#g4g — Public Fediverse posts

Registration for G4G16 is open, and scholarships are available.

Main page:
https://www.gathering4gardner.org/g4g16-info/

What is the "Gathering 4 Gardner"?

Introductory video:

https://www.youtube.com/watch?v=37aDKvnyQWU

#G4G #G4G16

Adam Atkinson and an abbreviated version of the Heavy Boots story:

https://www.youtube.com/watch?v=QTbUqa0LUkI

#Story #G4G #WTF

I nice talk from #g4g about #juggling https://youtu.be/phZXLYkRhro

The story Jay Gilligan tells: 100 years ago, jugglers figured out the effect they wanted and then made props to match. But today, juggling tends to use the same props everybody buys off the internet. For a visual art, this is only half the job! What can performers do by modifying their props or palettes?

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

There is still a variety of unique items available for purchase through the end of the year in the Gathering 4 Gardner online auction fundraiser. These make unique stocking stuffers and other holiday gifts.

Special items include folding paper puzzles, Celebration of Mind memorabilia, flexagons, games, specialty dice, illusions, magic tricks, artwork, and much more. Your purchase will help fund G4G16 scholarships, virtual Celebration of Mind talks, and other important outreach initiatives.

View the items here:

https://www.charity.ebay.com/charity/Gathering-4-Gardner%2C-Inc./1212231

#G4G

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

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

The #G4G auction is a unique opportunity to acquire items not available anywhere else.

IT ENDS TOMORROW!

Have a look, ideal for presents, or even for yourself.

https://www.charity.ebay.com/charity/i/Gathering-4-Gardner,-Inc./219344

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

Video from #G4G15 :

Thomas Draper:
Monoidal Categories for Modelling Physical Systems and Language
https://www.youtube.com/watch?v=3OLr_WAgQuQ

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 :

Woody Aragon: Sleight of Math
https://www.youtube.com/watch?v=sOmN_0O_E4s

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 is inevitable as time goes by that we lose people from the #G4G community. This video from #G4G15 remembers some of our most recent losses.

G4G Tributes
https://www.youtube.com/watch?v=bs74-ioxPfI

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

The talks from G4G are recorded and made available ... here's another one from #G4G15 :

Eliza Gallagher, 9x9 Project:
Building Math Identity One Digit at a Time
https://www.youtube.com/watch?v=zrK4uZDrfOk

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

"Beetle Escape" from Haoran Chen at #G4G: https://www.youtube.com/watch?v=rdjsGt0byOE

Beetles occupy an infinite quarter-plane grid, except for a triangle at the origin. If they can make horizontal and vertical checkers-style jumps (with the jumped-over beetle removed), how large of a triangle permits one beetle to escape to the origin?

The talk shows that escape is impossible for a diagonal of length 7 or more (using Conway's invariant argument for his soldier probem), but 56 beetles can create an escape for n=6.

Is this the best possible? When it is possible for two or more beetles to escape? What about other shapes cut from the half-plane? Lots of good #RecreationalMathematics here.