等值命题 biconditional proposition; equivalence proposition; equivalent propositions 多维命题 multidimensional statement .
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This paper explains the proposition and propositional logic, giving the definitions, forms and usages of negation, conjunction, disjunction, implication and equivalence.
解释命题、命题逻辑和其涉及的否定、合取、析取、蕴涵和等价等定义，同时分析它们的形式和用法。
This paper promotes the proposition on asking the limit with equivalence infinite small quantity instead of theorem.
对用等价无穷小量代换定理求极限进行了推广。
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