Arithmetic dynamics | Base-dependent integer sequences | Fibonacci numbers | Recurrence relations
In number theory, a Keith number or repfigit number (short for repetitive Fibonacci-like digit) is a natural number in a given number base with digits such that when a sequence is created such that the first terms are the digits of and each subsequent term is the sum of the previous terms, is part of the sequence. Keith numbers were introduced by Mike Keith in 1987.They are computationally very challenging to find, with only about 100 known. (Wikipedia).
Bid for this paper on ebay: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=221156224355 Professor Copeland on Keith numbers, clusters and "reverse Keiths". More links & stuff in full description below ↓↓↓ And before commenting on the merits of "recreational maths" - hear what Ed say
From playlist Ed Copeland on Numberphile
What is Graham's Number? (feat Ron Graham)
Ron Graham explains the number which takes his name... See our other Graham's Number videos: http://bit.ly/G_Number More Ron Graham Videos: http://bit.ly/Ron_Graham More links & stuff in full description below ↓↓↓ Graham's Number (Numberphile T-Shirt): http://bit.ly/Grahams_T-Shirt See hi
From playlist Big Numbers on Numberphile
See our other Graham's Number videos: http://bit.ly/G_Number A number so epic it will collapse your brain into a black hole! Yet Tony Padilla and Matt Parker take the risk of discussing its magnitude. Watch with caution. More links & stuff in full description below ↓↓↓ See also our video
From playlist Matt Parker (standupmaths) on Numberphile
Graham's Number Escalates Quickly - Numberphile
See our other Graham's Number videos: http://bit.ly/G_Number More Ron Graham Videos: http://bit.ly/Ron_Graham More links & stuff in full description below ↓↓↓ Note from Brady: In a previous video I "under explained" the true magnitude of Graham's Number. This is because my brain is small.
From playlist Big Numbers on Numberphile
5040 and other Anti-Prime Numbers - Numberphile
Audible: http://www.audible.com/numberphile (free trial) Dr James Grime discusses highly composite numbers. More links & stuff in full description below ↓↓↓ Continues and extra footage: https://youtu.be/PF2GtiApF3E Prime numbers (more videos): http://bit.ly/primevids http://www.antiprim
From playlist Prime Numbers on Numberphile
Something special about 399 (and 2015) - Numberphile
It is the lowest Lucas-Carmichael Number... Featuring Ed Copeland. More links & stuff in full description below ↓↓↓ More about Ed's real work: http://bit.ly/CopelandGoesLong With thanks to these Patreon supporters: Herschal Sanders (from Susan) Today I Found Out Lê OK Merli Alex Bozzi
From playlist Ed Copeland on Numberphile
8128 and Perfect Numbers - Numberphile
For many years, 8128 was the largest known perfect number. But what is a perfect number? More links & stuff in full description below ↓↓↓ This video features Dr James Grime. James' own YouTube channel full of maths stuff can be found at http://www.youtube.com/singingbanana NUMBERPHILE We
From playlist James Grime on Numberphile
Numberphile is also on Facebook: http://www.facebook.com/numberphile More links & stuff in full description below ↓↓↓ 142857 is the most "famous" of the intriguing cyclic numbers. Featuring Dr Tony Padilla from the University of Nottingham - https://twitter.com/DrTonyPadilla NUMBERPHILE
From playlist Tony Padilla on Numberphile
Just a quick nugget about the number 37. More links & stuff in full description below ↓↓↓ This video features Matt Parker. His website is http://standupmaths.com/ - He also works at Queen Mary, University of London. NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Faceboo
From playlist Matt Parker (standupmaths) on Numberphile
Various seals - including some very important ones - are stored at the Royal Society. Keith and Brady investigate. RELATED EPSIODES: Kings and Queens - https://youtu.be/y2ZdB-65TqA Royal Mace - https://youtu.be/1OgmOTrKNdE Fan Books (inc Newton) - https://youtu.be/mjvUhu0iiUI Subscribe to
From playlist Object Unboxing on Objectivity
Detective Speaks To The Dead | The Psychic Detective (Paranormal Documentary) | Real Stories
Detective Speaks To The Dead | The Psychic Detective (Paranormal Documentary) | Real Stories Keith Charles spent 30 years as a British police officer. But he was a copper like no other. Want to watch more full-length Documentaries? Click here: http://bit.ly/1GOzpIu Follow us on Twitter
From playlist 100 Documentaries to Take Your Mind Off of Things
2.11.5 Optimal Stable Matching: Video
MIT 6.042J Mathematics for Computer Science, Spring 2015 View the complete course: http://ocw.mit.edu/6-042JS15 Instructor: Albert R. Meyer License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 6.042J Mathematics for Computer Science, Spring 2015
The Big Summer Science Quiz 2021 | The Royal Society
Join host Helen Arney, Professor Brian Cox, Dr Kevin Fong and more for our second Big Summer Science Quiz! Our big, family-friendly online quiz returns for its second year. Get your team together and go for quiz glory, as comedian and science presenter Helen Arney is joined by special gue
From playlist Summer Science 2021 on demand
Sal Khan (with a severe cold!) on Future Talk
Salman Khan (with a severe cold!) on Future Talk
From playlist Khan Academy-Related Talks and Interviews
Keith Wears the White Gloves of Destiny - Objectivity 173
Royal Society Head Librarian Keith Moore dons the white gloves and takes a lucky dip into the card catalogue. More links below ↓↓↓ Featuring Keith Moore from The Royal Society speaking with Brady. Objectivity on Patreon: https://www.patreon.com/objectivity Check out our White Gloves of
From playlist White Gloves of Destiny on Objectivity
The Royal Society's next Summer Science Exhibition is next week - it's free: http://bit.ly/SummerScience_RS In 1896 the society hosted an exhibition showcasing early X-ray technology. Brady and Keith investigate. Films by James Hennessy and Brady Haran Light Bulbs: https://youtu.be/24pXd
From playlist Objectivity
White Gloves of Destiny - Objectivity 28
Brady lets the White Gloves of Destiny decide this weeks object as he takes a lucky dip out of the card catalogue at The Royal Society. Follow us on Facebook at https://www.facebook.com/ObjectivityV... And Twitter at https://twitter.com/objectivity_vid Royal Society: http://bit.ly/Royal_
From playlist White Gloves of Destiny on Objectivity
Covering an old classic: Leveling a lathe so it turns concentric parts. Special guest Keith Fenner! I've over simplified in few areas -- my intention is to convey / shed light on the general mechanics while still making a watchable video about an otherwise (probably) dry topic. Dale Derr
From playlist All Uploads
4937775 is a Smith Number - as are 27, 666 and infinite others! More links & stuff in full description below ↓↓↓ Smith Numbers were first discovered in a phone book, explains Professor Ed Copeland from the University of Nottingham. Ed Tweets: https://twitter.com/ProfEdCopeland NUMBERPHIL
From playlist Numberphile Videos