في هذا البحث يتابع الباحث أعماله السابقة إذ يقدم تمييزًا جديدًا للفئات شبه الفربنيوسية.
بفرض أن C فئة صغرى سابقة الجمعية, C* الفئة الثنوية لها، فإن التتيجة الأساسية في هذا البحث
هي إثبات تكافؤ الشروط التالية:
١- كل من الفئتين C* و C شبه فربنيوسية.
٢- كل مقاس منبسط على C* أو على C هو مقاس تبايني.
٣- كل مقاس تبايني على C أو على C* هو مقاس اسقاطي.
In this paper, the characterization of right and left quasi-Frobenius
categories, has been given.
Let C be a small preadditive category, C* the dual category of C. It has
shown, that the following conditions are equivalent:
(i) C is right and left quasi-Frobenius;
(ii) All flat C-modules and all flat C*-modules are injective;
(iii) All injective C-modules and all injective C*-modules are projective.
References used
Faith C. Algebra: Rings, modules and categories V. ١ Mir. ١٩٧٩ (in Russian).
Mitchell B. Some applications of module theory to functor categories, Bull, Amer. Math1978
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