Here is a conversation I've had with Daniel Ruberman, Professor of Mathematics. Daniel's website: https://people.brandeis.edu/~ruberman/Find Back to the Stone Age on:YouTube: https://youtube.com/playlist?list=PLZrhMJ5eusE_ACw6Ec3TqCbvDVZ6HP809&si=WhVnrLLAUuYW-AnySpotify: https://open.spotify.com/show/3pT8MUeR8bskcsuu8gmUGKApple Podcast: https://podcasts.apple.com/us/podcast/back-to-the-stone-age/id1741219288Outline00:16 - Is math invented or discovered?05:30 - Mathematics and the physical world28:02 - Topology38:00 - Manifolds and smooth manifolds52:31 - Higher dimensions and low-dimensional topology01:04:39 - Intuition about 4th dimension01:24:01 - Gauge theories01:38:02 - Knots and manifolds01:44:33 - Applications of knot theory and topology01:50:28 - Infinity01:56:38 - Final thoughtsEnjoy Back to the Stone Age!

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