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Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [2] and released to the public in January 2007. [3] Quizlet's primary products include digital flash cards , matching games , practice electronic assessments , and live quizzes.
Furthermore, a module with no proper essential extension (that is, if the module is essential in another module, then it is equal to that module) is an injective module. It is then possible to prove that every module M has a maximal essential extension E(M), called the injective hull of M. The injective hull is necessarily an injective module ...
This allows the user to download the file in pieces, then combine the pieces after a completed download. This increases the download speed when connected to a slow server. [ 5 ] It has Metalink support, which allows multiple URLs for each file to be used, along with checksums and other information about the content. [ 5 ]
An extension of A by B is called split if it is equivalent to the trivial extension 0 → B → A ⊕ B → A → 0. {\displaystyle 0\to B\to A\oplus B\to A\to 0.} There is a one-to-one correspondence between equivalence classes of extensions of A by B and elements of Ext 1
In June 2006, the W3C rechartered the MathML Working Group to produce a MathML 3 Recommendation until February 2008, and in November 2008 extended the charter to April 2010. A sixth Working Draft of the MathML 3 revision was published in June 2009. On 10 August 2010 version 3 graduated to become a "Proposed Recommendation" rather than a draft. [9]
Extension of a function, defined on a larger domain; Extension of a polyhedron, in geometry; Extension of a line segment (finite) into an infinite line (e.g., extended base) Exterior algebra, Grassmann's theory of extension, in geometry; Field extension, in Galois theory; Group extension, in abstract algebra and homological algebra
The kind of products that use this convention vary widely in complexity. The concept shares some similarities with the type designation (in hardware), also called software versioning: 1.0+ (1.1, 1.12, 2.0, 3.0, etc.), used to designate general software product releases, and other version control schemas. Thus designations like "Mark I", "Mark ...
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