Inter-universal Teichmuller Theory I ------------------------------------ ESlightly modified Remark 2.5.3, (ii), (E5), (E7) ECorrected a misprint ("base-theoretic" ---> "base-field-theoretic") in Example 3.2, (iii) Inter-universal Teichmuller Theory II ------------------------------------- ECorrected a misprint ("base-theoretic" ---> "base-field-theoretic") in Example 3.2, (ii)