Different ways to implement Fibonacci numbers, for comparisons and other reserch.
Jupyter book requiers Sympy library, the isiest way is to install Jupyter with Anaconda.
HTML export file from Jupyter book provided.
$ erl
> c(fibonacci).
> fibonacci:fib_inefficient(15).
987
> fibonacci:fib_inefficient_spawn(15).
987
> fibonacci:fib_td(15).
987
> fibonacci:fib_bu(15).
987
> fibonacci:fib_bu_spawn(15).
987