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

Feb2313 09:25 AM
micromass

1 
26,572 
I asked this question over in the QM forum, but it fizzled out there. I think it's more appropriate here anyway so...

Feb2810 07:48 PM
Talisman

8 
1,976 
What is a very good differential geometry introductory text?
My only background is Calculus (spivak). however, I'm...

Jul2509 08:23 AM
slider142

8 
6,356 
Can someone help me out whit this
I proved for the circle, but I can't prove it for this
Prove that x^4+y^4=1...

Jun1409 06:21 PM
gel

8 
1,468 
I read this:
A class T of subsets of X is called a topology on X if it satisfies these 2 conditions:
1. The union of...

Jul1009 10:41 AM
symbol0

8 
1,439 
Hi!
I'm trying to learn some geometry for general relativity, and I am having a bit of trouble understanding how to...

Aug1109 07:46 PM
HallsofIvy

8 
2,386 
I've been reading Shilov's book and the definition of a limit point is as follows: x is a limit point of A if every...

Dec2009 10:51 PM
haider ali

8 
3,739 
Seen a couple of pieces on gauge theories of finance equating arbitrage opportunities to curvature, for this to work...

Sep209 12:17 AM
zhentil

8 
1,327 
What should one know before reading this textbook?
I have taken a course in differential topology (it was called...

Sep209 06:06 AM
wofsy

8 
2,287 
hi there
What is a Poincare' disc and why is the edges of disc represent infinity?
thanks

Oct909 02:19 PM
wofsy

8 
1,702 
Using the Mayer–Vietoris sequence, how can we calculate the
De Rham cohomology of the Kelin bottle?

Oct1509 09:17 AM
TFT

8 
3,417 
Dear all,
I've always wondered where the name "manifold" comes from?
Any idea?
Thanks,
Goldbeetle

Dec1009 05:33 AM
HallsofIvy

8 
3,007 
I have a question here and i'm not sure what to do as it always confuses me, any help?
Let A,B be closed nonempty...

Jan710 01:38 PM
madness

8 
2,934 
Hello,
if one wants to represent a parametric curve in a Ndimensional vector space, the straightforward way is to...

Feb1510 04:48 AM
Fredrik

8 
1,498 
Is this a cone after Identifaction?
Let A = (I × I)/J
where J = (I × {1}) ∪ ({0; 1} × I) ⊂ I × I

Feb2410 07:43 AM
Mikemaths

8 
2,227 
Ok, I need some math info and I think this is the right section for my question, but I may be wrong. Is it physics?...

Mar1710 04:13 PM
Hoku

8 
1,373 
I've been trying to get a grasp on Lie Derivatives. I understand that we can represent a lie derivative acting on a...

Apr110 09:56 AM
linford86

8 
1,536 
After a century time, the millennium of Poincaré Conjecture has been solved by Dr. Grigoriy Perelman.
...

Mar2510 10:01 AM
TFT

8 
4,463 
Hello,
I am a newbie of this forum. Nice to meet you all.
When I read mathematical proofs or whatever, I always...

Apr1910 03:20 PM
TacTics

8 
2,394 
Electric charge continuity is expressed as ∂tρ + ∂iJi =0. (1)
The manifold, M in question is 3 dimensional and t is...

Apr2810 12:43 PM
Phrak

8 
3,385 
If I take a plane with n holes, would the fundamental group be that of the "bouquet of n circles"?...

Apr2410 07:40 PM
Bacle

8 
3,284 
Hi:
Just curious: a continuous function f:X>Y ; X,Y topological spaces, can fail
to be an embedding because...

May2510 04:36 PM
Landau

8 
2,886 
Hi, everybody:
I have read different sources for quotient bundle: Milnor and Stasheff, Wikipedia
Wolfram,...

May1910 01:44 PM
lavinia

8 
2,307 
I'm a beginner at differential geometry.
I have a problem about dual space. I understand why we use...

May2210 04:34 AM
haushofer

8 
2,719 
Given points A(x1, y1) and B(x2, y2), I'm supposed to derive the coordinate of the point C
which should be on the...

Jun3010 04:59 PM
SonyAD

8 
2,426 
Hello all, I feel a bit out of my league here :) if I've posted in the wrong section I'm so sorry...
I am looking...

Jun1310 10:49 PM
Phrak

8 
1,844 
I am new to this subject of topology. I want to know if bending and stretching of a manifold is same as a general...

Jun2810 05:28 AM
lavinia

8 
1,630 
Hi all,
I'm a physicist attempting to learn twistor theory. I'm confused by this notion of a tautological line...

Jul710 10:29 AM
chrispb

8 
2,254 
Is a curve (Say 'S') 1d or 2d? I ask this question because for so long i was under the impression that it was 2d,...

Jul1410 05:59 AM
asdfghjklqqww

8 
1,358 
it is easy to construct a map from S^2 to S^2, with covering time being unity
but how to do the similar task on the...

Jul2310 08:40 AM
wdlang

8 
1,083 
Hello all,
I am a newbie to topology. Hope someone can help sharpen my understanding.
I read a theorem that "if ...

Jul2210 05:53 PM
wayneckm

8 
2,381 
Is there a relationship between the homotopy groups of a pair (X,A) and of the quotient X/A ? It feels like they...

Aug110 11:12 PM
quasar987

8 
1,444 
They aren't equivalent in general, but do they ever coincide, and, if so, under what conditions? I've seen both...

Aug2710 05:33 PM
Rasalhague

8 
1,709 
Hi,
I have some doubts about the precise meaning of Euclidean space. I understand Euclidean space as the metric...

Aug2810 05:12 PM
Hurkyl

8 
3,490 
I'm trying to do a project that requires me construct a circle with n chords. I need to find the maximum number of...

Oct210 08:00 PM
quasar987

8 
2,045 
Do you agree that the following identity is true:
\int_S (\nabla_\mu X^\mu) \Omega = \int_{\partial S} X \invneg ...

Oct2410 07:06 AM
arkajad

8 
2,113 
I get in essence what the covariant derivative is, and what it does, but im having trouble with the definition, of all...

Oct2410 02:21 AM
Phrak

8 
1,210 
Hello,
if we consider the stereographic projection \mathcal{S}^2\rightarrow \mathbb{R}^2 given in the form:
(X,Y)...

Nov1610 05:06 AM
tinytim

8 
2,358 
I'm self studying some alg topology for next semester just working through chapter 0 and 1 of hatcher really. My...

Nov2310 06:07 AM
quasar987

8 
2,110 
Here's just a conceptual question about this proof.
One can show a space is X metrizable by embedding it into a...

Dec1910 04:35 PM
micromass

8 
2,619 
So, in Munkres' chapter about the StoneČech compactification, there is a Lemma at the beginning of the chapter the...

Dec2610 05:00 PM
radou

8 
876 