Inter-universal Teichmuller Theory I
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ECorrected a misprint ("If follows" ---> "It follows") in Remark 1.2.1


Inter-universal Teichmuller Theory III
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ECorrected misprints ("a ring" ---> "the ring", "of characteristic" ---> 
@"of positive characteristic", misplaced definition of "X_k") in Remark
@3.12.4, (v)