逻辑断言

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP




逻辑断言（英语：Logical assertion）是断定一个特定前提为真的陈述，并且对在证明中的陈述有用。它等价于有空前件的相继式。


例如，如果 p = "x 是偶数"，则蕴涵


(⊢p)→xmod2=0displaystyle (vdash p)rightarrow xbmod 2=0displaystyle (vdash p)rightarrow xbmod 2=0

因此为真。我们还可以使用逻辑断言符号写为


⊢(⊢p)→xmod2=0displaystyle vdash (vdash p)rightarrow xbmod 2=0displaystyle vdash (vdash p)rightarrow xbmod 2=0


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