https://tube.mathe.social/videos/watch/ca6c416d-3388-4bec-ae84-ae8b1ae925f4 A knotholder trick as introduced in the paper: All knots are trivial: a "proof" by sleight of hand, by Raphael Appenzeller and José Pedro Quintanilha, https://arxiv.org/abs/2604.13799 Filmed at the Heidelberg Experimental Geometry Lab HEGL. Mon, 20 Apr 2026 08:10:32 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.mathe.social https://tube.mathe.social/lazy-static/avatars/835aa916-8528-45ea-9860-90f16ebddaa0.png https://tube.mathe.social/videos/watch/ca6c416d-3388-4bec-ae84-ae8b1ae925f4 All rights reserved, unless otherwise specified in the terms specified at https://tube.mathe.social/about and potential licenses granted by each content's rightholder.