De Morgan ê hoat-chek
Guā-māu
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Demorganlaws.svg/220px-Demorganlaws.svg.png)
De Morgan ê hoat-chek (Eng. De Morgan's laws) sī koan-î bīng-tē lô-chi̍p ê chi̍t-tùi hoat-chek, i hō· Eng-kok ê sò·-ha̍k-ka Augustus de Morgan hoat-hiān.
Lōe-iông
[siu-kái | kái goân-sí-bé]Tī chi̍p-ha̍p lāi-té:
Kái-soeh
[siu-kái | kái goân-sí-bé]Lán kah kun-kù ki-pún bēng-tê p, q ê līm-ì bēng-tê sǹg-hû P(o,q,...) ê tùi-giô tēng-gī chò: