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  • Equivalence class — This article is about equivalency in mathematics; for equivalency in music see equivalence class (music). In mathematics, given a set X and an equivalence relation on X, the equivalence class of an element a in X is the subset of all elements in… …   Wikipedia

  • Equivalence relation — In mathematics, an equivalence relation is a binary relation between two elements of a set which groups them together as being equivalent in some way. Let a , b , and c be arbitrary elements of some set X . Then a b or a ≡ b denotes that a is… …   Wikipedia

  • Equivalence point — or stoichiometric point occurs during a chemical titration when the amount of titrant added is equivalent, or equal, to the amount of analyte present in the sample. In some cases there are multiple equivalence points which are multiples of the… …   Wikipedia

  • Equivalence partitioning — is a software testing related technique with the goal: #To reduce the number of test cases to a necessary minimum. #To select the right test cases to cover all possible scenarios. Although in rare cases equivalence partitioning is also applied to …   Wikipedia

  • Equivalence of Direct Radiation — (EDR) is a standardized comparison method for estimating the output ability of space heating radiators and convectors.Measured in square feet, the reference standard for EDR is the [http://www.heatinghelp.com/newsletter.cfm?Id=157 mattress… …   Wikipedia

  • Equivalence of categories — In category theory, an abstract branch of mathematics, an equivalence of categories is a relation between two categories that establishes that these categories are essentially the same . There are numerous examples of categorical equivalences… …   Wikipedia

  • Equivalence principle — General relativity|cTopic=Fundamental conceptsThe equivalence principle is one of the fundamental background concepts of the General Theory of Relativity. For the overall context, see General relativity.In the physics of relativity, the… …   Wikipedia

  • Equivalence (measure theory) — In mathematics, and specifically in measure theory, equivalence is a notion of two measures being the same . Two measures are equivalent if they have the same null sets.DefinitionLet ( X , Σ) be a measurable space, and let μ , ν : Σ → [0, +∞] be… …   Wikipedia

  • Equivalence group — The term equivalence group is used in developmental biology to describe a subset of incompletely differentiated cells that are each able to adopt the same cellular fates. This means that any one cell in an equivalence group has the potential to… …   Wikipedia

  • equivalence — /i kwiv euh leuhns/ or, for 3, /ee kweuh vay leuhns/, n. 1. the state or fact of being equivalent; equality in value, force, significance, etc. 2. an instance of this; an equivalent. 3. Chem. the quality of having equal valence. 4. Logic, Math. a …   Universalium

  • equivalence class — noun Any one of the subsets into which an equivalence relation partitions a set, each of these subsets containing all the elements of the set that are equivalent under the equivalence relation …   Wiktionary

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