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本文针对某些高等学校数学系使用的教材、参考书、以及数学教育界流传的关于命题的一些问题,提出一些看法:(1)“命题”概念要明确。(2)“命题”的真值要以事物本身可确定真假而定,不应要求立刻就定或大家有一致意见才定。(3)命题的结构是:主词、宾词、系词(有时还加上量词)。而不应一概说成“若 A 则 B”。(4)命题“若 A 则 B ”的否定命题不是“若 A 则”而是“若 A 且”。(5)逆命题制造方法有两个,都是正确的。
In this paper, some colleges and universities in mathematics teaching materials, reference books, as well as the mathematical education spread some of the issues on the proposition, put forward some views: (1) “proposition” concept to be clear. (2) The true value of “Proposition” should be determined by the fact itself, and should not be required immediately or agreed upon by everyone. (3) Proposition structure is: the subject, guest words, Department of words (sometimes with quantifiers). It should not be generalized as “if A is B”. (4) The proposition “if A then B” is not “if A is” but “if A and”. (5) Inverse Proposition There are two manufacturing methods, all of which are correct.