Category Archives: chatter

“Venn diagram” partitioning

Paddy3118 wrote about partitioning elements in the same way a Venn diagram does. So, if we have sets A, B and C, the partitions are

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Linear Logic without Units

My PhD thesis (2007) was available for several years from my web site at the University of Manchester, but since that site was taken down it’s been unavailable. Today’s announcement is that I’ve finally got round to uploading it to GitHub.

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Puzzles like Adrift

Quite a few people were surprised by my description of Adrift as a “new game” – even though it was very new at the time – because they had seen similar games or puzzles before. You can read some of … Continue reading

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John H Conway and the invention of the filing cabinet

Conway is incredibly untidy. The tables in his room at the Department of Pure Mathematics and Mathematical Statistics in Cambridge are heaped high with papers, books, unanswered letters, notes, models, charts, tables, diagrams, dead cups of coffee, and the most … Continue reading

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The Prisoner’s Dilemma

The Prisoners’ Dilemma The Prisoner’s Dilemma is a game, but a game that seems to bear lessons for the conduct of human affairs more generally, and it has attracted a great deal of attention from men not noted for their … Continue reading

Posted in chatter, Mathematics | 23 Comments

Something all bash scripters need to know (and most of us don’t)

Calling all bash users. This is a public service announcement. Here’s something you need to know if you want to write bash scripts that work reliably, but you probably don’t.

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How to record a screencast video for free on Mac OS X

It’s hard to find any detailed information on the web about how to record a screen video without buying expensive software. I found out how to do it, so here I’m going to explain what I did for the benefit … Continue reading

Posted in chatter | 38 Comments