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7. Existence / C. Structure of Existence / 7. Abstract/Concrete / b. Levels of abstraction

[possible degrees or levels of abstraction]

6 ideas
We can rise by degrees through abstraction, with higher levels representing more things [Arnauld,A/Nicole,P]
If objects are just presentation, we get increasing abstraction by ignoring their properties [Frege]
A generative conception of abstracts proposes stages, based on concepts of previous objects [Fine,K]
Mathematics has ascended to higher and higher levels of abstraction [Burgess/Rosen]
Abstraction is on a scale, of sets, to attributes, to type-formulas, to token-formulas [Burgess/Rosen]
There is a hierarchy of abstraction, based on steps taken by equivalence relations [Hale]