What IS a Number? As Explained by a Mathematician

What IS a Number? As Explained by a Mathematician. Von Neumann, Zermelo, Fraenekl, Sets, Numbers, Cantor. New Puzzles every Sunday. I post math puzzles and their solutions with animations. Subscribe: https://www.youtube.com/@guzmat?sub_c... If you prefer you can watch the videos in 🇪🇸 Spanish:    / @guzmat-espanol   🇮🇹 Italian:    / @guzmat-quesiti   English:    / @guzmat   Music: Jul by Scott Buckley | www.scottbuckley.com.au Music promoted by https://www.chosic.com/free-music/all/ Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/... 🌟My Links🌟 Personal Website: http://www.guzman.it Personal Blog: https://guzman-tierno.blogspot.com/ Instagram:   / guzmatpuzzles