Tag Archives: 4-D

John Baez: To get [the D4 lattice], first take a bunch of equal-sized spheres in 4 dimensions. Stack them in a hypercubical pattern, so their centers lie at the points with integer coordinates. A bit surprisingly, there’s a lot of … Continue reading

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Buckminster Fuller, 4D Tower: Time Interval 1 Meter, 1928 Gouache and graphite over positive Photostat on paper, 14 x 10 7/8”, Avery Architectural and Fine Arts Library, Columbia University in the City of New York, Image courtesy Avery Architectural and Fine … Continue reading

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Gender Wars

“There is more difference within the sexes than between them.”‒Ivy Compton-Bennett, Mother and Son “In all of human biology, there is no greater difference than of that between men and women.”—Some biology notes I found online These two statements sound … Continue reading

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Again I say: STRING THEORY MOTHAF**KAAAAAAAAAAS (Source: http://www.clunkyrobot.com/2008/07/thinking-4th-dimensionally.html)

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While the black and white populations of the United States have long differed in various social and economic variables — in income, years of schooling, life expectancy, unemployment rates, crime rates, and scores on a variety of tests — so … Continue reading

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Once you’re comfortable with 2-arrays and 2-matrices, you can move up a dimension or two, to 4-arrays or 4-tensors. You can move up to a 3-array / 3-tensor just by imagining a matrix which “extends back into the blackboard”. Like … Continue reading

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Pictures of the 3-sphere, or should I say the 4-ball? It’s a 4-dimensional circle. Even though these drawings of it look completely sweet, I have a hard time parsing them logically. They’re stereographic projections of the hypersphere. All they’re trying … Continue reading

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