Nuprl - Some Definitions

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	Some definitions of interest.

assoced	Def a ~ b == a \| b & b \| a

	Thm* a,b:. (a ~ b) Prop

iff	Def P Q == (P Q) & (P Q)

	Thm* A,B:Prop. (A B) Prop

int_nzero	Def == {i:\| i 0 }

	Thm* Type

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