@LawrieCape, interactive developer from Leeds, did interactive and animated versions of 12 of my Geometry Daily graphics. So awesome!
Kyle Zimmer’s NinjaStar fractal gets more and more interesting. The number of triangles in each generation is not a sequence in the online encyclopedia of integer sequences. (oeis.org). It’s a neat exponential pattern that has hints of Pascal’s Triangle and the Fibonacci generation -skipping properties. Even the envelope looks like an interesting fractal!
Fun, fun, fun.
also @jensilvermath on twitter. These are great!
Pizza Price Per Inch^2
NPR’s Planet Money did quite an extensive survey of pizza price per size. What function best fits the resulting graph? Why?
The graph on the Planet Money site is interactive, and has factoids like: “One 16-inch pizza has roughly the same area as 1.3 14-inch pizzas or 4 8-inch pizzas.
Edwin Alabone’s Cycloids
Couldn’t find a lot more information about Poly-Cyclo-Epicycloidal and other Geometric Curves by Edwin W. Alabone. The only copy available I saw was listed for 900 GBP! But it was signed. :-)
Another reference is a Dutch artist who is fascinated by the art in the book. The bottom pictures are from him.
Alabone was a physician who was caught up in controversy over treatment of Tuberculosis, and had quite a sad last few years. May he rest in peace.
Poly-Cyclo-Epicycloidal and other geometric curves by Edwin W. Alabone. London, 1913.
I have the very pleasure to own a signed copy of this beautiful and rare book.
Another entry for the book lust list.
Science quotation posters, from Luca Ferrario.
Math for fun
Want these badly. Just look at ‘em!