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left exact

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  • Exact functor — In homological algebra, an exact functor is a functor, from some category to another, which preserves exact sequences. Exact functors are very convenient in algebraic calculations, roughly speaking because they can be applied to presentations of… …   Wikipedia

  • Exact category — In mathematics, an exact category is a concept of category theory due to Daniel Quillen which is designed to encapsulate the properties of short exact sequences in abelian categories without requiring that morphisms actually possess kernels and… …   Wikipedia

  • Exact trigonometric constants — Exact constant expressions for trigonometric expressions are sometimes useful, mainly for simplifying solutions into radical forms which allow further simplification.All values of sine, cosine, and tangent of angles with 3° increments are… …   Wikipedia

  • Exact differential — In mathematics, a differential dQ is said to be exact , as contrasted with an inexact differential, if the differentiable function Q exists. However, if dQ is arbitrarily chosen, a corresponding Q might not exist. OverviewIn one dimension, a… …   Wikipedia

  • Exact division — An exact or even division is a type of fair division where all the players believe everyone received the same amount.There is no finite procedure for exact division but there are moving knife procedures for two players. For more than two players… …   Wikipedia

  • Exact solutions in general relativity — In general relativity, an exact solution is a Lorentzian manifold equipped with certain tensor fields which are taken to model states of ordinary matter, such as a fluid, or classical nongravitational fields such as the electromagnetic field.… …   Wikipedia

  • Left Communism in China — In the People s Republic of China since 1967, the terms Ultra Left and left communist (simplified Chinese: 共产主义左翼; traditional Chinese: 共產主義左翼; pinyin: Gòngchǎn zhǔyì zuǒyì) refers to political theory and practice self defined as further left… …   Wikipedia

  • Closed and exact differential forms — In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0), and an exact form is a differential form that is the exterior derivative of another …   Wikipedia

  • Fisher's exact test — is a statistical significance test used in the analysis of categorical data where sample sizes are small. It is named after its inventor, R. A. Fisher, and is one of a class of exact tests. Fisher devised the test following a comment from Muriel… …   Wikipedia

  • The Left Hand of Darkness — infobox Book | name = The Left Hand of Darkness title orig = translator = image caption = Cover of first edition paperback author = Ursula K. Le Guin illustrator = cover artist = country = United States language = English series = Hainish Cycle… …   Wikipedia

  • Back and to the left — is a phrase originating from the 1991 Oliver Stone movie JFK about the assassination of John F. Kennedy, 35th President of the United States. In the movie, Jim Garrison, played by Kevin Costner, screens the Zapruder film to a jury, pausing and… …   Wikipedia

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