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robertfathauer.bsky.social @robertfathauer.bsky.social · 07/09/2026

Spial aloes in Lesotho, where they are the national flower

robertfathauer.bsky.social @robertfathauer.bsky.social · 21/08/2026

How many distinct tiles are there in this Nice street paving, and how many tiles are there in the translational repeat unit?

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robertfathauer.bsky.social @robertfathauer.bsky.social · 08/08/2026

Some fiber art in the the art exhibition at the Bridges Conference in Galway, Ireland

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robertfathauer.bsky.social @robertfathauer.bsky.social · 06/08/2026

Art Exhibition at the 2026 Bridges Conference in Galway, Ireland, during set-up (top) and opening reception (bottom).

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robertfathauer.bsky.social @robertfathauer.bsky.social · 02/08/2026

I added several new self-replicating tiles to my "Fractal Reptiles Based on Polyforms" website. I'll be talking about these at the Bridges Conference in Galway, Ireland this week. mathartfun.com/fractaldiver...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 29/07/2026

Fractal self-replicating tile formed by iterating a tri-kite, reflecting between successive iterations

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robertfathauer.bsky.social @robertfathauer.bsky.social · 19/07/2026

The Dice Lab's popular Skew dice gamer's set is now available in purple and Malachite. mathartfun.com/DiceLabDice....

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robertfathauer.bsky.social @robertfathauer.bsky.social · 05/07/2026

Over 5,500 mathematical artworks can now be browsed in an attractive new gallery-wall layout on the Bridges website, thanks to the efforts of Nathan Selikoff: gallery.bridgesmathart.org/gallery?seed...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 29/06/2026

I don’t recall ever seeing a toroidal box before. This one, at the Phoenix Art Museum, is a beauty. Chinese, Qing Dynasty (1650-1700), cloisonné enamel on bronze, for Buddhist prayer beads.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 25/06/2026

The website for the 2026 Bridges Conference Exhibition of Mathematical Art, Craft, and Design is now live, featuring the work of more than 150 artists. gallery.bridgesmathart.org/exhibitions/...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 21/06/2026

My 2027 Bridges Conference paper, entitled “Iterating Polyiamonds, Polyhexes, and other Polyforms to Create Fractal Reptiles,” is available: mathartfun.com/fractaldiver...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 01/06/2026

These pavers are seen throughout the historic center of Puebla, Mexico.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 31/05/2026

In the convent in Metztitlan, Hidalgo, Mexico

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robertfathauer.bsky.social @robertfathauer.bsky.social · 24/05/2026

New hand-built ceramic piece, with bamboo and leather; mathematically, a Hopf link with Seifert surface. www.mathartfun.com/robertfathau...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 05/04/2026

Fractal self-replicating tile formed by iterating a 3-kite

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robertfathauer.bsky.social @robertfathauer.bsky.social · 29/03/2026

A fractal self-replicating tile created by iterating a pentabolo

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robertfathauer.bsky.social @robertfathauer.bsky.social · 24/03/2026

Pavers in Negombo, Sri Lanka, photogaraphed by a friend earlier today

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robertfathauer.bsky.social @robertfathauer.bsky.social · 22/03/2026

Another √6-scaled fractal self-replicating tile. This one is based on a rhombic grid in which the grid cells have diagonals measuring 1 and √15/3.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 15/03/2026

Using square- or triangle-based grids, there are no overlapping transformations of the grid for n = 6. By distorting a grid, for example stretching a square grid by √2, n=6 becomes allowed. Here a hexa-rectangle is used to form a fractal self-replicating tile.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 19/02/2026

Charles O Perry sculpture in the lobby of the Hyatt Regency in San Francisco

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robertfathauer.bsky.social @robertfathauer.bsky.social · 23/01/2026

Fractal self-replicating tile created by iterating a tetrakite seven times

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robertfathauer.bsky.social @robertfathauer.bsky.social · 12/01/2026

Wth Sujan Shrestha at the Computer Museum, in Hunt Valley, MD last week. This is one of around 70 Apple-1 computers whose whereabouts are known, out of around 200 total made.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 11/12/2025

The online gallery for 2026 Joint Mathematics Meetings Exhibition of Mathematical Art is now live: gallery.bridgesmathart.org/exhibitions/....

