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

Feb2313 09:25 AM
micromass

1 
26,448 
hello....
is it possible that we have a hypersurface of a manifold with nonzero Intrinsic curvature but have a...

Oct310 10:58 PM
dede102

0 
702 
Hi, I'm trying to learn some geometry. I'm a maths graduate but didn't take any differential geometry. I did take a GR...

Oct310 09:59 AM
quasar987

1 
873 
Prove what the area is of the largest rectangle which fits in a cube of side s.

Oct310 12:33 AM
Loren Booda

0 
890 
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 
2,034 
This should be a simple question for anyone familiar with basic algebraic geometry, but the concept is getting the...

Oct210 12:08 PM
Newtime

0 
636 
Helo..i have a problem about geometry..
How to show that the normal spherical image of x is never constant?

Oct210 04:11 AM
drc4rd1n

2 
1,175 
I'm trying to show that the Frenet frame structural equation for a curve in R_3 can be written in the following form...

Oct110 10:03 AM
lavinia

2 
1,594 
I've been working on this problem and would like some help or any hints.
Give an example of a nonempty set A subset...

Oct110 05:54 AM
Buri

2 
992 
Dear all:
I have a problem which may be simple for some of you.
Given an image, and I calculate its edges by...

Oct110 03:51 AM
Asuralm

0 
821 
Let T be the collection of subsets of R consisting of the empty set and every set whose complement is countable.
a)...

Sep3010 10:22 AM
VeeEight

1 
2,429 
How does one prove that the smooth structure on 2manifolds is unique? Source?
Thx!

Sep2910 11:32 AM
lavinia

4 
1,928 
Let M be a manifold and let f: m > R a Morse function.
Let x be a critical point of f and assume all critical points...

Sep2810 11:19 PM
Eynstone

1 
1,202 
My professor in lecture yesterday said that if a set is closed and bounded in a metric space it doesn't necessarily...

Sep2810 10:10 AM
Buri

2 
825 
Hi,
I am presently writing Python code to solve the following problem; fit the largest volume polytope (P1), with a...

Sep2810 03:05 AM
cr34m3

0 
948 
Hello, everyone.
Theorem) If each space Xa(a∈A) is a Hausdorff space, then X=∏Xa is a Hausdorff space in both the...

Sep2710 09:29 PM
emptyboat

2 
1,764 
Can anyone tell me a good quotation about topology?

Sep2610 10:54 AM
quasar987

7 
1,473 
The answer is pretty clearly yes, but , embarrassingly, I cannot find a good
argument to thiseffect. Any hints,...

Sep2610 09:04 AM
quasar987

1 
790 
Hello,
I am constructing a MATLAB script to tightly pack an arbitrary given geometry with spheres of a predefined...

Sep2610 12:02 AM
jgm340

1 
1,364 
I am having trouble proving this statement. Please help as I am trying to study for my exam, which is tomorrow
...

Sep2510 11:26 PM
jgm340

4 
1,611 
Hi all,
I am new to topology & geometry. I skimmed through the subject in various books so I might be asking simple...

Sep2410 09:49 AM
lavinia

41 
9,005 
The question says:
Show that if Q = x...x is a rectangle, the Q equals the closure of Int Q.
The definition of...

Sep2410 07:58 AM
VeeEight

1 
1,444 
hello,
i have a clarification question:
if i have a metrizable space, can any open set be written as a countable...

Sep2210 03:54 PM
Office_Shredder

1 
1,174 
Function Types: continuous, surjective, injective, bijective, continuous surjective, continuous injective, continuous...

Sep2110 09:44 PM
ded8381

4 
991 
My professor proved this result in class, but I don't understand the "simple" direction. He said that the above...

Sep2110 01:41 PM
Buri

2 
2,023 
Hi, Everyone:
There is an exercise in the beginning of Bott and Tu's Diff. Forms in
Algebraic Topology, of...

Sep2010 03:20 PM
mathwonk

7 
2,703 
there is a general result that
RPn is orientable if n is odd while nonorientable if n is even
how to prove this...

Sep2010 02:24 PM
mathwonk

25 
6,528 
My textbook is indicating to me that sometimes {x \in X : a <= x <= b} is an open set. How can this happen?
My...

Sep1910 08:44 PM
Office_Shredder

3 
1,523 
Hey,
I'm trying to do some optimization on a manifold. In particular, the manifold is \mathfrak U(N) , the NxN...

Sep1910 10:48 AM
BruceG

2 
816 
I heard this puzzle on the MathFactor podcast (which I highly recommend).
If you don't know what Asteroids is...

Sep1810 08:20 AM
DaveC426913

7 
1,604 
A. 2 circles that have the same center have their radiuses respectively 5 nd 3 cm. From A which is a point of the big...

Sep1710 01:25 PM
zgozvrm

2 
1,282 
Hey there,
For quite some time I've been wondering now whether there's a wellunderstandable difference between the...

Sep1710 05:41 AM
Tomsk

26 
3,607 
Do sets in a discrete topological space have boundaries?

Sep1610 05:02 AM
radou

2 
1,664 
Hi!
I've finally decided to tackle a diff geom book, but I'm having trouble with this Problem 4/Chapter 2 from Do...

Sep1610 02:59 AM
arkajad

1 
1,113 
Consider the two shapes circle and circle with a line attached it. (Figure is attached) Are they topologically same?....

Sep1510 11:17 PM
cesiumfrog

10 
2,745 
There are models I've come across in physics involving things such as a 4 dimensional surface of a 5 dimensional...

Sep1310 07:35 PM
lavinia

21 
2,577 
In an essence, using normal straightedge and compass construction, we can add, subtract, multiply, divide and find a...

Sep1210 03:44 PM
GenePeer

2 
2,606 
If k is an integer between 0 and min(m,n),show that the set of
mxn matrices whose rank is at least k is an open...

Sep1210 11:46 AM
Office_Shredder

9 
1,396 
I wanted to find out whether i could draw a certain figure or not , so i used graph theory to get an answer.Just...

Sep1110 07:06 PM
D H

4 
1,383 
The title says it all, basically I'm trying to figure out what the difference is between the two tensors (levicivita)...

Sep1110 12:21 AM
arkajad

9 
3,087 
I was wondering if topology has ever been utilized on the structure of DNA and how that applies to its functions? I am...

Sep810 12:18 PM
thE3nigma

2 
799 