Tag: Math

10 sigma in the news again

Image via Wikipedia Risks are magnified after a historically volatile event like Thursday. The 11.3% intraday move was a 10 sigma event (if you treat the daily range of SPY as a normal Gaussian distribution). Per the excellent blog at http://www.aleph.se/andart/archives/2009/09/ten_sigma_numerics_and_finance.html, a 10 sigma event can be expected to occur  in 1x 10^23 days or […]

Systems dynamics meets the Afghan war via Powerpoint

It is becoming a common practice to laugh at that slide, but try on this thought experiment: what if someone made a slide of a zoom in on the surface of a semi-conductor chip? Wouldn’t that seem as incomprehensible and “foolish”? and yet by the slow process of developing knowledge we have become capable of extraordinary […]

Chaos links of interest

Image via Wikipedia Chaos: Links http://classes.yale.edu/Fractals/ http://math.bu.edu/DYSYS/applets/ http://mathforum.org/library/topics/dynamical_systems/ http://www.student.math.uwaterloo.ca/~pmat370/JavaLinks.html Books: Chaos: Making a New Science. Gleick, James.  The best book on chaos. It has everything—wonderful storytelling, memorable characters, an exhilarating sense of intellectual adventure, and exceptionally good explanations of the main ideas and why they matter. Read this book! Does God Play Dice?: The Mathematics […]

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