The fixed point of any function f = f (f (f (f .... so for f(x)=1+x it is 1+ (1+ (1+ (1+ ... , an infinite sum. This is correct in the sense that 1 + infinity

The fixed point of any function f = f (f (f (f .... so for f(x)=1+x it is 1+ (1+ (1+ (1+ ... , an infinite sum. This is correct in the sense that 1 + infinity = infinity, but in practice this could result in an infinite loop or stack overflow. For f(x)=x+1 it's the reverse ...) +1) +1) +1 which behaves similarly.