#recreationalmaths — Public Fediverse posts

My first attempt at a #DiscreteDynamicalSystem Take a number, n If (n-1) is prime then map n -> n^2 If (n-1) is composite then map n-> Aliquot sum of (n-1) Numbers 1-19 all end in a cycle. I am not sure about 20. eg. 6 -> 36 -> 13 -> 16 -> 9 -> 7 -> 6. #mathsky #recreationalmaths #mathsart

New oeis.org/A393283 just dropped. Take a triangular array starting (0),(1,0) Now draw a ray from the tip down to the next term. Each new term is the sum of terms on or adjacent to this ray. 0 1,0 1,1,0 2,3,2,0 Try this in mod 2 for a #cellularautomata. #mathsky #sequences #recreationalmaths

A393283 - OEIS

Continuing the series of videos of #G4G15 :

Sabetta Matsumoto:
Bending Seams - How to Create Couture Curves

https://www.youtube.com/watch?v=vMa6RIi42L4

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)
Please share!

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Continuing the series of videos of #G4G15 :

Bjoern Muetzel - Apollonian Dream

https://www.youtube.com/watch?v=m9PNxh3cEwE

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Continuing the series of videos of #G4G15 :

Spandan Bandyopadhyay:
The Egg Sandwich Problem

https://www.youtube.com/watch?v=vLUBX3q38oQ

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Continuing the series of videos of #G4G15 :

George Hart, Abraham Sharp and the "Sharpohedron"

https://www.youtube.com/watch?v=0K_0vMrZBjc

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Continuing the series of videos of #G4G15 :

Tanya Khovanova: My Favorite Math Jokes

https://www.youtube.com/watch?v=zNQLCR0yz2A

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

We continue the series of videos of #G4G15 :

Robin Houston:
Polyhedra Whose Faces Meet at Right-Angles Except on One Edge

https://www.youtube.com/watch?v=eru0lAuqLzU

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

It's Maths Week England !!!!

https://mathsweekengland.co.uk/

#MWE2024 #MWE24 #MathsToday #MathsChat #MathsEd

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Continuing the series of videos of #G4G15 :

Scott Vorthmann: The Virtual Fifty-Nine Icosahedra

https://www.youtube.com/watch?v=NP4PN1tgGvU

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

We continue the series of videos of #G4G15 :

This is quite simply astonishing:

Bob Hearn:
The Magnetic Fifty-Nine Icosahedra

https://www.youtube.com/watch?v=pxsT-uavzug&list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x&index=2

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

We continue the series of videos of #G4G15 :

Greg Whitehead:
Nerd Sniped by the Hat Tile

https://www.youtube.com/watch?v=paYj4hEIsxk

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

We continue the series of videos of #G4G15 :

Amina Buhler-Allen:
Hyperspace Heroes 1: Odd Bedfellows

https://www.youtube.com/watch?v=7Hc9cHwtcQc

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Chaim Goodman-Strauss:
The Hat Aperiodic Monotile

https://www.youtube.com/watch?v=PZw2lFws5oo

Video from #G4G15 ... there's some gorgeous stuff here.

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Eric Bates: Passing the Spark

Why do some people seem so natural on camera, while the rest of us feel awkward and inarticulate? This talk delves into the art of speaking to a camera and sharing your skills online...

https://www.youtube.com/watch?v=RWgs7bcpcJI

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Video from #G4G15 :

John Winston Garth: Cellular Auto-mon

https://www.youtube.com/watch?v=b_VR33eICoc

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Video from #G4G15 :

Carolyn Yackel:
Depicting Catalan Solids on Temari Balls

https://www.youtube.com/watch?v=FQLdstg4Tiw

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Video from #G4G15 :

Roy Leban:

Markov Algorithms and Life
https://www.youtube.com/watch?v=ieQdpBgt4DU

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Video from #G4G15 :

Tom Rokicki:

