Re: The seven step-Mathematical preliminaries 2

From: Brent Meeker <meekerdb.domain.name.hidden>
Date: Sat, 06 Jun 2009 16:30:04 -0700

m.a. wrote:
> *Bruno,*
> * I've encountered some difficulty with the examples below.
> You say that "in extension" describes exhaustion or
> quasi-exhaustion. And you give the example: "**B = {3, 6, 9, 12, ...
> 99}".*
> * Then you define "in intension" with exactly the same type
> of set: "Example: Let A be the set {2, 4, 6, 8, 10, ... 100}".*

No, that's not the intensional definition. This "We can easily define A
in intension: A = the set of numbers which are even and more little
than 100." is the intensional definition.

Brent

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Received on Sat Jun 06 2009 - 16:30:04 PDT

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