On considering switching to OS X…

As this is a bit of a controversial topic, let me first note that all operating systems (including OS X) suck. The how and the why can be debated elsewhere, but in conclusion it’s a matter of finding one who’s bits that suck don’t annoy you too much such that you can gain the benefits…

Decomposing the Ulam spiral

The Ulam spiral is a well-known mystery to mathematicians: draw a 1 in a grid, 2 in the cell to the right, 3 above the 2, and so on in a spiral: 17 16 15 14 13 18 5 4 3 12 19 6 1 2 11 20 7 8 9 10 21 22 23…