What the Liar Taught Achilles
Science
Gary Mar
G4G13 Gift Exchange Book
G13-P079
The Sirius Enigmas Mathematical Tops
Science
Kenneth Brecher
G4G14 Gift Exchange Book
G14-P066
The Dynamics of Spinning Polyominoes
Science
George I. Bell
G4G13 Gift Exchange Book
G13-P077
The Book of Why Postcard
Science
This item is a postcard announcing The Book of Why, by Judea Pearl and Dana Mackenzie, a book to be published in May 2018 by Basic Books. This book confronts the hoary old adage, "Correlation is not causation," which has been taught to generations of statisticians and scientists and used as a pretext to avoid talking about causation. Pearl has developed mathematical algorithms for reasoning about cause and effect, and the book gives numerous examples of how these can be put into practice. It is intended for a popular (non-technical) audience.
G4G13
Dana Mackenzie
public
G13-100
Surface Tension Bar Bet
Game
Toy
Science
It is a set of objects (one yen, match, cheerio, etc.) with a small instruction sheet for puzzle/ bets and references.
G4G13
Tiago Hirth
public
G13-014
Sketching a Projectile On a Ramp
Science
Gary Antonick
G4G13 Gift Exchange Book
G13-P076
Knotted Bracelet
Puzzle
Toy
Science
A hand-made rubber bracelet in the form of a trefoil knot. It is a mathematical curiosity, a puzzle, an impossible object, and a piece of nerdy jewelry.
G4G13
George Hart
Elisabeth Heathfield
public
G13-016
Introducing the PiTop
Science
Kenneth Brecher
G4G13 Gift Exchange Book
G13-P078
Global Maps - Past and Future
Art
Science
Two Lenticular cards from Germany - one shows Pangea the last supercontinent 300 million years ago, and the second card shows the map of the globe in the next Heat Age when all the ice melts. This may result in a net gain in land!
G4G13
Timothy Rowett
public
G13-087
Flippe Tops
Science
George Bell
G4G14 Gift Exchange Book
G14-P065
Fibonacci Turbine and Cone-Puter for Cone-tined Fraction by Cone-pass
Science
Akio Hizume
G4G14 Gift Exchange Book
G14-P068
Does Conway's "Game of Life" Predict that the Speed of Light is Constant in the Real World
Science
Jim Weinrich
G4G14 Gift Exchange Book
G14-P069
Conspiracy Theories
Science
Robert Crease
G4G14 Gift Exchange Book
G14-P067
A Gift of the Number 13 for G4G13
Rec Math
Science
Participants will receive one spruce cone along with instructions on how to read the number 13 in it.
G4G13
Joe DeVincentis
public
G13-094