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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 20thcentury mathematicians speculated about circumstances where this might not be the case. Very smallscale physics is noncommutative 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, nonAbelian, noncommutative, 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
Posted in Uncategorized
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
Hot Showers
You know what’s really nice about the U.S. of A.? Being able to take hot showers with lots of water, for pretty much as long as you like. Thanks, prosperity.
Posted in Uncategorized
Tagged amenities, appreciating things, capitalism, comfort, gratitude, heat, hedonic treadmill, technology, utility theory, warmth, wealth
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“The anchovies were nowhere near the sardines and the tuna. That’s because they were near the pizza toppings. But it was only a problem because this was a threedimensional grocery store. If it had been a thirtydimensional grocery store they could … Continue reading
Not saying I agree with this classification … but consider it a more topologically complex alternative to the ≅ℝ² picture of {positive vs negative affect} ⨯ {high/low energy} used in the “Miller mood map”. I’m not even sure if that’s the correct term for the ≅ℝ² story … Continue reading