Posted by: Dave Richeson | March 22, 2009

The Four Color Problem Gets a Sharp New Hue ~ the strong perfect graph conjecture is settled: a graph with neither an odd hole nor an odd anti-hole is perfect

Surfaces the Ooze of the Past ~ it was nice to find this post after writing my post on surfaces last week

How to Build Your Own Hyperbolic Soccerball Model ~ Yay, it uses heptagons!

Pi-Search results ~ the first eight digits of e occur at position 73,154,827 in $\pi$, counting from the first digit after the decimal point (3.14159…76541251485650592454 27182818 56113932375821103355…)

Greek letters used in mathematics, science, and engineering

Bracketology: The Madness of March ~ is a win-win situation possible?

Putting things in perspective:

What does one TRILLION dollars look like? ~ How big is this number we have been hearing so much about?

How Many Gallons of Fuel Does it Take to Travel 350 Miles? ~ beware, the dotted, dashed, and solid lines are important!

Humor:

The Official Creebobby Comics Archetype Times Table ~ alien Lincoln versus zombie platypus

Twilight Legion of Eternal Math Zombies (3) ~ Uncountably many zombies

Found math image:

[image by fdecomite]