Scientific American Content | Global Follow How a 99-year-old mathematician unraveled a century-old braid mystery Joan Birman popularized the Burau representation problem decades ago. Now she and two colleagues have a proof that reveals brand new insights into the geometry of braids https://www.scientificamerican.com/article/how-a-99-year-old-mathematician-unraveled-a-century-old-braid-mystery/ scientificamerican.com