a1369209993
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> you want an easy way to express 0,1,2,...,n-1 I'm partial to the viciously set-theoretic[0]: for i in 5: print i # 0;1;2;3;4
0: finite ordinals[1] are 0={},1={{}}={0},2={{},{{}}}={0,1},3={{},{{}},{{},{{}}}}={0,1,2},Sx=x∪{x} - 2237.▲
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