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Posted 1615 days ago (via blog.computationalcomplexity.org)

As I am sure you all know, the TV show Elementary (Premise- Sherlock Homes in Modern Day NY. He emails and Texts! Watson is a female! and...) had an episode that involved P vs NP in a big way. I think they would have been better off with a fictional problem (Bourbaki's conjecture in Recursive Algebraic Topology?) rather than a real problem that they could say rather odd things about.Sh...

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Posted 1615 days ago (via feedproxy.google.com)

The International Journal of Forecasting is calling for papers on probabilistic energy forecasting. Here are the details (taken from Tao Hong’s blog). In today’s competitive and dynamic environment, more and more decision making processes in the energy industry are relying on probabilistic forecasts. The applications of probabilistic energy forecasts spread across planning and operations of th...

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Posted 1697 days ago (via johndcook.com)

From Graph Theory in the Information Age by Fan Chung: Empirically, most real-world graphs have the following properties: sparsity — The number of edges is within a constant multiple of the number of vertices. small world phenomenon — Any two…Read more ›...

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Posted 1708 days ago (via flowingdata.com)

It's easy these days to get started with visualization. There are a lot of resources — books, tutorials, blogs, and …...

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Posted 1717 days ago (via matheminutes.blogspot.com)

A couple of years ago I was browsing the book section of a charity shop in Bedford and came across a copy of The Calculus of Observations by Whittaker and Robinson.Printed in 1926, a short flick through its musty pages were all that was needed to convince me that it was worth buying since, on the surface, this text appears beautifully obsolete. It contains methods for doing the type of number crun...

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Posted 1723 days ago (via feedproxy.google.com)

There are as many yellow dots above the bottom row of the triangle as there are pairs of purple dots on the bottom row. To see this, note that every yellow dot determines a pair of purple dots by projecting…Read more ›...

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Posted 1768 days ago (via feedproxy.google.com)

Magic squares are square arrays of numbers that have the same sum horizontally, vertically, and diagonally. It is the arrangement of numbers in an square. They were known to mathematicians since antiquity and they were believed to have mystical powers. … Continue reading →...

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Posted 1809 days ago (via johndcook.com)

The Python stack for scientific computing is more modular than say R or Mathematica. Python is a general-purpose programming language that has libraries for scientific computing. R and Mathematica are statistical and mathematical programming languages that have general-purpose features. The…Read more ›...

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Posted 1814 days ago (via gottwurfelt.wordpress.com)

Laura McLay asks why is it so easy to forecast the Presidential election and so hard to forecast the NCAA basketball tournament? Nate Silver famously predicted the winner of all 50 states; but if you look at the NCAA basketball tournament, it’s difficult to get much above the low-70-percent range in predictive accuracy. (Silver himself [...]...

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Posted 1829 days ago (via flowingdata.com)

It can be tricky picking the right seat at a dinner party. So much depends on how many people there …...