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“Say No To Mathematically Impossible Street Signs” Badge
Matt Parker is running a campaign to pressure the UK government into fixing the geometry of its street signs. This is a set of “Say No To Mathematically Impossible Street Signs” badges to raise awareness of this pressing issue.
13 Serpentine Symmetries
A full-color printed card showing and explaining Serpentine Symmetries, a beaded jewelry set that illustrates the 13 wallpaper groups compatible with bead crochet rope. Serpentine Symmetries was part of the 2018 Joint Mathematics Meetings Exhibition…
15 Mathemagics for G4G15 - In Between Magic and Topology
This paper presents 15 vignettes, each designed to evoke both mathematics and magic. We end with a super-generalization of the Chefalo Rope Trick and the insight that 15 = 3 x 5 = 1x1 + 1 x 1 + 2 x 2 + 3 x 3.
15D G4G
Build your own Zometool shadow projected from a 15-dimensional hyper-cubic lattice.
4 x 13
The talk corresponding to this paper can be found here: https://www.youtube.com/watch?v=ZijlID83FTg&t=15s
4-gons and 13-gons
A circle sticker with an image of a hyperbolic tiling of 4-gons and 13-gons.
A Fair Die of 13 Faces
A cube is used as a fair die of 6 faces. However, there are many dice of different shapes on the market. To make them fair, most of them usually have some symmetric shapes. I classify these variants of dice on the market into two groups. First, let's…
A Figurative Tree
Artwork of a low-resolution figurative tree.
Abstract Photograph - Acura TL
One of my interests is abstract photography, using ordinary photographs as the “paint” and using spatial and mathematical transformations to create an image from one or more sources. One transformation that I’ve been exploring is “Inside Out”, which…
Ace of Spades
My gift is an Ace of Spades personalized with a unique image that combines the G4G logo together with a symbolic representation of Panamanian culture.
Akio's Dahlia Star Translucent
I invented the Fibonacci Turbine in an origami way. The wing itself functions as a rotating shaft. The structure is so simple that it is robust. It can be used for many engineering applications.
Apollonian Dreams
Water drops fall into a lake and create ripples. For a fleeting moment these rings show an Apollonian gasket. The physical gift will be a postcard with the picture.
Catalan Solid Net for further play
The included piece will be a decorated deltoidal icositetrahedron net, which can be colored and subsequently cut and assembled. Alternatively, those with a cutting machine can cut the closed regions on each face of the polyhedron to obtain an…
Cellular Auto-mons
Trading cards of cellular automata patterns. A QR code to an interactive site for viewing the pattern is planned to be included on the back
Chiral Icosahedral Hinge Elastegrity’s Geometry of Motion
The Chiral Icosahedral Hinge Elastegrity resulted from a Bauhaus paper folding exercise, that asks material and structure to dictate form. The key new object obtained in 1982 involved cutting slits into folded pieces of paper and weaving them into 8…
Chirality of Flexagons
A chiral flexagons with a secret message
Circo Mathematico Deck of Cards
For it's decade of existence the Circo Matemático (mathematical circus), a autonome group of popularisers of mathematics part of the Ludus Association, designed a deck of cards.
The poker-sized cards (63x88 mm) are COPAG 310 quality, slimline, with…
The poker-sized cards (63x88 mm) are COPAG 310 quality, slimline, with…
Coffee Stirrer Structures and HyperTiles
Easy and inexpensive geometric frames (of truncated cubes or dodecahedra, for example) can be constructed from coffee stirrers and twist ties. These can be used to hang from the ceiling or to dip in soapy water. When one such frame, tetrahedral in…
Color Contrast Contortions
We consider various combinatorial problems and puzzles that arise in trying to arrange squares of contrasting colors.
