“关于本原代数的Kroneker积的结构”一文中三个定理的简捷证明

The Concise Proof to three Theorems in the Thesis "About the Structure of Kronecker Product of Primitive Algebra

刊在中国科学A辑1984年第1期上许永华教授的论文“关于本原代数的Kro-necker积的结构”，该文中罗列了几个定理．本文对其中的定理2、3、4给出了一种新的简捷的证明．

Professor Xuyonhua's thesis 'About the structure of kronecker product of primitive algebra' Published on 'Chinese Science'. Issue 1, compilation A, 1984, has listed several theorems and this article produces a kind of new and concise proof to Theorem 2 and Theorem 3 and Theorem 4.