Full Idea
We can see an object as being the abstract of a concept with respect to a relation on concepts. For example, we may say that 0 is the abstract of the empty concept with respect to the relation of one-one correspondence.
Gist of Idea
An object is the abstract of a concept with respect to a relation on concepts
Source
Kit Fine (The Limits of Abstraction [2002], I.2)
Book Reference
Fine,Kit: 'The Limits of Abstraction' [OUP 2008], p.28
A Reaction
This is Fine's attempt to give a modified account of the Fregean approach to abstraction. He says that the reference to a relation will solve the problem of identity between abstractions.