• ## Algebra - Wikipedia, the free encyclopedia

en.wikipedia.org/wiki/Algebra Algebra (from Arabic "al-jabr" meaning "reunion of broken parts" [1]) is one of the broad parts of mathematics, together with number theory, geometry and analysis.
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• ## Coalgebra - Wikipedia, the free encyclopedia

en.wikipedia.org/wiki/Coalgebra Formal definition. Formally, a coalgebra over a field K is a vector space C over K together with K-linear maps Δ: C → C ⊗ C and ε: C → K such that

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• ## Algebra.Help -- Calculators, Lessons, and Worksheets

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• ## Álgebra - Wikipedia, la enciclopedia libre

es.wikipedia.org/wiki/%C3%81lgebra Introducción. A diferencia de la aritmética elemental, que trata de los números y las operaciones fundamentales, en álgebra -para lograr la generalización- se ...