Christian Lawson-Perfect @christianp@mathstodon.xyz

A quick round-up of three recent Wikipedia Good Articles:

Factorial, https://en.wikipedia.org/wiki/Factorial – you know, \(n!\).

Jessen's icosahedron, https://en.wikipedia.org/wiki/Jessen%27s_icosahedron – polyhedron with all-right dihedrals despite not having axis-parallel sides; the shape of the "Skwish" tensegrity

Erdős–Straus conjecture, https://en.wikipedia.org/wiki/Erd%C5%91s%E2%80%93Straus_conjecture – the question of whether \(\frac{4}{n}=\frac{1}{x}+\frac{1}{y}+\frac{1}{z}\) has positive integer solutions for all \(n>1\)

The term `angle' in the international system of units
Article by Michael P. Krystek
In collections: History, Notation and conventions
The concept of an angle is one that often causes difficulties in metrology. These are partly caused by a confusing mixture of several mathematical terms, partly by real mathematical difficulties and finally by imprecise terminology. The purpose of this publication is to...
URL: http://arxiv.org/abs/2101.01023v2
PDF: http://arxiv.org/pdf/2101.01023v2
Entry: https://read.somethingorotherwhatever.com/entry/Thetermangleintheinternationalsystemofunits

Find out how good you are at placing historical events in the right order with this cool new game based on Wikidata's data:

https://wikitrivia.tomjwatson.com/

This is awesome!

@christianp I notice you are now square, triangular, and Kryptonic.

Have a good one.

Mean Girls was affected by outliers; Median Girls is probably more representative of the typical clique

- can you explain this 2 years gap in your resume?
- i was setting a custom font with LateX on the said resume

Word calculus in the fundamental group of the Menger curve
Article by Hanspeter Fischer and Andreas Zastrow
In collections: Combinatorics, Fun maths facts, Games to play with friends, The groups group
The fundamental group of the Menger universal curve is uncountable and not free, although all of its finitely generated subgroups are free. It contains an isomorphic copy of the fundamental group of every...
URL: http://arxiv.org/abs/1310.7968v1
PDF: http://arxiv.org/pdf/1310.7968v1
Entry: https://read.somethingorotherwhatever.com/entry/WordcalculusinthefundamentalgroupoftheMengercurve

Does mathstodon have any content rules about improperly using arithmetic?

The Fastest and Shortest Algorithm for All Well-Defined Problems
Article by Hutter, Marcus
In collections: Attention-grabbing titles, Basically computer science
An algorithm M is described that solves any well-defined problem p as quickly as the fastest algorithm computing a solution to p, save for a factor of 5 and low-order additive terms. M optimally distributes resources between the execution of...
URL: http://www.hutter1.net/ai/pfastprg.htm
PDF: https://arxiv.org/pdf/cs/0206022.pdf
Entry: https://read.somethingorotherwhatever.com/entry/Hutter2002