Who Cites fun exp?
fun_exp	Def f^n == primrec(n;x.x;i,g. f o g)
	Thm* T:Type, n:, f:(TT). f^n  TT
compose	Def (f o g)(x) == f(g(x))
	Thm* A,B,C:Type, f:(BC), g:(AB). f o g  AC
primrec	Def primrec(n;b;c) == if n=0 b else c(n-1,primrec(n-1;b;c)) fi  (recursive)
	Thm* T:Type, n:, b:T, c:(nTT). primrec(n;b;c)  T
eq_int	Def i=j == if i=j true ; false fi
	Thm* i,j:. (i=j)

Syntax:

f^n

has structure:

fun_exp(f; n)

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