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Showing posts from August, 2015

Sarah Nemec-Nelson and I went from 2 cars to 1 almost 10 years ago, and it is has been a positive life change.

Sarah Nemec-Nelson and I went from 2 cars to 1 almost 10 years ago, and it is has been a positive life change.  Oh how I would like to continue and go to 0 (so difficult in Texas, though Austin downtown has improved in the last decade).  

This is an excellent essay on what we give up by being so car-centric.

Originally shared by Antonia Malchik

I imagine there are a lot of walkers in this network. Access to walking has ramifications for our health and sense of humanity. It's integral to our evolution. Yet we're losing it, especially in poorer areas of the country. "The End of Walking," a piece I wrote for Aeon.
http://aeon.co/magazine/society/step-by-step-americans-are-sacrificing-the-right-to-walk/

Kelly Delp, Saul Schleimer, Laura Taalman and I are organizing a workshop at ICERM next summer, on illustrating...

Originally shared by Henry Segerman

Kelly Delp, Saul Schleimer, Laura Taalman and I are organizing a workshop at ICERM next summer, on illustrating mathematics with various digital media. Researchers and practitioners will share their expertise, both in mathematics and with procedural tools used to illustrate mathematics.
http://icerm.brown.edu/topical_workshops/tw16-1-im/

The first link takes you to nice writeup of Bridges conference highlights by Annette Emerson.

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The first link takes you to nice writeup of Bridges conference highlights by Annette Emerson.

Originally shared by American Mathematical Society

Bridges 2015: a gathering of mathematicians, artists, educators, musicians, poets, computer scientists, sculptors, dancers, weavers and model builders from around the world. John H. Conway and Ingrid Daubechies gave plenary talks, and there were sessions, workshops, art exhibition, performances, Family Day, and exhibits. Whether you were there or not, see highlights of this wonderful conference on mathematics connections in art, music, and science at http://bit.ly/1UB13BL, and see works by some of the participants on Mathematical Imagery at http://bit.ly/1UB15JW.

After 30 years since the last was found, a new convex pentagonal tiling is discovered!

After 30 years since the last was found, a new convex pentagonal tiling is discovered!

Originally shared by David Eppstein

A complete description of the convex pentagons that tile the plane is still unknown (see https://en.wikipedia.org/wiki/Pentagon_tiling). It caused a sensation in the mid-1970s when housewife Marjorie Rice, inspired by Martin Gardner's columns, found several more, and since 1985 the number of known tiling types has stood at 14. But not any more: Casey Mann, Jennifer McLoud, and David von Derau, all of the University of Washington Bothell, have found a 15th type, shown below.

For a brief announcement, including what looks like a screenshot of a brief writeup by the authors (that I can't find directly), see https://twitter.com/gelada/status/626810879435083776
The image below is from http://www.jaapsch.net/tilings/, an applet for manipulating various tilings including these ones.
http://www.jaapsch.net/tilings/images/large/P5-type15.png

It was fantastic to attend the Bridges math-art conference for the first time this year, and to see many of the...

It was fantastic to attend the Bridges math-art conference for the first time this year, and to see many of the talks about these artworks in person. If you'd like to read the papers that go along with them, check out the bridges archive here:

http://archive.bridgesmathart.org

Originally shared by Michael Kleber

Great gallery of pictures from this year's Bridges conference.  Bridges celebrates the connections between math and art.  The art has changed a lot over the last 15+ years, with as much laser cutting and 3D printing as you might expect.  But there is lots of lovely technology-free math art as well.
http://www.theguardian.com/science/alexs-adventures-in-numberland/gallery/2015/jul/30/bridges-2015-a-meeting-of-maths-and-art-in-pictures

This video goes through the proof using the free group F_2 sitting inside SO(3), without mentioning it as such.

This video goes through the proof using the free group F_2 sitting inside SO(3), without mentioning it as such. I hadn't heard of Ian Stewart's Hyperwebster before, but it's a really nice lead-in. Jump to 8:12 if you're happy with Cantor's diagonal argument and Hilbert's hotel and want to skip definitions of countably/uncountably infinite.

#scienceeveryday   #mathematics  
https://youtu.be/s86-Z-CbaHA

Sarah and I are in NYC for the first time, and I'm really enjoying the architecture.

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Sarah and I are in NYC for the first time, and I'm really enjoying the architecture. Here is a building near Bryant park with cones carved out of it. G+ "auto-awesomed" this for me.