Éric Angelini
13 articles published in Tangente
Math for everyoneN°92Dec 04, 2024Polygonizing a number
Several methods can be used to associate a polygon with a given number.
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Math for everyoneN°89Feb 16, 2024Fractions in the temple of integers?
As its name suggests, Neil Sloane's On-Line Encyclopedia of Integer Sequences contains only integers. Yet there is a roundabout way to introduce fractions into it…
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History and CultureN°211May 02, 2023The Game of Life: An English-language bible
The many devotees of the Game of Life, devised by John Conway in 1970, now have their bible.
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Math for everyoneN°199Apr 19, 2021The artist and the number
Mathematics in general, and numbers in particular, have inspired many artists, including Dalí and Picabia. Some are drawn to the magic of numbers. Others find beauty in number sequences, which they bring to life in graphic art or painting.
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Math for everyoneN°76Nov 06, 2020A spiral of digits!
An entertaining blend of arithmetic and graphics lets us display the successive terms of an arithmetic sequence visually. This calls for some explanation—and decoding!
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History and CultureN°194May 21, 2020Sequences and conjectures
Conway loved playing with number sequences. His explorations led him to formulate conjectures that are elementary to state but formidable to tackle.
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Math for everyoneN°193Mar 23, 2020Jumps in sequences
By playing with letters, digits and numbers, we can build sequences whose "stop" and "restart" rules reveal surprising arithmetic phenomena. It would take a clever mind indeed to fathom the jumps between successive terms!
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Math for everyoneN°192Jan 23, 2020Self-reference at every level
We do not always pay attention to them, but self-referential sentences and turns of phrase surround us every day!
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Math for everyoneN°192Jan 22, 2020Pure and impure self-reference
Self-reference is not "pure". It must be tied to an object, a situation or a concept—here, for instance, artistic creation, and photography in particular.
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Math for everyoneN°192Jan 22, 2020When works speak for themselves
Advertising regularly makes use of it, as do graphic designers and artists. Self-reference has become a genre in its own right, appealing not only to our eyes but to all our senses! Let's take a wild tour of this seemingly limitless creativity.
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Math for everyoneNov 25, 2019Word games
Words, too, are fertile ground for self-referential curiosities. Here are a few.
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Math for everyoneNov 22, 2019Playing with numbers
Can the digits of a number, or the terms of a number sequence, themselves tell readers about their positions or properties? With a few ingenious constructions, they can!
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