訂正日: 2006/08/29訂正理由: -訂正箇所: 引用文献情報訂正内容: Right : 1) Sûgaku, vol. 6.1 (July, 1954), Problem 6.1.13. 2) J. Dieudonné, Sur les produits tensoriels, Ann. de l'Ecole Norm. Sup. LXIV(1947), pp. 101-117. Théorème 3. 3) H. Cartan and S. Eilenberg, Homological algebra, Princeton Univ. Press (1956).Prop. VII. 4.5. In the following we shall refer to this book by HA. 4) The author published this result already in Sûtgaku, vol. 8. (1957).