Fiboquadratic Sequences and Extensions of the Cassini Identity Raised From the Study of Rithmomachia
Article by Tomás Guardia and Douglas Jiménez
In collections: Fibonaccinalia, Games to play with friends, History
In this paper, we introduce fiboquadratic...
Mechanical Computing Systems Using Only Links and Rotary Joints
Article by Ralph C. Merkle and Robert A. Freitas Jr. and Tad Hogg and Thomas E. Moore and Matthew S. Moses and James Ryley
In collections: Basically computer science, Things to make and do, Unusual computers
A new paradigm for mechanical...
Alan Turing is the face of the new £50 note
The Bank of England has announced, following a public poll, that the new £50 note will feature mathematician, cryptographer and computer science pioneer Alan Turing. While this might seem like unambiguous good news, the issues it raises are more complicated than they first appear. Here’s a guest post from LGBT+ mathematician Calvin Smith with his… https://aperiodical.com/2019/07/alan-turing-is-the-face-of-the-new-50-note/
Leiden wall formulas: http://muurformules.nl/
The last time I was in Leiden they were decorating the exterior walls of all their buildings with poems of many different languages. Now they've moved on to the language of mathematics.
Spoilers and 3d printer files
If you've worked it out and want to print your own, or you want a spoiler, I've put it on thingiverse: https://www.thingiverse.com/thing:3739660
Is anyone already making an LTI provider for serving EPUB books? @baldur, do you know?
The annual Great Internet Math-off is happening at @blog — view and vote on your favorites!
So far we've had commutativity of log-exponentiation vs weather infovis (https://aperiodical.com/2019/07/the-big-internet-math-off-2019-group-1-alex-corner-vs-lucy-rycroft-smith/), the geometry of the Sydney Opera House vs straight lines on a donut (https://aperiodical.com/2019/07/the-big-internet-math-off-2019-group-2-marianne-rachel-vs-vincent-pantaloni/), multiplication tables and muffins (https://aperiodical.com/2019/07/the-big-internet-math-off-2019-group-3-vicky-neale-vs-jim-propp/) and a video on shapes in La Sagrada Familia (shot on location?!) vs an intro to fractals (https://aperiodical.com/2019/07/the-big-internet-math-off-2019-group-4-colin-beveridge-vs-kyle-d-evans/). More daily for roughly a month.
@anne @christianp Wikipedia says the members of this field are called the constructible numbers: https://en.wikipedia.org/wiki/Constructible_number
You can also call it the quadratic closure of the rationals.
For those who haven't heard of en_DK before, it's the "European English" (for want of a better description) locale.
It uses Commonwealth English (en_GB) for strings and ISO-14651-1 for collates.
Dates are in YYYY-MM-DD, time is in 24h HH:MM format, Monday is the first day of the week, comma is the decimal separator, currency is euro and standard paper size is A4.
Mathematician, koala fan, mathstodon.xyz admin,
⅓ of https://aperiodical.com
A Mastodon instance for maths people. The kind of people who make \(\pi z^2 \times a\) jokes.
\) for inline LaTeX, and
\] for display mode.