4d shapes
9d colors

Ulugh Beg Observatory Museum, Samarkand, Uzbekistan

The Nilgeometric Geodesic Cone in horizontal view

A yet another visualization of the distortions of the Mercator projection.

An ASCII map using the Mercator projection is projected back on a sphere. In the map, all the characters are of the same size.

XYZ Rhombic, modular @origami stars made with paper from New Zealand and South Korea

Concise instructions https://woodenbooks.com/index.php#!ORI/24 (bottom of page 41)

For your first attempt, use six 7.5 by 15 cm (3 by 6 inch) rectangles in three colours. Make sure each unit is identical or the assembly won’t work. Experienced folders can use 37.5 by 75 mm (1.5 by 3 inch) rectangles.

Humphry (the cat statue) and a tiling and hexagons and equilateral triangles, Alf Barrett playground, Old Gloucester St, London, England

My experience echoes this writer’s https://isobelandcat.wordpress.com/2012/05/03/the-back-story-of-humphry-and-marcia/
‘A while back, wandering around Bloomsbury on a sunny afternoon, I came across this sculpture in a children’s playground. … The plinth gave the cat’s name as Humphry, and the artist as Marcia Debra Solway. I looked about wondering if there was more information about why he was there, took a couple more photos, and made a mental note to look into it later.’

but the writer did the research for me:
'... on Flickr …’MARCIA SOLWAY was my daughter, she made this sculpture of HUMPHRY. He was the resident cat for 18 years at the Mary Ward Centre in Queen Square WCI...MARCIA suffered with EPILEPSY ...she died aged 34 years August 1992, the same year as HUMPHRY. MARCIA lived in Rosebery Ave ECI, she was an ardent cat lover’'

And that's a wrap for my report from this year's @bridgesmathart conference. It was great, as always! Many thanks to the organizers for a wonderful week of #MathArt. If you're interested, join us in Galway, 5-8 August '26. https://www.bridgesmathart.org/b2026/

The @bridgesmathart conference traditionally closes with "#Family Day," an offer of a collection of #arts and #crafts activities, openly and freely accessible to the public. Here, the community shares their love of #MathArt and #IllustratingMath with the local folks.

Watch a growing Nilgeometric Geodesic Cone in its full surrealist glory: https://youtu.be/q8DzaDr8gX0

Periodic Penrose rhombs, Garden Halls, Marchmont Street, London, England

Last keynote of this year's @bridgesmathart conference was by @grant on a work in progress: On artworks by Sol LeWitt and the related mathematics. It's always great to see new content from Grant, especially, if it is a #MathArt discussion. Looking forward to the full video!

Wednesday Night = Fashion Nightat the @bridgesmathart conference. Participants double as models, showcasing the latest #MathArt fashion and jewelry pieces on the runway. From earrings to magnificent dresses, we got to see it all. Overview at https://gallery.bridgesmathart.org/ soon.

^4/(1 + x^5 | y^5 | z^5) + &

Carved stone screen, Agra, India, 19th century, copied from earlier models, Victoria and Albert Museum, London

A 17x17 rhombus grid for #TilingTuesday

I'm at the @TUEindhoven today, for the @bridgesmathart conference. I'm looking forward to a great week of #MathArt. Find this year's articles all open access here: https://archive.bridgesmathart.org/2025/. I'll be live reporting from the conference, so if you couldn't come, I've got you covered.

Completing the quartet of brass display models, "Threefold" realizes part of the Bryant-Kusner parametrization of the real projective plane.

This 90mm unpolished brass piece was made by Shapeways in winter 2024 using lost-wax casting.
#Math #MathArt #3DPrinting

"Butterfly" is a depiction of the twisted cubic: The set of \((t, t^{2}, t^{3})\) as \(t\) ranges over four annuli in the complex unit disk (with discreet radial struts for support), suitably orthogonally projected to real 3-space.

The 90mm unpolished brass piece was made by Shapeways in spring 2023 using lost-wax casting.

3D DUCK
3D DUCK
(3rd dimension = time)
( = abs(1/ʒ)+c( division))