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Description: Mathematical discussions and pursuits.
 

Aether Displacement 
  ...Amazing discussion, yet Bell's Theorem? Add a dimension and you are knocking on your own door and let yourself in - and not just now. Really upper dimensional stuff might be bizzare, to say the least, and would need a lot more energy to manifest itself. Thin, silly beings attempted to abduct a farmer by lifting him up into... more »
By foolsrushin  - 4:11am - 1 new of 1 message    

Stuck on modal logic proof 
  Hi all I'm currently reading "Vicious Circles" by Barwise and Moss, and am stuck on a proof in Chapter 11, on modal logic. This is the first thing I've read about modal logic, so I apologise if my question appears stupid. I'll also give a bit of background since I have no idea how standard the authors' definitions and notations are: the... more »
By Rotwang  - 3:51am - 2 new of 2 messages    

Multi input Weiner Filter 
  For the standard SISO Wiener filter we minimize the cost J J=E[e^2]=E(d-W'X)^2 where W is a vector of weights and X is a vector of regressers. (d is desired output) Also ' denotes transpose. We do this by diferentiating wrt the weight vector W and arrive at the standard Wiener solution. However, in the case where W is asymmetric Matrix and d is a vector... more »
By HardySpicer  - 3:21am - 1 new of 1 message    

Symposium “Image Processing and Visualization in Solid Mechanics Processes” within the ESMC2009 Conference – Announce & Call for Papers 
  ------------------------------ ------------------------------ ------------------------------ ------------------------------ --------------------- (Apologies for cross-posting) Symposium on “Visualization and Human-Computer” 7th EUROMECH Solid Mechanics Conference (ESMC2009) Instituto Superior Técnico, Lisbon, PORTUGAL, September 7-11, 2009... more »
By tavares@fe.up.pt  - Jan 8 - 1 new of 1 message    

Probability & combination question 
  I'm having trouble knowing which methods I should be using to solve this question: (assume any other factors have no bearing on these simple probabilities) From the whole population if we found the probability of someone having blonde hair = 0.2 & P(not blonde) = 0.8 If I pick a random group of 10 people, how to I work out the... more »
By petertwoca...@googlemail.com  - Jan 8 - 4 new of 4 messages    

how to calculate e^ix ? 
  Write sum of the terms in e^ix form as you like for example I'm writing like this (e^ix+e^i35x+e^-4x) x (e^i22x-e^i4x+e^i5x) x....( )..x..... by multiplying by first 2 terms we will get 6 terms if number of terms are more we will get more and more terms. how to calculate them easily. cos c + cos d &... more »
By Nimo  - Jan 8 - 1 new of 1 message    

Sale Nike Adidas Gucci Puma D&G Bape A&F NFL Watch (world famous brand) 
  hi We are supplier in china Footwear Apparel Handbags Jeans&Pants Cap Accessory(world famous brand) [link] 1) Top quality, reasonable price, safe shipping, and best service 2) Sport shoes for men, women and kids with all sizes available 3) Sport shoes with different colors and styles available in stock... more »
By cicitrade10...@yahoo.cn  - Jan 8 - 1 new of 1 message    

compact sets 
  Hello. What is a compact set? What is an intuitive explanation of compact set? I cant understand the below definition: "An open cover for a set S, inside a topological space T, is a collection of open sets whose union contains S. A finite subcover is any finite subcollection of these open sets whose union also contains... more »
By oercim  - Jan 8 - 3 new of 3 messages    

Perpendicular bisector question 
  I'm having problems with my linear algebra again. Here's the question: "Find the equation of the perpendicular bisector of the line joining the points (a,b) and (2a,-3b)" The answer in the book is 8by - 2ax + 8b^2 + 3a^2 = 0. My progress on it: The perpendicular bisector must go through the mid point of the line... more »
By newbar...@gmail.com  - Jan 8 - 6 new of 6 messages    

Optical Computing: special issue - Natural Computing, Springer 
  CALL FOR PAPERS Special issue on Optical SuperComputing Natural Computing journal, Springer-Verlag ------------------------------ ------------------------------ ------ Scope Using light, instead of electric power, for performing computations is an exciting idea whose applications can be already seen on the market.... more »
By optical supercomputing  - Jan 8 - 1 new of 1 message    

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