The Revolving Century puzzle is a beautifully made wooden puzzle from Creative Crafthouse in Hudson, Florida.... 더 읽어보기 >>

No, this is not the script for an episode of "Game of Thrones". It is a blog post about Lindenmayer grammars, growing plants, space-filling fractals, turtle graphics and dragon curves.... 더 읽어보기 >>

Two years ago, in March of 2023, an unlikely team of mathematical hobbyists announced the discovery of a remarkable 13-sided polygon that they nick-named the "Hat". Today, a Google search for the Hat's more formal name, "Aperiodic Monotile", yields dozens of links.... 더 읽어보기 >>

A look at the structure, and the eigenvalues and singular values of interesting test matrices.... 더 읽어보기 >>

LUTool provides an interactive animation of Gaussian elimination, the most important algorithm in technical computing.... 더 읽어보기 >>

Two previous blog posts, Dec. 12, 2024 and Nov. 16, 2024, introduced "Sonic", my new tool for incorporating sound in videos. Today's blog post includes a link to the MATLAB source code for Sonic, as well as links to new versions of ten examples.... 더 읽어보기 >>

I introduced Sonic in my blog post last month. Today I will use Sonic to add sound to the graphics from three old posts, the vibrating L-shaped membrane, the Recamán sequence and the chaotic behavior of the Swinging Sticks.... 더 읽어보기 >>

I am very excited to incorporate sound in animations. This blog post has five examples with links to videos enclosed in '+ + + +'.... 더 읽어보기 >>

Recently, I have made a series of blog posts about Redheffer matrices and the Mertens conjecture. After each of the posts, readers and colleagues offered suggestions to speed up the calculations. Here is a summary of what I have learned.... 더 읽어보기 >>

The graphics in my post about R^2 were produced by an updated version of a sixty-year old program involving the U.S. census. Originally, the program was based on census data from 1900 to 1960 and sought to predict the population in 1970. The software back then was written in Fortran, the predominate technical programming language a half century ago. I have updated the MATLAB version of the program so that it now uses census data from 1900 to 2020.... 더 읽어보기 >>