Xah Math Blog Archive 2015-04 to 2015-04

Cycloid (animation update)

polyhedron playground japan 2015-04-06
polyhedron playground Japan . 〔photo from 外薗葉月 https://plus.google.com/105047002579470450869/posts/Lgbe4ApL51b

Unicode Char for Logarithm?

apparently there's a Unicode char for log. . The Unicode name is “U+33D2: SQUARE LOG”. It's Japanese origin.

There's also a “U+33D1: SQUARE LN”

for many more, see http://www.unicode.org/charts/PDF/U3300.pdf

See also: Unicode Math Symbols ∑ ∫ π² ∞

(thanks to https://twitter.com/Ryuutei)

English/Chinese Math Terminology 中/英 数学术语 (minor update)

archimedes spiral
Archimedean Spiral (updated animation)
ball shadow
Conic Sections (updated animation)

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