Slides for arc, mutex and simple example?

[lislis]

I was looking for slides to introduce Arc and Mutex (maybe with comparisons to Rc and Cell or similar) and use them together with the slides on Send and Sync to talk about threading. Or do they exist and are just not linked on the overview?

[jonathanpallant]

I had the same question training the other day - in the end I just live-sketched something.