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Mike Zabrocki
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The pictures are of a brass A_4 permutahedron. It was designed by my student Zhiheng Zeng (+Z Zeng) and printed out at +Shapeways . The object is small. It is only about 2 inches across.
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8/6/15
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Here is a partial A3 hyperplane arrangement intersected with a sphere and projected on to the plane...and then turned into a necklace. It is another 3D printing project that I made at Shapeways out of stainless steel.
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I passed a guy that was holding a sign "Bad advice $1. Under no circumstance should you follow this advice." I felt in need of such a service and so paid my loonie (that's right, with the U.S./Canada Exchange rate right now, this is a fantastic deal of around 80 cents US). He asked me if I wanted advice about a specific topic or generic advice. I chose generic and he said "you should hit on Mike Tyson. He's in town now you know." (for the TIFF I imagine). I think that's advice that everyone shouldn't follow.

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Here is the outcome of my latest 3d printing project (this should partly explain why I geek out over +Christopher Hanusa 's class going to see the +Shapeways factory). I started with 4+ prototypes before I started getting the right size. It is "printed" in polished silver. I believe they first print it in wax and then cast a mold in plaster before making the silver version.
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5/20/15
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This is a 3d model produced by one of my students (Zhiheng Zeng +Z Zeng) that was printed from +Shapeways.  It is the F4 permutahedron projected from 4d into 3d.  It has 1152 vertices.  Each vertex has 4 edges and is adjacent to 3 squares, 2 hexagons and 1 octagon (because the Dynkin diagram is --==-- ).  These are closeups so you can't really tell, but the white object is smaller than the red.
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2015-04-30
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Lee Lorch of York University died yesterday at the age of 98.  He was impressive because he made a difference in the lives of others by taking a moral stand against racial injustice at the risk of his own life and well being.

The New York Times (goo.gl/fypgZ5) covered his attempt to integrate a segregated community a few years ago.

His wikipedia page (goo.gl/rEaKU1) mentions some of the other times that he made a difference.

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When I went to my parents house at Christmas I found a couple of old Magic Eye books and I took them back to Toronto with me.  I always wondered what an animated version of this technology would look like.  I like the song too.

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Speaking from experience, nobody wants a mathematician as an uncle either.
http://www.smbc-comics.com
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