Mike Croucher has written a post about the next incarnation of the Carnival of Maths, which we are coordinating.
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- London: tic tac toe puzzles
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- Newcastle: mathsjammers deep in concentration
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- Newcastle: trying to arrange these blocks so that they form a correct sum.
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- Newcastle: Octiamonds
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- Manchester: inspired by today’s puzzles, @Andrew_Taylor has drawn this
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- Manchester: dodecahedron
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- Manchester: approximations of pi
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- Manchester: The playing cards and vinegar puzzle
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- Manchester: yet another game of Quarto
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- Manchester: Lomino-based excitement
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- Manchester: Serious game of Continuo
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- Manchester: several types of non-transitive dice
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- Manchester: mirrored cube assembly puzzle
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- Manchester: general maths detritus
Visualising the wrong data on the Guardian data blog
This visualisation shows for each council or unitary authority how many hours a week you’d need to work, earning minimum wage, in order to pay the median rent for a one-bed flat. The minimum wage is a national constant.
No justification is given for using the median rent. In a fair world, the median rent should be paid by someone on the median income. Assuming that people earning the minimum wage are the lowest earners1 and make up X% of the population, then an upper bound for rent paid by people earning minimum wage should be the Xth percentile, if housing is provided fairly2.
Continue reading “Visualising the wrong data on the Guardian data blog” on cp’s mathem-o-blog
MathsJam February 2012 Photos
Mockus, mathematician-king
Charlotte Bouckaert shared this story on Google+. It’s about Antanas Mockus, a mathematician and philosopher who was elected mayor of Bogotá twice. It’s a fascinating read.
People were desperate for a change, for a moral leader of some sort. The eccentric Mockus, who communicates through symbols, humor, and metaphors, filled the role. When many hated the disordered and disorderly city of Bogotá, he wore a Superman costume and acted as a superhero called “Supercitizen.” People laughed at Mockus’ antics, but the laughter began to break the ice of their extreme skepticism.
I think I’d heard about Mockus before on an episode of From Our Own Correspondent, but it’s good to read more about his exploits, and that he seems to be genuinely popular with the citizens of Bogotá even after his term has ended.
via Charlotte Bouckaert.
HyperRogue II – a roguelike on the hyperbolic plane
I was directed to this game by a retweet by @haggismaths. It’s a roguelike (text-based explorey role-playing adventure game) which takes place on the hyperbolic plane. It’s a lot of fun. It’s hard to get your head round the fact that there’s a lot more stuff in between two lines in hyperbolic space than in Euclidean space, so it’s very hard to find your way back somewhere after it disappears over the horizon.
You can download a windows executable, or source code which will compile on Linux, at http://www.roguetemple.com/z/hyper.php
Conformal Models of Hyperbolic Geometry by Vladimir Bulatov
Vladimir Bulatov makes art, including metal sculptures and jewellery, based on tilings of non-Euclidean spaces.
He has posted online some slides he made to go with a talk he gave at the JMM in 2010, about the many ways conformal mappings of the hyperbolic plane can produce interesting images. Quite a few of the diagrams are animated if you click on them, which I missed first time round.
There are a few other slideshows on similar topics on his site.
In addition to all that, Vladimir shares some very cool things on Google+.
Tiles by Claesson Koivisto Rune
Tiles by Claesson Koivisto Rune:
