Actually, the solutions are infinite, since skills levels are real numbers -- maybe you should think about it instead...
real numbers on the pc, are you kidding ;) You could be happy about 64 Bit numbers, but i would expect 32 or 16.
What is a "cap formula" anyway?
the formula who determines if a player reach a cap or not, or how much the cap is working ;) In your case, the 5 salary formulas, in my theory 5 slightly different formulas.
Just for the record, I don't have a "theory" about how potential works -- I actually bothered to read the information offered by BB-Charles in the forums when potentials were introduced, and it was pretty clear
this still work with a slightly different formula then the salary one, it is an approximation and i watxch the progress of many all star centers to get to a point where i expect a differen with josef KA formula from 5k where the first skillup get missed betwenn centers with blocking and the ones without ;)
A clear statement looks another way in my eyes, maybe i am wrong maybe i am not.