Fish number 5

Fish number 5 (F5), is a number defined by Japanese googologist Fish in 2003. It is one of Fish numbers.

m(n) map is a function because Fish did it.

Fish function 5 is defined as

\(F_5(x):=((..((m(x)m(x-1))m(x-2))...m(2))m(1))(x)\)

Fish number 5 is defined as \(F_5:=F_5^{63}(3)\)

\(F_5(x) \approx f_{\varepsilon_0}(x)\)

Therefore, Fish Number 5 is greater than Fish Number 3 and approx f_{\varepsilon_0+1}(63).