
Snow leopard + wordpress + latex problem
Ever since I’ve upgraded to Snow Leopard I’ve been having problems with the webserver. At first there were the ‘obvious’ problems : mysqlconnection lost and phperror message. These were swiftly dealt with using the excellent Snow Leopard, Apache, PHP, MySQL and WordPress! advice from ‘tady’. Right now, access to this blog is extremely slow (and […]

sporadic simple games
About a year ago I did a series of posts on games associated to the Mathieu sporadic group $M_{12} $, starting with a post on Conway’s puzzle M(13), and, continuing with a discussion of mathematical blackjack. The idea at the time was to write a book for a general audience, as discussed at the start…

quick iTouch links
MacBookAir? Is this really the best Apple could come up with? A laptop you can slide under the door or put in an envelop? Yeez… Probably the hotairbook is about as thick as an iTouch. The first thing I did was to buy a leather case to protect the vulnerable thing, making it as thick…

top iTouch hacks
So, you did jailbreak your iTouch and did install some fun or useful stuff via the Install.app … but then, suddenly, the next program on your wishlist fails to install ??!! I know you hate to do drastic things to your iTouch, but sooner or later you’ll have to do it, so why not NOW?…

first things first : jailbreak
You may have surmised it from reading this post : Santa brought me an iPod Touch! (( or rather : Santa brought PD2 an iTouch and knowing his jealous nature ordered one for him as well… )) Ive used an iPodClassic to transfer huge files between home (MacBook) and office (iMac) as well as for…

NeB on Leopard and iPhone
If you have an iPhone or iPod Touch and point your Safari browser to this blog you can now view it in optimised format, thanks to the iWPhone WordPress Plugin and Theme. I’ve only changed the CSS slightly to have the same greeny lookandfeel of the current redoable theme. Upgrading a WordPressblog running under Tiger…

The Mathieu groupoid (1)
Conway’s puzzle M(13) is a variation on the 15puzzle played with the 13 points in the projective plane $\mathbb{P}^2(\mathbb{F}_3) $. The desired position is given on the left where all the counters are placed at at the points having that label (the point corresponding to the hole in the drawing has label 0). A typical…

Conway’s puzzle M(13)
In the series “Mathieu games” we describe some mathematical games and puzzles connected to simple groups. We will encounter Conway’s M(13)puzzle, the classic Loyd’s 15puzzle and mathematical blackjack based on Mathieu’s sporadic simple group M(12).