 AM
micromass

1 
31,361 
hi friends,
Suppose we have a vector bundle E equipped with a hermitian metric h, and in a subbundle of E noted SE ....

Aug712 07:57 PM
Ben Niehoff

1 
1,054 
How can I calculate degrees of freedom of a rank (o,3) tensor, Aabc, that is mixed symmetry and antisymmetric in the...

Aug712 03:37 PM
sourena

3 
1,337 
Hello all, this is my first time posting on this forum, so to start with, it's good to meet you all and thanks in...

Aug512 09:36 PM
EuphoGuy

0 
889 
Suppose I have a vector space. There is circle with center at the origin of the vector space. There is also a line L...

Aug512 05:08 PM
meldraft

3 
1,985 
This about those magnetic toys buckyballs. My apologies, I don't really know any physics, so sorry if my terminology...

Aug412 04:33 AM
ImaLooser

1 
1,288 
Consider the unit ball B:=B_1(0)\subset \mathbb{R}^2. How can one prove that the set B\times B \setminus D, where...

Aug112 08:34 PM
lavinia

2 
1,026 
Ok, so I'm trying to plot the unit circle using the chebyvhev metric, which should give me a square. I am trying this...

Aug112 10:14 AM
meldraft

0 
1,290 
A math question about projections of lines: Say we have two straight lines which we consider as number lines...

Jul3112 07:28 PM
imurme8

0 
853 
Not much. Im not sure where to put this so mods move it as need
Anyways here is the back story,
We have been...

Jul3112 12:31 AM
chiro

3 
1,279 
For example, finding the properties of an n dimensional figure. Is this called something in math, or do I just refer...

Jul3012 12:15 PM
coeilsmicah

3 
1,153 
note:The tensors in the new coordinates system are represented by X'.
I have a question about the coordinate...

Jul2812 10:45 AM
Tensel

0 
1,117 
sorry if i posted this topic here..let P1 and P2 be a path partition of a graph.is it possible that P1 and P2 to have...

Jul2412 10:26 AM
kimkibun

2 
1,168 
Hi, All:
I am trying to better understand what happens at fibers of critical values:
Specifically, I had the...

Jul2312 03:48 PM
WWGD

0 
761 
Can somebody provide a solution for creating a nonregular icosahedron whose facets are sized in such a way that, when...

Jul2212 05:22 PM
diceman

2 
1,098 
Working on another problem here with varying results. I have three line segments in 3D and am looking to find what...

Jul2112 08:53 PM
chiro

1 
1,123 
Hi All,
I am currently reading Menzel's "Mathematical Physics" and one part in particular confuses me. When he is...

Jul2012 05:28 PM
cpsinkule

7 
1,741 
There is an Exercise in a book as following :
Given a Manifold M , if N is a submanifold , an V is open set then...

Jul2012 12:17 AM
Bacle2

2 
1,281 
I'm interested in the crossover of Lie groups/differential geometry and I'm a bit confused about the relation of Lie...

Jul1712 05:21 AM
TrickyDicky

5 
1,747 
Hi everyone,
I am having a little trouble with the difference between a covariant vector and contravariant vector. ...

Jul1612 04:36 PM
Matterwave

1 
1,488 
Hi,
I am not very strong in maths, so sorry if these sounds simple. If I have a 3D geometry of a pipe which has its...

Jul1612 08:26 AM
athuss

3 
1,375 
reading that the commutator of rotations on two orthogonal axes is i * the rotation matrix for the third axis
but...

Jul1512 01:57 PM
BWV

2 
1,023 
Hello everybody, i am new to this forum, i am not a physist not a mathematician, just an architect and i have a...

Jul1512 12:06 PM
micromass

32 
10,041 
I'm trying to give an answer to the following problem, I hope someone could come in help! Consider a smooth...

Jul1512 09:00 AM
finsly

4 
1,095 
Hi all,
I'm currently writing an iPhone application where I'm taking the following ellipse which I created in Adobe...

Jul1512 03:10 AM
MaTHFRo

6 
1,594 
Hi everyone,
What is a covariant derivative? I have looked online but the explanations are not clear.
I just...

Jul1412 11:00 AM
quasar987

4 
1,707 
I've been scratching my head over this one. I'm trying to find a system of equations to solve for points R and S. The...

Jul1312 08:52 AM
chiro

3 
1,397 
So as I have read in Schutzs book on GR, and I'm finding his section on tensors and one forms very confusing.
...

Jul1112 09:47 PM
lavinia

15 
1,999 
I'm trying to work out the mathematics of this for a school project.
Say you have 4 beacons arranged in a square (I...

Jul1112 07:25 PM
chiro

4 
2,437 
This might be more of an algorithm question than a math question: how do I go about distributing n points as evenly...

Jul1112 09:18 AM
phyzguy

4 
1,421 
What mathematics are necessary for understanding and using minimal surfaces particularly in quantum field theory? As...

Jul1012 04:27 PM
JPBenowitz

5 
1,118 
I can't seem to find on the web a site that gives the Z cohomology of the infinite dimensional Grassmann manifold of...

Jul912 06:22 AM
lavinia

4 
1,325 
On a bipartite graph a game of cat vs mouse can be played, with say both the cat and mouse starting on a "red" vertex....

Jul812 10:35 PM
KOSS

2 
1,432 
I am reading Munkres book on Topology, Part II  Algegraic Topology Chapter 9 on the Fundamental Group.
On page...

Jul812 05:04 AM
lavinia

1 
945 
Hi all!
It's already a couple of days that I'm trying to solve this problem. I've been given the following Kahler...

Jul812 04:37 AM
L0r3n20

3 
1,130 
On page 333 in Section 52: The Fundamental Group (Topology by Munkres) Munkres writes: (see attachement giving Munkres...

Jul712 09:06 AM
lavinia

3 
1,226 
This thread asks for help calculating the Z2 cohomology ring of the Klein bottle using intersections.
This is what...

Jul712 08:07 AM
lavinia

3 
1,779 
Can someone explain to me in detail, why the ratio of the circumference of a circle to its diameter is not equal to pi...

Jul512 05:46 PM
Allojubrious

11 
1,803 
I'm not sure if this is the right section, but what the hell.
I've been looking to buy a bluray of fractal zooms,...

Jul512 02:55 PM
Doofy

0 
759 
There is a part in the proof of sard's theorem where we restrict our discussion to a point x such that Df(x)=0, and...

Jul512 02:53 PM
Tinyboss

1 
990 
I am reading Thurston's book on the Geometry and Topology of 3manifolds, and he describes the metric in the Poincare...

Jul512 02:25 PM
L0r3n20

4 
1,581 