4 ideas
18085 | Values that approach zero, becoming less than any quantity, are 'infinitesimals' [Cauchy] |
18084 | When successive variable values approach a fixed value, that is its 'limit' [Cauchy] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |
8693 | An 'abstraction principle' says two things are identical if they are 'equivalent' in some respect [Boolos] |