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robertfathauer.bsky.social @robertfathauer.bsky.social · 20/11/2025

5-stars were commonly used on the ceilings of tombs and other buildings in Ancient Egypt to depict the heavens. They are usually not connected to one another, but they are connected in this ceiling in the Ptolemaic Denderah Temple to form a sort of tessellation of hexagons and quadrilaterals.

Ancient Egyptian ceiling with a star motif

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robertfathauer.bsky.social @robertfathauer.bsky.social · 09/11/2025

Ancient Egyptian numbers used to track sacrifices on the side of the Temple of Ramesses III (1217 BC - 1155 BC) in Luxor. A vertical tick mark denotes 1 and an inverted U ten.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 09/11/2025

Great "tessellation" on the ceiling of the 20th Dynasty (ca 1100 BC) Tomb of Anherkha in the Valley of the Workers in Luxor

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robertfathauer.bsky.social @robertfathauer.bsky.social · 05/11/2025

Another type of Cairo pentagon paver in Cairo.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 05/11/2025

Everyone is invited to attend the SCULPT 2025: Show & Tell, a digital gathering that celebrates creative exploration across art, geometry, design, and fabrication. Date: Friday, November 7, 2025 Time: 8:00 – 10:30 AM (PST) Zoom Link: cca.zoom.us/j/9826107944...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 24/10/2025

Polyaboloes, polygons formed by joining isosceles right triangles in edge-to-edge fashion, can also be arranged iteratively to form fractal self-replicating tiles. A particular tetrabolo was used to form these two reptiles, with mirroring between successive iterations employed in the right one.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 22/10/2025

Two fractal self-replicating tiles formed by iterating a 4-rhomb. On the right with mirroring between successive iterations.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 11/10/2025

This weekend would be a great time to submit your art for the exhibition to be held at the Joint Mathematics Meetings. Take advantage of this opportunity to share your work with over 5000 attendees this January in Washington, DC. You’ll need to submit by the 15th at gallery.bridgesmathart.org.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 08/10/2025

Polyrhombs, formed by joining 60°-120° rhombi in edge-to-edge fashion, can also be iterated to form self-replicating tiles. A 3-rhomb iterates to the same fractal as the envelope of the terdragon curve. Mirroring between successive iterations yields a very different looking reptile (right).

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robertfathauer.bsky.social @robertfathauer.bsky.social · 02/10/2025

I just finished a new website on fractal self-replicating tiles ("reptiles") based on polyominoes, polyhexes, and polyiamonds: www.mathartfun.com/fractaldiver...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 26/09/2025

New sculpture illustrating the fact that cutting a three-half-twists band lengthwise results in a trefoil knot. Unglazed ceramic and leather cord.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 25/09/2025

Submissions are now being accepted for the Exhibition of Mathematical Art to be held as part of the Joint Mathematics Meetings, Washington, DC, in January of 2026. Apply online through October 15 at gallery.bridgesmathart.org. pic.x.com/MGSEyexSzo

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robertfathauer.bsky.social @robertfathauer.bsky.social · 11/09/2025

A new article is out of which I'm a coauthor: "Visualization of Escher-like hyperbolic tessellations": www.sciencedirect.com/science/arti...

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robertfathauer.bsky.social @robertfathauer.bsky.social · 05/09/2025

Submissions are now being accepted through September 14 for SCULPT 2025. Accepted work will be presented in a ZOOM Show and Tell event on November 7. In addition, works will be digitally showcased in the exhibition section of SCULPT 2025 and in a proceedings volume.

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robertfathauer.bsky.social @robertfathauer.bsky.social · 29/08/2025

This mixed-media piece consists of an unglazed black-clay ceramic band with two half twists, making it a two-sided object. Steel dowels with long and short ends are spaced along the centerline to define a second band with two half twists, orthogonal to the first.