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

Feb2313 09:25 AM
micromass

1 
32,763 
Good day. I would like to ask for your help about our Statistical Analysis of our project. Our project is an alarm...

Feb2514 07:44 PM
Mastur

0 
320 
Here is a simple problem but with a lot of hidden difficulty:
We have a weather station somewhere in the country,...

Feb2411 09:58 AM
maswerte

22 
2,672 
Dear Fellows,
If we fit our data to a quadratic equation then What is meant by standard error for linear and...

Jun2914 10:19 AM
Stephen Tashi

3 
2,656 
Say if I had a random variable X that followed a Beta distribution B(a,b), and a and b were random variables.
How...

Apr2907 08:45 AM
Jason Swanson

4 
1,603 
On page 113 Munkres (Topology: Second Edition) defines a Jtuple as follows:
...

Mar2214 02:36 AM
micromass

3 
433 
If the average is 111.6 and if the SD is 2.8 and we are looking for the percent between the intervals of 90.6 and...

Nov1609 06:42 PM
math is fun!

0 
954 
A friend asked me this question, and I am not sure I know how to answer it:
...

Sep1404 05:53 PM
Gokul43201

4 
4,510 
I can't remember how to figure out this type of problem. I swear I figured this out once before, but now I am...

Dec304 08:50 PM
Math Is Hard

5 
6,028 
Given that the moment generating function of a random variable is
(e^t)/(2e^t) is there a way I can go backwards...

Jul2206 07:43 PM
balakrishnan_v

1 
9,345 
A set is countable if a 11 correspondence can be constructed between that set and the set of all positive integers J....

Jun711 01:00 PM
math771

2 
636 
Hi there! I'm trying to prove that every Dedekind cut A has an additive inverse A such that A + (A)=0*. We've...

Jul711 08:51 AM
micromass

1 
1,684 
How can you prove that a cubic graph with a bridge cannot be 3edge colored?
I guess one could try a proof by...

Sep1811 08:04 PM
math8

0 
1,653 
What is the minimum number of edges in a kchromatic connected graph of order n?
I have read somewhere that this...

Oct2211 03:28 AM
bpet

1 
3,541 
I have done 3 experiments. For each one of them, I have repeated the same experiment 100 times. Which gives me three...

Sep3013 06:15 PM
mfb

2 
2,619 
Ok, the proof looks simple since by defintion Cl A = intersection of all closed sets containing A. And textbooks give...

Jan408 01:11 PM
morphism

2 
5,382 
Good Morning,
I am trying to prove that any 2 open intervals (a,b) and (c,d) are equivalent.
Show that f(x) =...

Nov107 10:05 AM
MathColie

3 
6,103 
I have a question.....
"Is the quotient set of a set S relative to a equivalence relation on S a subset of S?"
I...

Jun308 01:17 PM
matheater

2 
1,877 
I hate it when a fact is so obvious that it isn't obvious how to prove it. Like showing that a subset of a finite set...

Sep304 07:23 PM
Mathechyst

6 
4,231 
Hello all.
While looking at vector spaces leading up to multilinear mappings i am having trouble right at the start...

May508 03:21 AM
CompuChip

5 
2,358 
Hello all
I cannot find a simple explanation of the meaning of this axiom, probably because it is considered so...

Jun2009 08:31 AM
Preno

4 
1,133 
Hello all.
Along the lines of unary and binary operations, could someone describe what 0ary operation is and...

Jul1109 01:18 PM
honestrosewater

11 
1,596 
Hello all.
While reading about ordered pairs in the context of the formal language of axiomatic set theory I came...

Jul2709 03:17 PM
matheinste

7 
1,325 
I have this question which I cannot seem to solve:
The joint probability mass function p(x, y) of two discrete random...

Nov2508 04:01 PM
mathman

6 
7,876 
mathworld defines the paradox like this:"Even though real arithmetic is uncountable, it possesses a countable...

Oct1703 05:54 PM
Hurkyl

1 
2,385 
i found in this paper the term in the title:
http://arxiv.org/abs/math.GR/9305201
what can you tell me about them?...

Apr1204 02:19 PM
matt grime

1 
2,595 
in this page ive encountered this topic (it's a topic from combinatorics, so it's relevant to discrete maths with sets...

Jul205 03:23 AM
MathematicalPhysicist

3 
1,660 
prove that \epsilon_0 is an \epsilon number and that it's the smallest number.
\epsilon_0=\lim_{n<\omega}\phi(n)...

Aug3006 03:18 AM
matt grime

1 
1,551 
i searched at amazon for books, and find some books about this topic, and i wonder what does this topic cover?
in one...

Apr1906 03:11 PM
Hurkyl

3 
1,893 
1)let P={p1,p2....} be the set of all prime numbers for every n natural, present n as a representation of its prime...

Apr2706 02:20 PM
HallsofIvy

33 
2,720 
i have a few question, that i hope they will answered.
1) let w={0,1...,n,..}={0}UN, and let f:wxw>w such that the...

Jun1506 02:21 PM
CrankFan

18 
1,657 
i need to prove that if x is the first of sub(\phi;a,\psi) then there exists 1<=i<=n and there exist firsts \phi' of...

Jul2306 08:55 AM
MathematicalPhysicist

1 
2,000 
i read that there are some logicians who do not use the axiom of choice in their axioms systems. i wonder what is the...

Aug3106 02:16 AM
MathematicalPhysicist

2 
1,394 
i have this question:
if: X=U X_i for every i in I, where X_i's are non empty and are disjoint, then X>=I....

Aug2108 09:27 PM
Kirk Hilliard

22 
2,237 
I have a few quetions which I'm trying to answer, hope someone can hint me to the right answer.
1.Prove/disprove that...

Mar2609 03:33 AM
MathematicalPhysicist

0 
815 
I have this question which I am puzzled from, hope someone can help me here.
Prove/disprove:
If X is a sequence of...

Mar2809 06:30 AM
MathematicalPhysicist

1 
899 
We are given two states 1,2 in an irreducible and positive recurrent Markov chain, and their stationary probabilities...

May2209 02:57 PM
Enuma_Elish

3 
4,425 
Let G be a graph with all its degrees at least three.
Show that G contains a cycle with a chord (a chord is an edge...

Nov910 12:12 AM
annie89

3 
2,153 
I have this next question which I am trying to resolve.
Let G=(V,E) be some graph (usually in this context threre...

Jan1511 03:27 AM
MathematicalPhysicist

3 
1,059 
I am given a graph G with 1000 vertices and 250,001 edges and I need to show there are two triangles in it with common...

Jan1611 03:20 PM
MathematicalPhysicist

1 
813 
Now, assume I have a white noise, n(t)\tilde \ N(0,1), i.e gaussian with zero mean and variance 1, and it goes...

Jun2213 03:18 AM
MathematicalPhysicist

0 
574 