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

Feb2313 09:25 AM
micromass

1 
32,727 
Hi, I am new to this forum.
I was wondering if someone could explain to me what is the difference between the...

Jun711 05:09 PM
Rasalhague

4 
6,979 
I have some data (4 runs each of about 10 trials) which is binomial with n_hits/N_trials
n/N = 0/11, 0/9, 0/10,...

Jun511 08:43 PM
bpet

8 
2,909 
I have the following logical statement
(A \wedge B) \Longleftrightarrow (A \wedge C)
I want to find other logical...

Jun911 12:31 AM
praeclarum

3 
2,102 
Hello,
I'm hoping I'm asking this in the right place. If not, I apologize.
Anyway, I have a dilemma about some...

Jun611 10:02 PM
Lajka

4 
1,795 
Hello all,
I'm new, so please go easy on me if this is a silly question.
If I have a source set of characters,...

Jun411 07:16 PM
awkward

10 
2,657 
I have a question on the textbook "Mathematical Logic: Propositional calculus, Boolean Algebras, predicate calculus"...

Jun311 10:55 AM
omoplata

2 
1,095 
Hi everyone,
I came across a problem that requires knowing this fact.
But can any open set in R^n be expressed...

Jun411 04:48 PM
CantorSet

5 
5,389 
I have a question on the book "Mathematical Logic: Propositional calculus, Boolean Algebras, predicate calculus" by...

Jun311 11:52 AM
omoplata

5 
1,347 
Soppose that A,B are effectively inseparable,B is r.e,then how to prove that \bar{A} is productive

Jun311 10:24 PM
AKG

1 
1,043 
Dataset is given in file "tabl3.txt".
I know it has something to do with Binary response and probably we should use...

Jun311 05:57 PM
ghostyc

0 
886 
How do I get excel to work out a negative R value in regression summary output? This is because my data shows inverse...

Jun411 12:14 PM
Deathfish

0 
891 
If \mathbb{Z} is the set of integers, what does \mathbb{Z/2Z} mean?

Jun411 08:40 PM
omoplata

5 
2,479 
Suppose we are asked to prove :
If \lim_{n\to\infty}x_{n} = L and x_{n} is decreasing,then \forall n.
On the...

Jun911 07:38 AM
micromass

17 
2,153 
Hello, first I’d like to clarify that the only difference between an algebra and a sigmaalgebra, is that we have
...

Jun611 08:30 PM
Stephen Tashi

8 
2,170 
Hi everyone,
I'm confused about Durrett's formal definition of a random variable, as well his formal notions of...

Jun611 04:13 PM
disregardthat

1 
1,083 
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 
635 
Hi everyone,
The problem:
Is this relation true? If so, how (or maybe where) it could be proved?
...

Jun911 04:58 PM
sabbagh80

14 
2,446 
I see the term dictionary used a lot and it sounds a lot like a basis for a vector space. But what is the different? ...

Jun711 05:16 PM
PhillipKP

4 
778 
I'm having a trouble doing this kind of problems :S
Lets try this for example:
The joint p.d.f of the continuous...

Jun1311 12:03 PM
LCKurtz

2 
5,188 
There's a game that's been around for a long time called Connect 4. It is a 2player game consisting of 7 columns...

Jun911 07:03 AM
NickBach

2 
1,728 
If the empty set has no elements then how can it have subsets.
Or are we just saying because they don't have...

Jun1011 08:05 AM
cragar

12 
2,935 
Hi everyone,
The question:
Pr( A\Phi )=? where \Phi means empty
Is it equal to 1 or not?
what is the...

Jun1311 01:37 AM
sabbagh80

5 
1,749 
Say there is a chance p of an event happening each attempt. How many attempts (on average) would it take for this...

Jun1111 02:08 PM
micromass

1 
1,246 
Hi guys i am struggling in how to find the density function for X^2Y^2 and max(X,Y).
Here's the scenario:
Suppose a...

Jun1411 07:48 PM
Stephen Tashi

1 
2,045 
Hey all,
I recently encountered a problem that I cannot seem to solve...
Let's say I have the following coins A,...

Jun1311 10:31 PM
Stephen Tashi

3 
1,093 
This may be a dumb question but lets say i have the set of integers \mathbb{z}
can I say that \frac{\pi}{\pi}...

Jun1311 08:35 AM
cragar

5 
976 
Does the following make sense:
E(e^{X}) = 0 \Rightarrow X = \infty\quad a.s. ?
(Intuitively yes, but...

Jun1311 06:06 PM
micromass

1 
976 
Hello, my question ;
Suppose X1 and X2 are independent random variables, each with the standard gaussian...

Jun1411 06:36 PM
stukbv

18 
1,238 
Let M_t = \sum_{i=1}^\infty \frac{1}{i} (N_t^i  \lambda t) where \{ N^i \} is a sequence of iid Poisson processes...

Jun1411 09:11 PM
spamiam

1 
2,059 
Hi friends,
The problem:
Assume the events A_i for i=1,2,...,n are of the same type. please trace the...

Jun1411 09:53 PM
Stephen Tashi

8 
1,212 
I'm using excel to calculate this, but I have a few questions.
I have a list which has 48 values, one per day,...

Jun1611 09:59 AM
hoodrych

17 
2,522 
I need to find the bestfit distribution for this. I'm using excel, so I need to be able to use xcel to graph it.
...

Jun1611 09:37 PM
Stephen Tashi

3 
1,247 
If i have the mgf of X and the mgf of Y where X~N(mx,vx) and Y~N(my,vy) and X and Y are independent ,
then if i want...

Jun1511 08:19 AM
micromass

1 
1,206 
http://en.wikipedia.org/wiki/Black%E2%80%93Scholes
BlackScholes model assumes securities prices follow a...

Jun1611 09:44 AM
Tosh5457

0 
1,615 
I've been trying to fit some data to a Poisson distribution using Curve Expert but have been unable to program the...

Jun1711 11:51 AM
Proton Soup

1 
747 
Hi, I keep seeing this come up
A1 ⊇ A2 ⊇ A3 .... is an infinite decreasing sequence of events. Prove from first...

Jun1611 01:33 PM
stukbv

20 
2,265 
Is this possible? I've been trying to find ways to do it and the function looks more and more nasty the further I go....

Jun1611 09:57 AM
dabeth

0 
1,226 
Hi, I am a bit confused.
Basically if I have a pdf, fX(x) and i want to work out the distribution of Y=X^2 for...

Jun1611 01:02 PM
stukbv

0 
787 
I was reading an introductory chapter on probability related to sample spaces. It had a mention that for uncountably...

Jun1611 03:34 PM
SteveL27

2 
1,426 
Hi there, I'm currently reading Li and Vitanyi's book on Kolmogorov complexity. Unfortunately, I don't have a good...

Jun1611 09:20 PM
kanima

0 
1,178 