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disjunction

A Dictionary of Computing | 2004 | | Copyright

disjunction A logical expression of the form a₁ ∨ a₂ ∨ … ∨ a_n

where ∨ is the OR operation. A particular disjunction of interest is the disjunctive normal form of a Boolean expression involving n variables, x₁, x₂,…, x_n. Each a_i is then of the form (y₁ ∧ y₂ ∧ … y_n)

where ∧ is the AND operation and each y_i is equal to x_i or the complement of x_i. Reducing expressions to disjunctive normal form provides a ready method of determining the equivalence of two Boolean expressions. See also propositional calculus. Compare conjunction.

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JOHN DAINTITH. "disjunction." A Dictionary of Computing. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

JOHN DAINTITH. "disjunction." A Dictionary of Computing. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O11-disjunction.html

JOHN DAINTITH. "disjunction." A Dictionary of Computing. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O11-disjunction.html

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disjunction

A Dictionary of Plant Sciences | 1998 | | Copyright

disjunction The separation of homologous chromosomes at the anaphase stage of mitosis and meiosis, and movement towards the poles of the nuclear spindle.

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MICHAEL ALLABY. "disjunction." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "disjunction." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O7-disjunction.html

MICHAEL ALLABY. "disjunction." A Dictionary of Plant Sciences. 1998. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-disjunction.html

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disjunction

A Dictionary of Zoology | 1999 | | Copyright

disjunction The separation of homologous chromosomes at the anaphase stage of mitosis and meiosis, and movement towards the poles of the nuclear spindle.

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MICHAEL ALLABY. "disjunction." A Dictionary of Zoology. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "disjunction." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O8-disjunction.html

MICHAEL ALLABY. "disjunction." A Dictionary of Zoology. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-disjunction.html

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Free newspaper and magazine articles

	[disjunction] and [conjunction]-sets of generalized topologies.(Report) Magazine article from: Scientia Magna; 1/1/2009
	Distortion and Disjunction in Contemporary American Poetry.(Critical essay) Magazine article from: The American Poetry Review; 3/28/2012
	Disjunction.(Landscape and Legacy) Magazine article from: The Women's Review of Books; 7/1/1999