more from Penelope Maddy

### Single Idea 18182

#### [catalogued under 6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / c. Fregean numbers]

Full Idea

I attach no decisive importance even to bringing in the extension of the concepts at all.

Gist of Idea

The extension of concepts is not important to me

Source

Penelope Maddy (Naturalism in Mathematics [1997], §107)

Book Reference

Maddy,Penelope: 'Naturalism in Mathematics' [OUP 2000], p.117

A Reaction

He almost seems to equate the concept with its extension, but that seems to raise all sorts of questions, about indeterminate and fluctuating extensions.

Related Idea

Idea 18181
The Number for F is the extension of 'equal to F' (or maybe just F itself) **[Frege]**