if for every x in A, the number x+1 is also in A
Let be the collection of alll inductive subsets of R that contain 1.
Then the set of positive integers is defined by the equation
if for every x in A, the number x+1 is also in A
Let be the collection of alll inductive subsets of R that contain 1.
Then the set of positive integers is defined by the equation
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