It's worth watching the full interview (above). It got quite deep for a glitzy award show chinwag.
В МОК высказались об отстранении израильских и американских спортсменов20:59
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Screen size: 201 inches
Ownership and borrowing
it just works. no special machinery needed. the boolean operators distribute over derivatives the same way union does. derivatives are such a powerful and interesting tool that i will dedicate a separate post to them, but the main point is that they give us a simple and uniform way to handle all regular language features, including intersection and complement.