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'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 
1,694 
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 
1,562 
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 
1,092 
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 
1,150 
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 
1,864 
Continuity equation is
dj+\partial_t\rho_t=0
where j and \rho are a timedependent 2form and a timedependent...

Mar212 01:10 AM
mma

2 
1,540 
Hi
Let D be an anisotropic tensor. This means especially, that D is traceless. \mathrm{tr}(D) = 0
Apply...

Mar112 12:42 PM
Joschua_S

5 
2,447 
Greetings,
I wonder if a proof of the relation between the directional cosines of two vectors and cosine between...

Feb2912 12:37 PM
Septim

5 
1,444 
Here is my maths seminar video:Visible Fibre Bundle,discussing the vivid picture of fibre bundle which is the basic...

Feb2912 07:52 AM
Tinyboss

1 
1,254 
Hi Everyone!
Somewhere I read <:uhh:or possibly I think so and am wrong> that christoffel symbols correspond to...

Feb2912 03:43 AM
Matterwave

1 
1,127 
I've been looking in various books in differential geometry, and usually when they show that a smooth manifold has a...

Feb2812 09:28 PM
mathwonk

7 
1,607 
Hey guys, I'm looking for a good treatment (good = concise, and clear) of affine geometry. Connections, parallel...

Feb2812 11:10 AM
Matterwave

4 
1,341 
Hi, I'm not sure if this is the right place for this....if it isn't if I could be redirected/if a moderator could move...

Feb2812 01:05 AM
Bacle2

2 
1,503 
Hi everyone:
How is the following derived? Just for example:
...

Feb2712 07:31 AM
dpa

5 
1,455 
How does one compute the modular group of the torus? I see how Dehn twists generate the modular group, and I see how...

Feb2612 09:17 PM
electroweak

2 
1,384 
By continuity I mean an unbroken fractal. With certain variants, one ends up with sharp gaps in the fractal.
...

Feb2612 06:58 PM
Matt Benesi

4 
1,307 
I would like to study the path components (isotopy classes) of the diffeomorphism group of some compact Riemann...

Feb2612 08:20 AM
quasar987

2 
1,321 
Hi All,
I am an idiot but I donot understand the parallel transport:
Parallel transport should be in surface...

Feb2612 05:30 AM
arkajad

3 
1,042 
Wikipedia gives the relationship between a cartesian and curvlinear coordinate system as
gi=(partial)x1/(partial)zi...

Feb2512 05:26 PM
Group_Complex

0 
1,062 
Hi all,
I am a little stuck on a problem I'm trying to solve for something I'm programming.
I'm trying to find the...

Feb2512 04:11 PM
Snoopey

2 
1,645 
Hi friends !!
Let E be a holomorphic vector bundle over a complex manifold M . We identify M with the zero section...

Feb2412 10:19 PM
mathwonk

2 
1,320 
i am trying to figure out how to calculate the circumference of a circle in the Poincare Half Plane. I know that...

Feb2312 02:54 PM
arkajad

1 
1,314 
Hi can anyone help me out with finding the interior angles of a pentagon on a sphere. I know two of the interior...

Feb2312 01:59 PM
mathwonk

2 
1,605 
I don't understand the fibre bundle structure of the Mobius band, described by my textbook.
"The base space ##X## is...

Feb2312 01:26 PM
Bacle2

11 
1,881 
Hello Everyone,
I'm currently working through a differential geometry book that uses Clifford's algebra instead of...

Feb2212 05:07 PM
arkajad

6 
1,546 
Hi
English is not my native language and I have these type of questions all the time.
I would like to know if the...

Feb2212 07:57 AM
probiner

2 
1,029 
Get latitude/longitude coordinates for NSWE corners from a center point 800ft out to each NSWE corner.
For example...

Feb2212 02:09 AM
programguru

0 
1,308 
Let M and F each be the set Z^+ of all positive integers.So the de Rham Cohomolgoy H^0(M) and H^0(F) is infinite...

Feb2112 08:14 PM
kakarotyjn

4 
1,332 
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 
1,431 
Please, anyone tell me how to proof this equation:
{R^\rho}_{\sigma\mu\nu} = \partial_\mu\Gamma^\rho_{\nu\sigma}
...

Feb2012 07:49 AM
arkajad

1 
986 
Hello all.
To define Borel Moore homology (http://en.wikipedia.org/wiki/BorelMoore_homology), one can allow...

Feb2012 07:03 AM
Jamma

1 
973 
When reading other threads, following question crept into my mind:
When given a manifold, why shouldn't I give it...

Feb1912 03:36 PM
Alesak

17 
2,395 
Hello Everyone,
I am just wondering what the difference in these is. Could someone please give a brief example of...

Feb1912 11:16 AM
Mike706

6 
1,645 
Hi,
I know that the mean curvature at an extremum point where the function vanishes must be nonpositive.can this say...

Feb1812 01:29 PM
lavinia

10 
1,420 
I read somewhere that a Geometry is a non Empty set and a subset of its power set which has subsets with at least two...

Feb1712 10:06 PM
chiro

3 
1,206 
Hi
I'm having trouble to fully understand the concept of Genus: https://en.wikipedia.org/wiki/Genus_(mathematics)
...

Feb1712 01:57 PM
probiner

3 
1,132 
I'm trying to come up with a way to order 'random' (poly) lines, knowing only the coordinates of the vertices (and,...

Feb1612 09:09 PM
Kyudos

8 
1,704 
Here is the situation I am concerned with 
Consider a smooth curve g: \to M where M is a topological manifold...

Feb1612 04:39 PM
Rick_D

9 
2,189 
I am currently looking at constructing a model of a 3D printed item based on a sequence of images of each layer of the...

Feb1612 11:03 AM
Nihuepana

0 
1,013 
Hey,
I'm wondering, what is an ouroboros formed as a ball instead of a circle called? That is, a ball 'eating...

Feb1612 09:14 AM
meldraft

4 
1,813 