The Speed of Light in the Game of Life

https://www.youtube.com/watch?v=AWDCNCszn-U

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Video from #G4G15 :

David Michael Greene:
How Many Gliders Do You Really Need?

https://www.youtube.com/watch?v=W9ZR_4u38a4

Soon to be on the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Another video from #G4G15 :

Alvy Ray Smith:
What Do the Theory of Computing and the Movies have in Common?

https://www.youtube.com/watch?v=CbXlg3GeIbQ

From the playlist:

https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:

https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Another video from #G4G15 :

Jorge Nuno Silva:
Lewis Carroll's Game of Logic
https://www.youtube.com/watch?v=n6HZe4SIR60

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Next video from #G4G15 :

Audrey Nasar:
Symmetry Card Game
https://www.youtube.com/watch?v=mWjUQKoO-OU

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Next video from #G4G15 :

Jim Propp:
Industrious Dice, or, Pip-Pip Hooray!
https://www.youtube.com/watch?v=dLFr1SqvkQQ

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Next video from #G4G15 :

Jeanette Shakalli:
FUNDAPROMAT: A Free Source for Math Enthusiasts
https://www.youtube.com/watch?v=pRS-iqJ1-1o

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Another video from #G4G15 :

John Harris:
Puzzle Variations from a Rod Bentley Text
https://www.youtube.com/watch?v=pRDIOLdQJvE

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Next video from #G4G15 :

Bill Cheswick:
Paul Erdos' Brain was in Town
https://www.youtube.com/watch?v=XvzAQdjQ4d0

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Next video from #G4G15 :

Eleftherios Pavlides:
Polymorphic Elastegrity (PE): From Recreational Paper Folding to the Tree of Polymorphisms
https://www.youtube.com/watch?v=qnP6jRtGLyY

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Video from #G4G15 :

Robert Pope Vermillion: The Impossible 3000.1
https://www.youtube.com/watch?v=Dds2gFpWv8w

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Inna Zakharevich:
Computing with Paper

https://www.youtube.com/watch?v=G3XU1PSwVRw

A video from #G4G15

From the playlist:
https://www.youtube.com/playlist?list=PL5_D5QQxvWKUPpMY3eNV-PrIzh1uHlR8x

All part of the #G4G series of videos:
https://www.youtube.com/@G4GCelebration/playlists

Boosts welcome (if content to do so)

#RecreationalMaths #RecMaths
#RecreationalMath #RecMath
#MTBoS #MathEd #MathEdChat

Shower thought: idly wondering about placing mutually attracting points on a 2D sphere in a stable configuration.

Turns out this was solved by none else than John #Leech:

https://sci-hub.se/https://www.jstor.org/stable/pdf/3610579.pdf?ab_segments=

#recreationalMaths

The #Distance Between #Numbers - #Numberphile

https://www.youtube.com/watch?v=Sgupo9DLMGs&ab_channel=Numberphile

#Math #Maths #Mathematics #Numbers #2Adic #2AdicMetric #RationalNumbers #RealNumbers #Limit #Infinity #Converge #Convergence #Diverge #Divergence #RecreationalMaths #RecreationalMathematics #Axiom #Axioms #Axiomatic

@ColinTheMathmo @VisualStuart Sorry for the poor quality of introduction - I was on my phone (my laptop, I'm still recovering from a ransomware).
Summarising:
I met Colin at college, where he corrected many of my initial bad juggling habits, and introduced me to the (then, very new!) concept that became known as #Siteswap. I keep up with him for the #recreationalmaths , the #MathsJam events, and other reminders that I used to be, and still am, interested in that space.
Stuart, on the other hand, is someone who seems to show up in random unconnected places - we were both Microsoft MVPs at various times, and with the #PortlandJuggling Festival being the most local, reliable annual juggling festival, I've run into him a few times there. For the first couple of years, there was definitely a vibe of "I've seen you before, but I can't remember where".
There is likely to be a #SeattleJuggling event in the next year.
Hopefully that's enough hashtags.