Mike Croucher has written a post about the next incarnation of the Carnival of Maths, which we are coordinating.
You're reading: Columns
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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
Reviving the Carnival of Mathematics
Those keeping score may have noticed there hasn’t been a new Carnival of Mathematics for a while. I’ve agreed to take a small part in running it from now on with Katie Steckles and Christian Perfect, as part of a secret new project we’re plotting. To get the ball rolling again, I’ve volunteered to host a new Carnival.
What is the Carnival of Mathematics? It’s a monthly (ish) mathematical blogging roundup. Here’s a description:
The Carnival of Mathematics accepts any mathematics-related blog posts: explanations of serious mathematics, puzzles, writing about mathematics education, mathematical anecdotes, refutations of bad mathematics, applications, reviews, etc. Sufficiently mathematized portions of other disciplines are also acceptable.
The previous Carnival of Mathematics was number 84, posted at Mathematics and Multimedia in December. So this is an announcement that the Carnival of Mathematics 85 will be hosted here on Travels in a Mathematical World in April. Please get your posts in by 2nd April. To submit articles, Katie has made a form which you should find embedded below or on the Carnival of Mathematics submission form.
You may recommend a post from your blog or a favourite you have read elsewhere. It’s helpful if you would put something in the comments box about the post and why you submitted it.
You can help by blogging, tweeting, etc. a link to this page or the submission form. Thank you!
Update (21/03/2012): Just to note that Mike Croucher, previous curator of the Carnival, has posted a blog post about the new arrangements: Carnival of Mathematics – The Next Generation.
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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
Puzzlebomb – March 2012
Puzzlebomb is a monthly puzzle compendium. Issue 3 of Puzzlebomb, for March 2012, can be found here:
Puzzlebomb – Issue 3 – March 2012
The solutions to Issue 3 can be found here:
Puzzlebomb – Issue 3 – March 2012 – Solutions
Previous issues of Puzzlebomb, and their solutions, can be found here.
Happy π day
People celebrate today as “π day“, an official designation in the US*
3.141592653589793238462643383279502
88419716939937510582097494459230781
64062862089986280348253421170679821
48086513282306647093844609550582231
72535940812848111745028410270193852
110555964462294895493038196...5...
Do you know how we know those digits? If you’d like to find out, I’ve written a blog post over at Second-Rate Minds: “How to calculate π“.
* This is not necessarily the best day. “3.14” is a very crude approximation for π and translating 14th March into this number requires a month/day dating system. 22/7 gives 22nd July in day/month format and gives a slightly closer approximation for π: 3.142857… (3.14 is π-0.00159…, while 22/7 is π+0.00126…). Having said that, 14th March has the tantalising prospect of 1:59 and 2.65359… seconds giving an actual value of π… Perhaps we need a fourteenth month…
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+.