5-Sided Square – Numberphile

From Numberphile. Check our sponsor The Great Courses Plus (free trial): http://ow.ly/j5cB30hIvm2 This video features Cliff Stoll. More links & stuff in full description below ↓↓↓ More Cliff Stoll videos: http://bit.ly/Cliff_Videos Buy a Klein Bottle from Cliff – it’s an experience: http://www.kleinbottle.com Discuss this video on Brady’s subreddit: https://redd.it/96x6c4 Numberphile is supported by the Mathematical…

Last Cards Match – Numberphile

From Numberphile. Numberphile Playing Cards: http://bit.ly/NumberphileCards More card videos: http://bit.ly/Cards_Shuffling More links & stuff in full description below ↓↓↓ Featuring Tadashi Tokieda, a professor of mathematics at Stanford University. More Tadashi Videos: http://bit.ly/tadashi_vids Discuss this video on Brady’s subreddit: https://redd.it/95llyc Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported…

Balls and Cones – Numberphile

From Numberphile. This is a (stand-alone) continuation of the previous video at: https://youtu.be/2vnqSwWAn34 Featuring Tadashi Tokieda. More links & stuff in full description below ↓↓↓ More Tadashi: http://bit.ly/tadashi_vids Playing cards latest: http://www.bradyharanblog.com/numberphile-playing-cards Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated…

Earthquakes, Circles and Spheres – Numberphile

From Numberphile. Tadashi is back with a discussion of how we know where earthquakes occur. A second video is at: https://youtu.be/lubGnk0UZt0 More links & stuff in full description below ↓↓↓ More Tadashi Tokieda at: http://bit.ly/tadashi_vids Podcasts HELLO INTERNET http://www.hellointernet.fm UNMADE PODCAST https://www.unmade.fm Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are…

21-card trick – Numberphile

From Numberphile. A simple trick with some neat math behind it. More on Numberphile cards at: http://www.bradyharanblog.com/numberphile-playing-cards More links & stuff in full description below ↓↓↓ More cards video: http://bit.ly/Cards_Shuffling This video features Anastasia Chavez: http://anastasiachavez.academia.edu/cv We did a similar video to this about six years ago with Matt Parker (and 27 cards): https://youtu.be/l7lP9y7Bb5g Numberphile…

How to make a Klein Bottle from an old pair of jeans – Numberphile

From Numberphile. More Klein bottle videos: http://bit.ly/KleinBottles More links & stuff in full description below ↓↓↓ Visit Cliff Stoll’s online store: http://www.kleinbottle.com/ More Cliff videos: http://bit.ly/Cliff_Videos Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process…

The Six Triperfect Numbers – Numberphile

From Numberphile. Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ This video features Dr James Grime – http://singingbanana.com Catch James in a recent Objectivity video with Brady: https://youtu.be/B4gzt8v401Q More James Grime videos on Numberphile: http://bit.ly/grimevideos More videos on Perfect Numbers: http://bit.ly/PerfectNumbers Triperfect…

Floating Balls and Lift – Numberphile

From Numberphile. Tadashi discusses pressure and lift… with a toy of course! More links & stuff in full description below ↓↓↓ Lift and wings on Sixty Symbols: https://youtu.be/PF22LM8AbII Tadashi Playlist: http://bit.ly/tadashi_vids You can buy version of this toy on Amazon: https://amzn.to/2MLfpSC (affiliate link) Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We…

The Slightly Spooky Recamán Sequence – Numberphile

From Numberphile. Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor)… More links & stuff in full description below ↓↓↓ Check out Brilliant’s Problem of the Week (it’s free): https://brilliant.org/NumberphilePOTW/ Alex Bellos: http://www.alexbellos.com/ The coloring book featuring the Recamán Sequence: https://amzn.to/2t7CWE5 More videos with Alex: http://bit.ly/Bellos_Playlist The Recamán Sequence on the OEIS:…

g-conjecture – Numberphile

From Numberphile. Discussing h-vectors and the g-conjecture. Featuring June Huh from the Institute for Advanced Study at Princeton University. More links & stuff in full description below ↓↓↓ A little extra bit from this interview: https://youtu.be/cFKGX3vAs_Q Shapes in higher dimensions: https://youtu.be/2s4TqVAbfz4 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also…

The Problem with 7825 – Numberphile

From Numberphile. Signup for your free trial to The Great Courses Plus here: http://ow.ly/b5wA30hIviV (sponsor) More links & stuff in full description below ↓↓↓ James Grime on a proof involving Pythagorean Triples. James Grime: http://singingbanana.com (book him for a talk) More on the proof: https://www.cs.utexas.edu/~marijn/ptn/ Preprint of the paper: https://arxiv.org/abs/1605.00723 Ron Graham videos: http://bit.ly/Ron_Graham Numberphile…

The Silver Ratio – Numberphile

From Numberphile. The silver ratio (and other metals) with Tony Padilla. More links & stuff in full description below ↓↓↓ Golden editions are sold out (for now) but more shirts available at https://teespring.com/stores/numberphile More Tony Padilla videos: http://bit.ly/Padilla_Numberphile Tony’s Twitter: https://twitter.com/DrTonyPadilla Golden Ratio playlist: http://bit.ly/Golden_Ratio Numberphile is supported by the Mathematical Sciences Research Institute (MSRI):…