Def Y(f) == (x.f(x(x)))(x.f(x(x)))

is mentioned by

Def pred(e) Def == if isnull(a(loc(e);time(e)-1)) pred(<loc(e),time(e)-1>) Def == else <loc(e),time(e)-1> fi Def (recursive)	[w-pred]
Def first(e) Def == if time(e)=0 true Def == i; isnull(a(loc(e);time(e)-1)) first(<loc(e),time(e)-1>) Def == else false fi Def (recursive)	[w-first]
Def before(e) == if first(e) nil else before(pred(e)) @ [pred(e)] fi Def (recursive)	[es-before]

In prior sections: list 1 mb nat mb list 1 num thy 1 mb event system 1

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