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

Feb2313 09:25 AM
micromass

1 
31,077 
(X,\rho) is a pseudometric space
Define:
x~y if and only if ρ(x,y)=0
(It is shown that x~y is an equivalence...

Mar2512 03:13 AM
Lily@pie

2 
1,476 
Hello all
I was hoping someone could help me with the following problem.
I work on the railroads and my task is...

Mar2412 12:28 AM
chiro

1 
1,666 
Ok, so I don't have much of an intuition for frame bundles, so I have some basic questions.
A frame bundle over a...

Mar2312 07:41 PM
quasar987

39 
4,019 
How do I show that Maslov index satisfies the next property (product property).
Let \Lambda : \mathbb{R} /...

Mar2312 09:56 AM
quasar987

2 
1,172 
Given the complete classification of finite simple groups, can one say that the number of all conceivable 2D/3D...

Mar2312 06:21 AM
M Quack

3 
1,153 
I am struck in a place where i have to find length of a line(a in fig i.e between P1 and P2) in the form of r and...

Mar2312 03:32 AM
tinytim

1 
1,384 
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 
1,502 
I have a question about terminology. Suppose we have a space X with the property that:
for all x, x' in X and...

Mar2212 07:44 PM
micromass

3 
1,429 
Nevermind Found my own answer

Mar2212 10:15 AM
Tinyboss

1 
1,169 
Hi,
I am am currently taking a second course in geometry, the first part of the course concerns projective...

Mar2212 08:20 AM
chiro

4 
1,345 
Hi, I have a bilinear form defined as g : ℝnxℝn>ℝ by g(v,w) = v1w1 + v2w2 + ... + vn1wn1  vnwn
I have to show...

Mar2112 09:37 AM
Alesak

6 
2,059 
Hello
I have been thinking about dimensional analysis with respect to computer systems. It has become obvious to...

Mar2112 09:30 AM
D H

31 
3,427 
Dear Sir/Madam,
i am doing GR just for fun and have not any degree in neither physics or mathematics. My question is...

Mar2012 03:32 PM
Dom Claude

0 
855 
Hello,
Am working on a model that involves heat conduction in a semiinfinite solid. I have been using linspace()...

Mar1912 06:22 AM
meldraft

1 
1,231 
If a line segment of size L, is made up of an infinite amount of points. Then divided into half, and then half again,...

Mar1812 07:20 PM
micromass

5 
1,737 
One of the definitions of the tensors says that they are multidimensional arrays of numbers which transform in a...

Mar1812 12:51 AM
Shyan

11 
1,453 
My question is about a general comment made in differential geometry books:
There cannot be a single chart for the...

Mar1812 12:38 AM
ayan849

24 
2,446 
We all are familiar with the kind of differential geometry where some affine connection always exists to relate...

Mar1712 07:59 AM
ayan849

9 
2,940 
Prerequisite: Protractor
Requirement: Both the measurers and the object should be perpendicular to the ground
...

Mar1612 08:38 PM
moonman239

0 
1,837 
Hey guys,
I am confused about the concept of sections of vector bundles. Mobius band is nontrivial line bundle over...

Mar1612 04:40 PM
lavinia

2 
1,002 
I am not sure if this is entirely possible, as my spherical trig skills are lacking.
Would it be possible to...

Mar1612 08:19 AM
Insanity

2 
1,308 
Hi all,
I've been wondering about this for some time. While I am only familiar with the basics of differential...

Mar1612 05:30 AM
Alesak

16 
2,468 
I need any help with the next question I posted in math.stackexchange, thanks....

Mar1412 12:36 PM
MathematicalPhysicist

8 
1,063 
The vanishing divergence(s) of the stressenergy tensor, which proves/demands (not sure which) the conservation laws...

Mar1312 10:17 PM
marschmellow

0 
994 
I have made a geometry, see first attachment, I call the “Torbus”, from the two geometries of a Toroid and a Mobius...

Mar1312 02:40 PM
Ray Fischer

13 
2,516 
Or perhaps there is a more general function that sends to the next hypervolume? Can it be bijective? Continuous?

Mar1312 01:31 AM
Bacle2

7 
1,165 
Hello all
I work in railway transport.
I am trying to redesign an existing railway curve; the existing...

Mar1212 08:48 PM
Stephen Tashi

1 
884 
I'm just learning manifold geometry and tensor analysis.From the things I've understood till now,an idea came into my...

Mar1212 09:45 AM
Shyan

3 
1,029 
I've been trying to find an algorithm for finding a line passing through any 2dimensional polygon that will divide...

Mar1112 09:49 AM
jamnitzer

0 
1,220 
For you math people who like to express objects in a coordinatefree way, how would you denote the Riemann and the...

Mar1112 09:01 AM
Matterwave

3 
927 
Hi,
We are using a radio interferometer to measure the angular diameter of the Sun.
An in depth description of...

Mar1112 04:55 AM
omoplata

2 
954 
Dear all,
I am sorry for making a rather useless thread, but could you please guide me towards any relevant...

Mar1012 12:39 PM
Charles_Henry

0 
968 
Hi, I can't find any picture of a twotorus T˛ in the net after much searching. Does anyone have a link or can draw...

Mar812 10:55 AM
mathwonk

4 
1,431 
Hi,
I was wondering whether it's possible to define a rotation in 3 dimensions about the origin. Is it necessary to...

Mar812 10:52 AM
mathwonk

3 
1,410 
Hi all,
I am trying to make sense of a paper involving differenital geometry and Lie algebras. Here's the part I am...

Mar712 01:20 PM
ianhoolihan

1 
1,151 
Hi, I'm just wondering, a vector valued (or (n,0) tensor valued) p form is the same as a rank (n,p) tensor which is...

Mar712 01:36 AM
Matterwave

7 
1,875 
Hi,
I want to rotate vectors through 120 and they are unit vectors so they lie on a unit spheres. So basically the...

Mar412 11:01 AM
tut_einstein

4 
1,676 
I am trying to calculate the covariant derivative of the Ricci Tensor the way Einstein did it, but I keep coming up...

Mar312 06:29 PM
nobraner

0 
1,151 
I don't know anything about Unitary Ball
what is a Unitary ball? how make a unitary ball consider to a metric...

Mar312 02:37 AM
Matterwave

7 
1,212 
Assuming that we are working with an infinitessimally small region of a manifold so that we can consider only first...

Mar312 01:19 AM
Matterwave

14 
2,037 