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

Feb2313 09:25 AM
micromass

1 
28,605 
Hello,
I am facing some problem with Poincare disc.
(1) How to visualize a Poincare disc?
(2) The arc which...

T 02:13 AM
Apogee

3 
147 
Dear friends, my book (an Italian language translation of KolmogorovFomin's Элементы теории функций и функционального...

Y 07:02 PM
micromass

3 
71 
I read that in any locally convex topological space X, not necessarily a Hausdorff space but with linear operations...

Y 05:09 PM
DavideGenoa

4 
110 
hi there,
I am trying to prove the following inequality:
let z\in \mathbb{D} then
\left \frac{z}{\lambda}...

Y 04:12 PM
FactChecker

7 
175 
I've taken basic undergraduate Real and Complex Analysis, and I've noticed they focus on different kinds of functions....

Aug3014 09:39 PM
FactChecker

5 
334 
I just completed a brief introduction to branch points in complex analysis, and I find it difficult to imagine/come up...

Aug3014 09:19 PM
FactChecker

2 
105 
I think I've found a proof where Rudin is actually too wordy! For your welcomed inspection, I will type a part of said...

Aug2914 12:51 AM
WWGD

4 
118 
I have to do a project on the dimension theory buy i cant find any info on it. This is the wikipedia page and if you...

Aug2614 10:00 PM
mathwonk

23 
496 
How to determine the function from its graph if it has a nonsimple shape?
Given a graph (see attachment) where set...

Aug2414 07:32 AM
HallsofIvy

1 
139 
I know this post is in the topology thread of this forum, for group theory, this seemed like the reasonable choice to...

Aug2314 11:21 AM
xAxis

2 
206 
Say we have two functions with the following properties:
f(x) is negative and monotonically approaches zero as x...

Aug2214 10:59 AM
ekkilop

2 
137 
Hi all,
Please help! I am reading the paper "A note on contiguity and Hellinger distance" by J. Oosterhoff and W.R....

Aug2214 12:13 AM
victoriaabc

2 
137 
Hi all, I am trying to construct a continuous matrixvalued function h=h(f,g) ; f,g in C^1,all defined in an open...

Aug1414 10:35 PM
WWGD

4 
506 
Recently I came across this information:
\text{S1} = 1+1+1+1+\dotsb= \frac{1}{2}
\text{S2} = 11+11+\dotsb=...

Aug1314 03:32 PM
mathman

1 
181 
We know that the derivative of the general Schwartz  Christoffel map (function) is:
f'(z) = λ(z ...

Aug1314 11:19 AM
D_Tr

2 
1,331 
Hello. I'm wondering if anyone has a table of transforms showing the result of an Abel transform on a Gaussian...

Aug1114 10:45 AM
Mr Boom

1 
219 
Just as we have orthogonal vectors/vector spaces/etc., we can have orthogonal functions/function spaces/etc. I'm...

Aug1014 09:45 PM
16universes

17 
394 
The Problem
Let x and y be real numbers such that y<x, using the Dedekind cut construction of reals prove that...

Aug914 06:40 PM
loops496

5 
268 
I'm trying to understand Čech cohomology and for this I'm looking at the example of ##S^1## defined as ##/\sim## with...

Aug714 12:05 AM
mathwonk

2 
1,519 
I am trying to reconcile the following statement:
" u<=eps*f means u=O(eps) ("u is order eps")... "...

Aug414 11:58 PM
Simon Bridge

7 
248 
Consider the sets ##X:= \{x\in\mathbb R^2: \enspace x(1,0)_2 \leq 1\}## (a ball) and ##Y:=co\{(0,1), (0,1),...

Aug414 10:34 PM
economicsnerd

2 
149 
Are plane and surface of sphere different metric spaces?
Can distance function of plane be applied as distance...

Aug214 09:00 PM
gianeshwar

6 
294 
I'm interested in topology/differential geometry and before I eventually graduate I am looking to complete an...

Aug214 06:50 PM
Matterwave

5 
257 
Just as the title says, what is a POD? I've tried reading papers but I feel I am missing something. Does anyone have a...

Jul2814 01:16 PM
joshmccraney

5 
1,297 
I am trying to show that for f in C , and ##n=0,1,2,... ## we have:
## \int_0^1 x^n f(x)dx =0 ## (&&) , then...

Jul1914 03:26 AM
WWGD

4 
645 
Hi All,
This is a followup to another post. Question is:
Is the restriction of an isotopy that is the identity...

Jul1914 03:23 AM
WWGD

6 
783 
Hi all,
Isn't the mapping class group of a contractible space trivial (or, if we consider isotopy, {+/Id})?
...

Jul1514 08:30 PM
homeomorphic

11 
2,265 
I've been reading Thomas Jordan's Linear Operators for Quantum Mechanics, and I am stalled out at the bottom of page...

Jul1314 04:05 PM
micromass

2 
1,379 
I was suprised to realize that foliation theory was actually closely related to topology. Indeed,...

Jul1214 08:28 PM
xaos

2 
1,907 
Suppose, for a suitable class of realvalued test functions T(\mathbb{R}^n), that \{G_x\} is a oneparameter family of...

Jul1014 04:32 PM
Greg Bernhardt

1 
2,595 
How to calculate
##\int^{\infty}_{\infty}\frac{\delta(xx')}{xx'}dx'##
What is a value of this integral? In some...

Jul614 04:49 PM
pwsnafu

14 
4,588 
I don't have the whole book A First Course in Sobolev Spaces by G. Leoni myself, but I have obtained a pdf file of the...

Jul614 12:00 AM
jostpuur

3 
1,388 
Visualizing a higherdimensional sphere seems impossible to me. The best that can be done is to come up with several...

Jul314 09:17 AM
Hornbein

2 
3,477 
Hello!
My problem consists of :
there is a representation of an uneven surface in terms of Fourier series with...

Jul214 03:33 PM
mathman

2 
2,036 
This question is in this rubric because I figured it belonged to measure theory, but I am ready to move it if I am...

Jul214 11:13 AM
nomadreid

2 
1,722 
Suppose we are given two functions:
f:\mathbb R \times \mathbb C \rightarrow\mathbb C
g:\mathbb R \times \mathbb C...

Jun1314 04:38 PM
mathman

1 
1,654 
Hi all,
Could you please help me understand the Fresnel integral and Green's functions? Could you please explain...

Jun1314 06:15 AM
159753x

2 
1,478 
series expansion: ln(1+x)=1x^2/2+x^3/3x^4/4+x^5/5+..........................∞
...

Jun1214 12:17 PM
statdad

12 
1,772 
Hello everyone,i am doing my project in image processing....
i have done video sementation using the Fourier...

Jun1114 05:42 AM
ramdas

2 
1,588 
Could anybody explain what divisors and the RiemannRoch theorem are intuitively, motivating them, without any jargon...

Jun1014 12:31 AM
mathwonk

3 
1,538 