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  2. Mathematics education in the United States - Wikipedia

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

    e. Mathematics education in the United States varies considerably from one state to the next, and even within a single state. However, with the adoption of the Common Core Standards in most states and the District of Columbia beginning in 2010, mathematics content across the country has moved into closer agreement for each grade level.

  3. Free Lie algebra - Wikipedia

    en.wikipedia.org/wiki/Free_Lie_algebra

    The universal enveloping algebra of a free Lie algebra on a set X is the free associative algebra generated by X.By the Poincaré–Birkhoff–Witt theorem it is the "same size" as the symmetric algebra of the free Lie algebra (meaning that if both sides are graded by giving elements of X degree 1 then they are isomorphic as graded vector spaces).

  4. Lie group action - Wikipedia

    en.wikipedia.org/wiki/Lie_group_action

    An infinitesimal Lie algebra action () is injective if and only if the corresponding global Lie group action is free. This follows from the fact that the kernel of d e σ x : g → T x M {\displaystyle \mathrm {d} _{e}\sigma _{x}\colon {\mathfrak {g}}\to T_{x}M} is the Lie algebra g x ⊆ g {\displaystyle {\mathfrak {g}}_{x}\subseteq {\mathfrak ...

  5. Pearson Education - Wikipedia

    en.wikipedia.org/wiki/Pearson_Education

    Pearson Education, known since 2011 as simply Pearson, is the educational publishing and services subsidiary of the international corporation Pearson plc. The subsidiary was formed in 1998, when Pearson plc acquired Simon & Schuster 's educational business and combined it with Pearson's existing education company Addison-Wesley Longman. [1]

  6. Lie algebra cohomology - Wikipedia

    en.wikipedia.org/wiki/Lie_algebra_cohomology

    In mathematics, Lie algebra cohomology is a cohomology theory for Lie algebras. It was first introduced in 1929 by Élie Cartan to study the topology of Lie groups and homogeneous spaces [1] by relating cohomological methods of Georges de Rham to properties of the Lie algebra. It was later extended by Claude Chevalley and Samuel Eilenberg (1948 ...

  7. Algebraic structure - Wikipedia

    en.wikipedia.org/wiki/Algebraic_structure

    t. e. In mathematics, an algebraic structure consists of a nonempty set A (called the underlying set, carrier set or domain), a collection of operations on A (typically binary operations such as addition and multiplication), and a finite set of identities (known as axioms) that these operations must satisfy. An algebraic structure may be based ...

  8. Free object - Wikipedia

    en.wikipedia.org/wiki/Free_object

    In mathematics, the idea of a free object is one of the basic concepts of abstract algebra.Informally, a free object over a set A can be thought of as being a "generic" algebraic structure over A: the only equations that hold between elements of the free object are those that follow from the defining axioms of the algebraic structure.

  9. Library Genesis - Wikipedia

    en.wikipedia.org/wiki/Library_Genesis

    File sharing. Library Genesis (LibGen) is a shadow library project for file-sharing access to scholarly journal articles, academic and general-interest books, images, comics, audiobooks, and magazines. The site enables free access to content that is otherwise paywalled or not digitized elsewhere. [1] LibGen describes itself as a "links ...

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