Amazing paper. The depth, the creativity, and making it rigorous to connect these ways of counting shapes into solving polynomials, but still also a sense that it's not the final answer, that it's characterizing some fundamental patterns, but it's also a step on the way to more understanding. Really cool. One of the authors also has a YouTube channel: <a href="https://www.youtube.com/channel/UCXl0Zbk8_rvjyLwAR-Xh9pQ" rel="nofollow">https://www.youtube.com/channel/UCXl0Zbk8_rvjyLwAR-Xh9pQ</a><p>Also the same author has a blog, with a post about this paper: <a href="https://njwildberger.com/" rel="nofollow">https://njwildberger.com/</a> - blog also notes he's about to retire, too! Wow