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This gallery contains 6 photos. *

Which of these pictures come from a random normal distribution and which come from a mixed distribution? plot(rnorm,-3,3); mix <- function(x) { rnorm(x)+rnorm(x-3) } plot(mix(x), -3,3);

wavelets and multiresolution (Source: http://blip.tv/)

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Tagged basis functions, Fourier analysis, Gilbert Strang, Hilbert space, wavelets
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At least in Javascript, that’s how it works. Apparently floating-point operations are not exactly accurate in a computer, the way integer arithmetic or arbitrary-precision arithmetic is. Javascript scheherazade:~$ js Rhino 1.7 release 2 2010 01 20 js> .1+.2 0.30000000000000004 Berkeley … Continue reading

The Amazon preview was really funny! (Source: http://www.amazon.com/gp/product/1400054788?ie=UTF8&tag=hiremebecauim-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=1400054788)

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Tagged books, epistemology, finance quant, God, Jerry Falwell, long reads, probability, quant, quant finance, quantitative finance, religion
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Sigh. Apparently if you go beyond the Amazon preview, Unwin just makes up some numbers, plugs them into the Bayesian machine, and — poof! — calculates the probability he wants for God’s existence, 2/3 (which he later ups to 95%). … Continue reading

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Tagged Bayesian, philosophy, probability, Steven Unwin, Victor Stenger
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original Mandelbrot article on cotton prices as a Levy process

This is what I have been reduced to. Henry County Public Library, I curse thee. (Source: http://www.amazon.com/gp/product/0764503898?ie=UTF8&tag=hiremebecauim-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=0764503898)

Why did the mathematician who solved the first Millennium Prize problem— Poincaré’s conjecture that all 3-manifolds are ultimately equivalent to spheres—decline a million dollars and worldwide fame? (Well, he still got the fame or else I wouldn’t be talking about … Continue reading

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Tagged Deolalikar, Hamilton, heroes, Jormakka, long reads, math, mathematics, maths, news, Perelman, Poincaré
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