From Numberphile.
Featuring Sophie Maclean and Ayliean MacDonald. Extended crochet video at https://www.patreon.com/posts/116050981 — More links & stuff in full description below ↓↓↓
More knot videos: https://www.youtube.com/playlist?list=PLt5AfwLFPxWLyfD4nhZCX_3UZdSSpkBTs
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Sophie is based at Kings College, London: https://sophiethemathmo.wordpress.com
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