Xah Math Blog Archive 2015-06 to 2015-09

ancient article, still relevant. Google Chrome killed MathML. The TeX Pestilence (Why TeX/LaTeX Sucks)

xah math books 20150919 181118-s
Math and Geometry Books
groups a path to geometry by R P Burn book
〈Groups: A Path to Geometry〉 by R P Burn. Buy at amazon

there's this book 〈Groups: A Path to Geometry〉 by R P Burn. Buy at amazon I bought in year 2000.

I never got time to read it. When i bought it, i thought, i really want to understand the subject.

today, picking it up, haha, i understand all of it.

not bad for magically reading book in 15 years.

if you are in Mountain View, CA, area, come pick it up if you like.

comment at https://plus.google.com/+XahLee/posts/7Fri5maT94T

McGee graph

golly, each time John Baez posts something about math, 30 minutes will be gone if i just glance over to enjoy but understand nothing. And feeling terribly bad about my incompetence et al. Half a day will be gone if i tried to understand something. And feeling terribly bad about escapism. And by next month, all's forgotten.

here, have a cookie.

anyway, here's graph theory, projective geometry, affine transformation, group theory. All my favorite cookies.

McGee graph 37662
McGee graph

comment at https://plus.google.com/+XahLee/posts/K5fEptxAa1e

the Nature of Associative Property of Algebra (minor update)

Seashell Gallery

[• The reason why Involute gears turn smoothly. By Hyprodium. At http://hyrodium.tumblr.com/post/123270340099/the-reason-why-involute-gears-turn-smoothly-fig , Accessed on 2015-08-15 ]

see also Involute

[• John Horton Conway: the world's most charismatic mathematician By Siobhan Roberts. At http://www.theguardian.com/science/2015/jul/23/john-horton-conway-the-most-charismatic-mathematician-in-the-world , Accessed on 2015-08-15 ]

abacus pink rabbit 1


a new book. A biography of John Horton Conway

Genius At Play: The Curious Mind of John Horton Conway By Siobhan Roberts. @ Buy at amazon

Chen's theorem: every sufficiently large even number can be written as the sum of either two primes, or a prime and a semiprime (the product of two primes). Chen's theorem

A Guide to Plane Algebraic Curves by Keith Kending. @ Buy at amazon

Geometry: Requirements for a Visualization System for 2020 (repost)

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