## Extensive Abstraction |

*Since every region includes other regions, and since the relation of inclusion is
transitive, it is evident that every abstractive set must be composed of an
infinite
number of members.* (PR 298/454).

One uses divisibility: *the divisible character of the undivided region* (PR 284/435).

The method of extensive abstraction describes *convergence*, for example to a point.

A point **is** nothing else than such an abstractive set

(or better, an equivalence class of such abstractive sets).
* A point is a nexus of actual entities.* (PR 302/461)
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