You can generally approximate the fixed point. You can possibly do this to arbitrary precision, but I'm not sure.
This is useful for practical applications, but it's not the same as knowing the fixed point for mathematical applications.
E.g. you may want to prove that some function preserves the irrational number pi. But you may not be able to prove it, only show that computations make your conjecture more and more likely.
This is useful for practical applications, but it's not the same as knowing the fixed point for mathematical applications.
E.g. you may want to prove that some function preserves the irrational number pi. But you may not be able to prove it, only show that computations make your conjecture more and more likely.