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YANG Zong-wen, YANG Zhu-yuan. The sum and product of subringsJ. Journal of Yunnan University: Natural Sciences Edition, 2007, 29(4): 335-338.
Citation: YANG Zong-wen, YANG Zhu-yuan. The sum and product of subringsJ. Journal of Yunnan University: Natural Sciences Edition, 2007, 29(4): 335-338.
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The sum and product of subrings

    Abstract
  • The structures of the subring generated by a subset of a ring,the structures of sum and product of subrings,the distribution product over the sum of subrings are discovered,it is showen that the class of associative rings is a class of complete algebras and a class of product algebras,so it is a normal class of complete algebras and a normal class of product algebras.
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