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Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:25 AM
micromass
1 32,583
Let's pretend I have a bag of 40 marbles. 19 marbles are red, 21 marbles are blue. If I randomly pick 5 marbles out of...
Y 08:50 PM
HallsofIvy
7 212
The differential form of a stochastic variable can be expressed as $$dx=a(x)dt+b(x)dw(t)$$, here w(t) presents the...
Y 08:12 PM
chern
0 84
Imagine a million different names are in a hat, yours among them. Some number N of names will be drawn, decided by...
Y 08:11 PM
Ken G
18 352
Hi, I have never quite worked this type of probability question out, so would like some help please. Imagine...
Y 02:35 PM
Matterwave
4 217
Ok. I don't understand sets within sets. No one has been able to explain it to me simply. So you can have sets...
Y 01:54 PM
caveman1917
8 172
I remember someone telling me that it's impossible to create a program that determines whether a given program runs...
Aug29-14 08:11 AM
Jamin2112
6 215
Hi, I'm hoping to clear up a few uncertainties in my mind about proving that the identity element and inverses of...
Aug28-14 09:22 PM
"Don't panic!"
6 129
I have an application where I need to pick a probability distribution (x_{1},\ldots,x_{n}) at random and uniformly...
Aug28-14 03:05 PM
stlukits
4 208
I am interested to know, possibly in non-technical lay terms, which axioms are really needed to prove the Goodstein's...
Aug28-14 08:03 AM
jedishrfu
3 183
P -> Q P Q P->Q T T T T F F F T T F F T I understand the condition "P is sufficient for Q". But I'm...
Aug27-14 01:12 PM
Stephen Tashi
1 145
Hi can someone please clarify info regarding the application and validity of the Dickey Fuller test. If I perform...
Aug27-14 01:00 PM
EmmaSaunders1
0 107
I am trying to implement what's called the "second spectrum". Basically, you do this: 1. Take a time series of...
Aug27-14 11:57 AM
Stephen Tashi
3 173
I'm a starting amateur mathematician. I'm studying Gödel's incompleteness theorem and have a couple of rookie...
Aug27-14 07:43 AM
felipecoirolo
2 181
I find this problem pretty interesting and I'd like to know more about it and what topic of math it comes from. ...
Aug25-14 09:28 PM
FactChecker
2 140
The following problem is from "Probability and Statistics in Engineering - Hines, Montgomery" A potential customer...
Aug25-14 08:50 AM
Ken G
2 111
Undecidability of Q Below is a proof of one of the key steps in Godel's first incompleteness theorem. It appears to...
Aug23-14 11:45 PM
andrewkirk
0 46
Hi all, I was going over the poll http://www.physicsforums.com/showthread.php?t=766275, and I was wondering how one...
Aug23-14 04:02 PM
FactChecker
3 184
I'm reading about the exponential family of distributions. In my book, I have the expression f(x|\theta) =...
Aug21-14 11:09 AM
Greg Bernhardt
1 189
I am attempting to calculate the even distribution of units sale across a predefined range with a final average value...
Aug21-14 10:16 AM
Aston08
1 139
I have a function $$F$$ I am trying to find the error correlation between the function at one point and another....
Aug21-14 07:03 AM
Hepth
7 243
Are the Real numbers R a subset of the complex numbers C?
Aug20-14 07:37 PM
jostpuur
29 949
Forgive my ignorance; I'm a programmer and relatively math-minded, but I haven't taken statistics since high school. ...
Aug19-14 02:23 AM
Sheppie
8 437
I have been out of unversity statistics and biometry for a few years do date. I am working in a clical research...
Aug16-14 09:11 AM
Stephen Tashi
1 211
does anyone know sample codes with explanation on computing Geographically Weighted Regression using MATLAB?I am a...
Aug15-14 07:14 PM
Greg Bernhardt
1 284
I am trying to delete this thread but I am not sure how to - sorry
Aug13-14 09:59 PM
jedishrfu
4 230
Hi all, I Dont understand a principle from beardon, Algebra and Geometery chapter 2 real numbers... Please...
Aug13-14 12:04 PM
statdad
12 307
I have a group of dogs (3 brown male, 2 brown female, 4 white male, 4 white female, 5 black male, 4 black female)...
Aug13-14 07:07 AM
haruspex
5 205
"In multivariate probability distribution higher-order cumulants contain information of decreasing significance,...
Aug11-14 10:52 AM
statdad
4 321
Hi all, Firstly, hope I'm posting in the right place! I'm working with a company that works with air filters....
Aug10-14 01:16 AM
haruspex
3 282
Consider two independent random events A and B. Is the event A/B independent from event B? My real problem stems...
Aug10-14 01:02 AM
haruspex
20 2,126
Hi there, I have a bit of a confusing question, but I'll try to be as clear as I can in asking it. I have a set...
Aug10-14 12:56 AM
haruspex
7 2,054
If you take two arbitrary numbers from a set N - lets say N stands for the natural numbers - and add them together,...
Aug9-14 10:53 AM
HallsofIvy
23 603
Mathematicians have long held that infinite integers do NOT exist, but here is a very simple argument that shows that...
Aug8-14 02:45 PM
phinds
13 480
Dear All, I am a starter to machine learning and i am currently confused about the following problem: what is...
Aug8-14 09:26 AM
Stephen Tashi
10 337
Just refreshing my understanding of measurable cardinals, the first step (more questions may follow, but one step at a...
Aug3-14 04:17 PM
mathman
2 298
I have some data from gas emission samples, part of the data was sampled in a region with a characteristic A and...
Aug3-14 12:40 PM
FactChecker
25 682
Hello! :-) I' have a problem... I fitted experimental data with a second order exponential theoretical curve: ...
Aug2-14 03:27 PM
mfb
7 277
Boolean Algebra is a well known field of study in mathematical logic. In Boolean Algebra (BA), a statement can be...
Aug2-14 01:10 PM
adrianmitrea
21 1,022
So, I'm having a pretty lazy day and decided to do some thinking. And, while this usually turns out to be a splendid...
Aug2-14 11:50 AM
Hornbein
13 377
I have a list of scores between 0 and 1 generated by an information retrieval system - 1 being very relevant and 0...
Aug2-14 02:56 AM
Stephen Tashi
4 243

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