Full Idea
Those who hold that not all mathematical questions can be concerned with structural matters can point to 'why are π or e transcendental?' or 'how are the prime numbers distributed?' as questions about particular features in the domain.
Gist of Idea
Some questions concern mathematical entities, rather than whole structures
Source
Kathrin Koslicki (The Structure of Objects [2008], 9.3.1 n6)
Book Reference
Koslicki,Kathrin: 'The Structure of Objects' [OUP 2008], p.241
A Reaction
[She cites Mac Lane on this] The reply would have to be that we only have those particular notions because we have abstracted them from structures, as in deriving π for circles.