De Morgan's laws

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De Morgan's laws

pl n

(Philosophy / Logic) (in formal logic and set theory) the principles that conjunction and disjunction, or union and intersection, are dual. Thus the negation of P & Q is equivalent to not-P or not-Q

[named after Augustus De Morgan (1806-71), British mathematician]

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He formulated De Morgan's laws and was the first to introduce the term, and make rigorous the idea of mathematical induction.

Equations from God; pure mathematics and Victorian faith by Reference & Research Book News

He formulated De Morgan's laws and was the first to introduce the term, and make rigorous the idea of mathematical induction.

Scrapbook by Prochazka, Helen / Australian Mathematics Teacher

He formulated De Morgan's laws and was the first to introduce the term, and make rigorous the idea of mathematical induction.

In thrall to Mesmer; Going under: Hypnosis, formerly known as animal ... by The Daily Mail (London, England)

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