If one believes that certain 'abstract' mathematics-like concepts do exist, yet the mathematics we construct and develop as humans are only approximations of those real concepts, approximations shaped by our senses and perception, then what is one called?
I looked it up, and it seems like a mix of platonism and kant's philosophy?
It's called a search for noumenal waifs by Hilary Putnam in
Putnam, Hilary Models and reality. J. Symbolic Logic 45 (1980), no. 3, 464-482.