Tag Archives: abstract algebra

Climate Statistics

httpness: (studying statistics) Can there be a different standard deviation up and down? isomorphisms: Yes. it’s called a semideviation. (Or a quasinorm.) There are a lot of people who argue that semideviations and quasinorms are more natural than standard deviation … Continue reading

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Geotagging

Geotagged photos (e.g. flickr) and text (e.g. twitter) associate data to a particular point on the globe × time. In other words, a fibre bundle over S²×T. Imagine the position future historians will be in — if they can synthesise … Continue reading

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A lot of people think of “geometric” art as being math-y, in the same sense that the band Maps & Atlases is math-y. But I don’t think lines, circles, squares, tessellations, grids, and polygons are more mathematical than globs, leaves, aleatorics, … Continue reading

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Hilbert with Ladders, 2004 by Don Relyea (Source: http://www.donrelyea.com)

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A functor maps dots and arrows (elements and functions), respecting composition. In category theory, there are no disembodied, “objective” things — every Thing must come with an Interpretation.

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Movie Ratings

Another unmeasurable distance is ★★★ movie ratings. Movie ratings are drawn from the set {★,★★,★★★,★★★★,★★★★★} and related by the total ordering >: ★★★★★ > ★★★★ ★★★★ > ★★★ ★★★ > ★★ ★★ > ★ and the transitivity of > gives … Continue reading

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