I think impostor syndrome is a good bet for you, at least by comparison with me, since I only see about 3 of these propositions in myself.
In spite of getting A's up through Calculus II in high school, I stopped taking math after that (except for a couple of applied math subjects like number theory and statistics) because I had reached the point where math problems were starting to (literally, not figuratively) give me a headache when I tried to "hold them in my mind".
I am curious if other people on Lesswrong ever experienced the "this literally hurts my head" barrier at any point in math, and if so when.
Trying to memorize a phone number gives me a headache, but studying mathematics doesn't. I don't think this is a native ability (not entirely), but something you pick up with experience.
The analogy between learning math and "holding something in your mind" might be what Anon_User was trying to criticize with this:
...Your intuitive thinking about a problem is productive and usefully structured, wasting little time on being aimlessly puzzled. For example, when answering a question about a high-dimensional space (e.g., whether a certain kind of rota
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