Description:
Mathematical discussions and pursuits.
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Aether Displacement
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...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 »
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Stuck on modal logic proof
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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 »
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Multi input Weiner Filter
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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 »
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Probability & combination question
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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 »
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how to calculate e^ix ?
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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 »
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compact sets
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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 »
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Perpendicular bisector question
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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 »
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Optical Computing: special issue - Natural Computing, Springer
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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 »
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