:: the Turing combinator is the same worm eventually
:: self-multiplication of the K combinator
:: self-multiplication of the B combinator
:: the correct self-multiplication of the S combinator
:: the siamese Omega combinator
:: the correct self-multiplication of the Omega combinator
:: the Omega combinator reductions
:: pred(3)=2
:: the YK chain
:: KAB
:: a zipper
:: a set