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  2. Free algebra - Wikipedia

    en.wikipedia.org/wiki/Free_algebra

    For example, X 1 X 2 does not equal X 2 X 1. More generally, one can construct the free algebra R E on any set E of generators. Since rings may be regarded as Z-algebras, a free ring on E can be defined as the free algebra Z E . Over a field, the free algebra on n indeterminates can be constructed as the tensor algebra on an n-dimensional ...

  3. Playing with Infinity - Wikipedia

    en.wikipedia.org/wiki/Playing_with_Infinity

    Playing with Infinity presents a broad panorama of mathematics for a popular audience. It is divided into three parts, the first of which concerns counting, arithmetic, and connections from numbers to geometry both through visual proofs of results in arithmetic like the sum of finite arithmetic series, and in the other direction through counting problems for geometric objects like the ...

  4. 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.

  5. Outline of algebra - Wikipedia

    en.wikipedia.org/wiki/Outline_of_algebra

    Fundamental theorem of algebra – states that every non-constant single-variable polynomial with complex coefficients has at least one complex root. This includes polynomials with real coefficients, since every real number is a complex number with an imaginary part equal to zero.

  6. Moore method - Wikipedia

    en.wikipedia.org/wiki/Moore_method

    May 2010) (Learn how and when to remove this message) The Moore method is a deductive manner of instruction used in advanced mathematics courses. It is named after Robert Lee Moore , a famous topologist who first used a stronger version of the method at the University of Pennsylvania when he began teaching there in 1911.

  7. Algebra - Wikipedia

    en.wikipedia.org/wiki/Algebra

    Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.

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