英语词汇“De Morgan”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

De Morgan

/də ˈmɔːɡ(ə)n/

Logic and Mathematics

noun

1Attributive and in the genitive, especially in De Morgan's law, De Morgan's theorem. Designating two laws of the propositional calculus, (a) that the negation of a conjunction is logically equivalent to the alternation of the negations of the conjoined expressions, and (b) that the negation of an alternation is logically equivalent to the conjunction of the negations of the alternated expressions.

The laws may be stated symbolically as ∼(p.q) ≡ ∼p ∨ ∼q, and ∼(p ∨ q) ≡ ∼p.∼q, which may be rendered as: (a) if p and q are not jointly true, then p is false or q is false; (b) if neither p nor q is true, then p is false and q is false..

2= De Morgan's theorem.

Origin

Early 20th century; earliest use found in Mind. From the name of Augustus De Morgan, English mathematician, who formulated the laws, although they were known to medieval writers such as William of Ockham (Summa logicae).

单词	De Morgan
释义	De Morgan /də ˈmɔːɡ(ə)n/ Logic and Mathematics noun 1Attributive and in the genitive, especially in De Morgan's law, De Morgan's theorem. Designating two laws of the propositional calculus, (a) that the negation of a conjunction is logically equivalent to the alternation of the negations of the conjoined expressions, and (b) that the negation of an alternation is logically equivalent to the conjunction of the negations of the alternated expressions. The laws may be stated symbolically as ∼(p.q) ≡ ∼p ∨ ∼q, and ∼(p ∨ q) ≡ ∼p.∼q, which may be rendered as: (a) if p and q are not jointly true, then p is false or q is false; (b) if neither p nor q is true, then p is false and q is false.. 2= De Morgan's theorem. Origin Early 20th century; earliest use found in Mind. From the name of Augustus De Morgan, English mathematician, who formulated the laws, although they were known to medieval writers such as William of Ockham (Summa logicae).
随便看	massacre Massacre of St Bartholomew massacrous mass action massa day massage massage oil massage parlour massager massage someone's ego Massagetae massage therapist massage therapy massagist massak massal massalgee Massalian Massaliot Massaliote massasauga Massasoit Massawa mass balance mass-balancing