Today we celebrate the second Permutation Day of the year! I call days like today permutation days because the digits of the day and the month can be rearranged to form the year.
Additionally, today is a transposition day, as a single swap of two digits is all that’s need to turn the day-month into the year.
Celebrate Permutation Day by mixing things up! Try doing things in a different order today. Just remember, for some operations, order definitely matters!
It took several hundred encounters with this park bench before I realized it was a heptagon! I don’t see many regular, seven-sided figures in my experience, which made this a surprising discovery. I wonder what prompted this design choice.
Like most real-world instances of perfect geometric objects, it doesn’t exactly measure up. But what’s a few degrees between n-gons?
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.
Celebrate Permutation Day by mixing things up! Try doing things in a different order today. Just remember, for some operations, order definitely matters!
While cleaning up after a successful group build, a colleague and some students had fun making a little Thanksgiving tribute in Zometool.
I can’t look at this lovely jellyfish without seeing a four-petal rose curve in the polar plane.
