Please spread the word! Video of "Graphs, Geometry and Gerrymandering" by Moon Duchin (cosponsored by G4G and Georgia Tech School of Math) youtube.com/watch?v=VU8CtV… American Mathematical Society SIAM MAA G4G Celebration

Fermat's Library ∛31 is accurate to 4 decimal places :)

Tuesday's Celebration of Mind presentation by Chaim Goodman-Strauss is on "Dodecafoam 2025, packing of space by a fractal froth of dodecahedra, scaled by powers of the golden ratio, related to the structure of novel “quasicrystalline” physical materials". gathering4gardner.org/com-2025-01-21/

Today Saturday, January 18, at 1pm ET, free Zoom presentation by Mark Burstein on “The Literary Englishman and the Scientific American” (Lewis Carroll & Martin Gardner) gathering4gardner.org/news-2025-01-17

Friday, February 21, 2025 at 12 noon Atlanta time: "Algebra and Serendipity: The Beautiful Mathematics of vZome" live presentation with Scott Vorthmann – gathering4gardner.org/com-2025-02-21

Martin Gardner tweet The presentation by Scott Vorthmann is very interesting! Serendipity: a spiral and a heptagon with inscribed heptagons from the presentation look like reciprocal frames in Popovic Larsen's book. See also en.wikipedia.org/wiki/Reciproca…

"A butterfly 4" The image appears to be concave. Copyright Akiyoshi Kitaoka 2015 (June 4)

Martin Gardner tweet The five-player intransitive dice problem is solved reddit.com/r/math/comment…

"Intersections: Math, Art, Truth, Humanity" – live Zoom presentation by Tracy Drinkwater, Friday, March 21, 2025 at 12 noon Atlanta time gathering4gardner.org/com-2025-03-21/

The heart appears to move.

Here's a nice "proof without words": The sum of the squares of several positive values can never be bigger than the square of their sum. This picture helps make sense of how ℓ₁ and ℓ₂ norms regularize and sparsify solutions (resp.). [1/n]

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I just put up a new video on the fundamentals of quantum computing, building up to a step-by-step walk-through of something known as Grover’s algorithm. Here's an excerpt of a quiz used to introduce the topic.

We don’t directly perceive the color of objects in the world. Instead, our brains infer color based on local context. [Link below.]

The collective intelligence of ants solving a dimensional puzzle. [🎞️ Wizeman Institute of Science]

New video of Philipp Legner on "Fantastic Folds – The Mathematical Secrets of Origami" youtube.com/watch?v=pQhog1…

Join us on Zoom on Wednesday, May 21 at 12 noon, Atlanta time, for "Squid Bang Theory" with Alda Carvalho. More info a gathering4gardner.org/com-2025-05-21/

Quick “teaser” for a fun #SIGGRAPH2025 project, led by Hossein Baktash, on optimizing a shape to have the desired rolling statistics. Basically we can turn arbitrary objects into fair dice, or make dice which capture the statistics of other objects—like several coin flips.

Today's G4G Saturday Social on Zoom at 1pm ET will see John Miller discuss ‘Langtominoes’, a new toy concept based on Langford’s Problem. Do join us! gathering4gardner.org/news-2025-06-27

Rows appear to move.