3 ms·
> De Morgan's law. The union of two properties is the intersection of the sets of people who have those properties. (And vice versa.) De Morgan's Law!!!!!!! I
by niels_olson 16y ago
> De Morgan's law. The union of two properties is the intersection of the sets of people who have those properties. (And vice versa.)
De Morgan's Law!!!!!!! I first learned about this in a Moore-method point-set topology class in 1995, and I have been trying to remember the name of this property since. Thank you, thank you, thank you!