Math is Subjunctively Objective
This might be stupid, but it's probably more intelligent than the 'subjunctive mood' grammar-joke I was going to tell.
Suppose I say, "Even if my mother were kidnapped by terrorists, I would still consider all terrorists freedom-fighters."
Suppose I believe that with such conviction that I'm unable to imagine a reality in which, regardless of whether the physical state of my brain changes, it would not still be true that terrorists+mom=freedom fighters. (The "terms" of this "equation" don't necessarily correspond with anything in the OP. The analogy is still functional).
In other words, I can dream up a scenario where terrorists are just terrorists, but I cannot fathom such a state of affairs actually coming to be.
So would this be subjunctively objective like your numerical epistemology or would it simply mean that my imagination is defective?
BTW, I don't truly believe anything I just wrote.