Ryan
Member 
Calgary, Alberta, Canada
Posts: 2,720 
What I collect: If I have a catalogue for it, I collect it. And I have many catalogues ....
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Post by Ryan on Jan 14, 2015 18:55:50 GMT
The Guardian newspaper has a columnist who writes math-related articles, and one of his recent efforts was an article about a stamp series from Macau. Have a look at the article here - it's a nice-looking series. And hooray for turtles & tortoises, also.  Ryan |
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BC
Departed
Rest in Peace
Vancouver, BC Canada
Posts: 836
What I collect: Worldwide USED up to the 1960's, later years from countries that came into existence after then, like Anguilla, Tuvalu and Transnistria.
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Post by BC on Jan 14, 2015 20:38:56 GMT
Wonderful article Ryan, thanks for sharing it. I collect turtle/tortoises on stamps - and and like math  |
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Ryan
Member
Calgary, Alberta, Canada
Posts: 2,720
What I collect: If I have a catalogue for it, I collect it. And I have many catalogues ....
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Post by Ryan on Jan 14, 2015 22:25:40 GMT
Here's another one from Macau. I either posted this one before or I didn't (one of the two, can't remember - haha). This one shows a Mandelbrot set fractal (and a Julia set too, on the stamp itself). For real mathematicians, the black bit is the interesting part. For the rest of us, it's the coloured stuff.  And here's one more - I'm sure I've posted it before, but I might as well do so again because it belongs in a thread about math. Curta mechanical calculators were fantastic pieces of machinery built in Liechtenstein, designed by an inmate in a Nazi concentration camp. Liechtenstein issued a stamp featuring the calculator in 2006. I own one in excellent refurbished condition and I paid more for it than I've ever paid for a stamp, I think. Yeesh.  Ryan |
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rod222
Member
Posts: 9,877
What I collect: Worldwide Stamps, Ephemera and Catalogues
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Post by rod222 on Jan 14, 2015 23:32:38 GMT
Here's another one from Macau. I either posted this one before or I didn't (one of the two, can't remember - haha). This one shows a Mandelbrot set fractal (and a Julia set too, on the stamp itself). For real mathematicians, the black bit is the interesting part. For the rest of us, it's the coloured stuff. Serendipity arrives again. Last evening watched a documentary I taped some time ago. "The Code" is a mathematics-based documentary for BBC Two presented by Marcus du Sautoy, beginning on 27 July 2011. Each episode covers a different branch of mathematics. As well as being a documentary, The Code is also a series of online challenges forming a treasure hunt, with clues to finding the treasure being included in the episodes, online games and other challenges. The mandelbrot was discussed, that was the genesis of Computer "rendering" that began the way we see and fly around realistic mountains and geography in computer games Why the Bee constructs the hexagon, why the "Giant's causeway" in Ireland cracked in hexagon shapes. |
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rod222
Member
Posts: 9,877
What I collect: Worldwide Stamps, Ephemera and Catalogues
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Post by rod222 on Jan 14, 2015 23:45:21 GMT
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rod222
Member
Posts: 9,877
What I collect: Worldwide Stamps, Ephemera and Catalogues
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Post by rod222 on Jan 14, 2015 23:57:29 GMT
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Ryan
Member
Calgary, Alberta, Canada
Posts: 2,720
What I collect: If I have a catalogue for it, I collect it. And I have many catalogues ....
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Post by Ryan on Jan 15, 2015 3:54:56 GMT
Last evening watched a documentary I taped some time ago. "The Code" is a mathematics-based documentary for BBC Two presented by Marcus du Sautoy, beginning on 27 July 2011. Each episode covers a different branch of mathematics. As well as being a documentary, The Code is also a series of online challenges forming a treasure hunt, with clues to finding the treasure being included in the episodes, online games and other challenges. I have that set in my DVD library - I saw the series once and was quite impressed with Mr. du Sautoy's style. I should dig it out and have a look at it again, brush up on my base 60 math. Etruscans? Sumerians? Can't remember exactly ... whoever it was, they were the genesis of our "60 seconds to a minute, 60 minutes to an hour" way of counting. Ryan |
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rod222
Member
Posts: 9,877
What I collect: Worldwide Stamps, Ephemera and Catalogues
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Post by rod222 on Jan 15, 2015 5:08:24 GMT
Etruscans were the marvelous artists, the forerunners of the Roman Empire.
Love everything about the Etruscans.
My bet would be the Sumerians.
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rod222
Member
Posts: 9,877
What I collect: Worldwide Stamps, Ephemera and Catalogues
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Post by rod222 on Jan 15, 2015 5:21:44 GMT
I collect turtle/tortoises on stamps - So, Brian, why havn't we seen a topical thread ?  "Spot the Turtle"  |
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KirkS
Member
Often wrong, but never in doubt :-)
Posts: 187
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Post by KirkS on Jan 15, 2015 18:04:40 GMT
I love magic squares. When I taught programming, I would make my students write code to create magic squares -- a great way to make sure they understand two-dimensional arrays.
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Ryan
Member
Calgary, Alberta, Canada
Posts: 2,720
What I collect: If I have a catalogue for it, I collect it. And I have many catalogues ....
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Post by Ryan on Jan 19, 2015 17:11:26 GMT
Here's another fractal on a stamp, this time from Israel.  Ryan |
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