User blog comment:Swooped me in one hit/ Recursion?/@comment-29310326-20170215212510/@comment-27516045-20170215212831

The basic idea is repeating a function.

Let's say you have a function F that does this:

F(a) = a^a

Then you might make a function G that does this:

G(a) = F(F(...(F(a))...)) for a F's

Then you can repeat, getting a function H that does this:

H(a) = G(G(...(G(a))...)) for n G's

No wlet's say you make F = F_1, G = F_2, H = F_3, and make sequence. Eventually you might make a function K that does this:

K(a) = F_a(a)

And you keep repeating, and making a sequence of functions to make a new stronger funfction.