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Monthly Archives: March 2011
Hilbert with Ladders, 2004 by Don Relyea (Source: http://www.donrelyea.com)
Noncommutative distances between industries
The distance from your house to the grocery must be the same as the distance back, but 20th-century mathematicians speculated about circumstances where this might not be the case. Very small-scale physics is non-commutative in some ways and so is … Continue reading
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Tagged Abelian, asymmetric, asymmetry, business, business school, commutativity, distance, investment banking, marketing, math, mathematics, maths, metric, non-Abelian, non-commutative, noncommutative, PR, quantum field theory, quantum physics, quasimetric, quasimetrics, symmetric, symmetry
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You know what’s surprising? Rotations are linear transformations. I guess lo conocí but no entendí. Like, I could write you the matrix formula for a rotation by θ degrees: But why is that linear? Lines are straight and circles bend. When you rotate something … Continue reading
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Tagged facts, image, intuition, linear algebra, linear mapping, math, mathematics, maths, matrix, projection, rotation, tensor, unintuitive, why
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Learning by Perfume Genius
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The Ascent of Mandarin (via sandy dreams in my backpack, man)
School vouchers’ effect on economic inequality.
http://www.bbc.co.uk/emp/9player.swf?revision=10344_10570 The Taiping “Heavenly Kingdom” historical mèmes: appropriating convenient parts of a foreign, exotic religion for one’s own needs. Buddhism in USA over the last 25 years; Christianity in China 100 years ago. sex is bad smoking, drinking is bad … Continue reading
