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Single Idea 15937

[filed under theme 4. Formal Logic / F. Set Theory ST / 3. Types of Set / d. Infinite Sets ]

Full Idea

Many of those who are skeptical about the existence of infinite combinatorial collections would want to doubt or deny the Axiom of Choice.

Gist of Idea

Those who reject infinite collections also want to reject the Axiom of Choice

Source

Shaughan Lavine (Understanding the Infinite [1994], VI.2)

Book Ref

Lavine,Shaughan: 'Understanding the Infinite' [Harvard 1994], p.164


The 10 ideas with the same theme [sets which contain an infinity of members]:

An infinite set maps into its own proper subset [Dedekind, by Reck/Price]
The continuum is the powerset of the integers, which moves up a level [Cantor, by Clegg]
Cantor showed that supposed contradictions in infinity were just a lack of clarity [Cantor, by Potter]
We can enumerate finite classes, but an intensional definition is needed for infinite classes [Russell]
We understand some statements about all sets [Putnam]
Set theory says that natural numbers are an actual infinity (to accommodate their powerset) [Brown,JR]
Set theory made a closer study of infinity possible [Clegg]
Any set can always generate a larger set - its powerset, of subsets [Clegg]
Those who reject infinite collections also want to reject the Axiom of Choice [Lavine]
Infinite sets correspond one-to-one with a subset [Friend]