De Morgan's law love

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De Morgan's law


from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Either of two laws in formal logic which state that:
  • n. Either of two laws in set theory which state that:
  • n. Any of various laws similar to De Morgan’s laws for set theory and logic; for example:β€ƒΒ¬βˆ€π‘₯ 𝑃(π‘₯) ⇔ βˆƒπ‘₯ ¬𝑃(π‘₯)


Named after its eponym, the British mathematician and logician Augustus De Morgan (1806–1871), who first formulated the laws in formal propositional logic. (Wiktionary)


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