I can’t look at this lovely jellyfish without seeing a four-petal rose curve in the polar plane.
Appreciation Numbers
10/24/2014 — Happy Permutation Day!
Today we celebrate another Permutation Day! I call days like today permutation days because the digits of the day and month can be rearranged to form the year.
This is the fourth permutation day of of 2014, and there’s one more on its way.
Celebrate Permutation Day by mixing things up! Try doing things in a different order today. Just remember, for some operations, order definitely matters!
Appreciation Photography
Math Photo: Manhole Math Art
Ever since I noticed this pothole pentagon, I’ve been looking down a lot more.
The lovely mathematical designs on this this manhole cover immediately put me in mind of the labyrinths of Robert Bosch. And then later I realized this work resembled another piece from a Bridges artist: Tim Locke’s Starburst.
Appreciation Challenge
A Sidewalk Paradox
A serendipitous sidewalk sign, given a recent unit on mathematical logic.
So, what’s the truth value of this statement?