My first thought is that it's a "bottom right" story (i.e. present, contemplations, conceiving an idea, learning).
The MC concern is probably mind / conscious. Acceptance is likely the change/good MC's solution since he accepts the hallucinations as such & accepts the need for treatment, and this resolves his angst.
The downplayed OS is probably centered around the math work: learning? I think it's also success due to the solution of acceptance (the pens at the college club; the Nobel prize as acceptance by his peers).
For the OS, I first considered the literal "conceiving an idea" (i.e. a new idea everyone at college is talking about), but I think that is more akin to the subject matter. I doubt the OS is in manipulation because the math work seems very straightforward as opposed to mind games.
The IC concern of present might be his wife's difficulty with living in the present with this guy. That's not great, but it's my hunch. And maybe an RS concern of conceiving is her trying get him to grasp that he sees hallucinations, needs the meds, etc. Meanwhile, he's trying to get her to grasp that they are after him, etc.