# Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
 Meta Thread / Thread Starter Last Post Replies Views Views: 2,561 Announcement: Follow us on social media and spread the word about PF! Jan16-12 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