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  2. Injective cogenerator - Wikipedia

    en.wikipedia.org/wiki/Injective_cogenerator

    The cogenerator Q/Z is useful in the study of modules over general rings. If H is a left module over the ring R, one forms the (algebraic) character module H* consisting of all abelian group homomorphisms from H to Q/Z. H* is then a right R-module. Q/Z being a cogenerator says precisely that H* is 0 if and only if H is 0. Even more is true: the ...

  3. Big Ideas Learning - Wikipedia

    en.wikipedia.org/wiki/Big_Ideas_Learning

    Big Ideas Learning develops and publishes mathematics textbooks. The name of the company is related to the 2006 "Focal Point" recommendations of the National Council of Teachers of Mathematics. [4] In September 2006, NCTM released Curriculum Focal Points for Prekindergarten through Grade 8 Mathematics: A Quest for Coherence. In the Focal Points ...

  4. Mathematics education in the United States - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education_in...

    Mathematics education has been a topic of debate among academics, parents, as well as educators. [4] [9] [195] [38] Majorities agree that mathematics is crucial, but there has been many divergent opinions on what kind of mathematics should be taught and whether relevance to the "real world" or rigor should be emphasized.

  5. Houghton Mifflin Harcourt - Wikipedia

    en.wikipedia.org/wiki/Houghton_Mifflin_Harcourt

    Houghton Mifflin Harcourt Company (/ ˈ h oʊ t ən / HOH-tən; [9] HMH) is an American publisher of textbooks, instructional technology materials, assessments, and reference works. The company is based in the Boston Financial District .

  6. American Invitational Mathematics Examination - Wikipedia

    en.wikipedia.org/wiki/American_Invitational...

    The American Invitational Mathematics Examination (AIME) is a selective and prestigious 15-question 3-hour test given since 1983 to those who rank in the top 5% on the AMC 12 high school mathematics examination (formerly known as the AHSME), and starting in 2010, those who rank in the top 2.5% on the AMC 10. Two different versions of the test ...

  7. Composition series - Wikipedia

    en.wikipedia.org/wiki/Composition_series

    In abstract algebra, a composition series provides a way to break up an algebraic structure, such as a group or a module, into simple pieces.The need for considering composition series in the context of modules arises from the fact that many naturally occurring modules are not semisimple, hence cannot be decomposed into a direct sum of simple modules.

  8. Hom functor - Wikipedia

    en.wikipedia.org/wiki/Hom_functor

    Hom(A, –) : C → SetHom(–, B) : C → Set [1] This is a covariant functor given by: . Hom(A, –) maps each object X in C to the set of morphisms, Hom(A, X)Hom(A, –) maps each morphism f : X → Y to the function

  9. MathML - Wikipedia

    en.wikipedia.org/wiki/MathML

    Following some experiments in the Arena browser based on proposals for mathematical markup in HTML, [4] MathML 1 was released as a W3C recommendation in April 1998 as the first XML language to be recommended by the W3C. Version 1.01 of the format was released in July 1999 and version 2.0 appeared in February 2001.

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