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  2. Hyperfinite type II factor - Wikipedia

    en.wikipedia.org/wiki/Hyperfinite_type_II_factor

    When n=2, this is also sometimes called the Clifford algebra of an infinite separable Hilbert space. If p is any non-zero finite projection in a hyperfinite von Neumann algebra A of type II, then pAp is the hyperfinite type II 1 factor. Equivalently the fundamental group of A is the group of positive real numbers. This can often be hard to see ...

  3. Alternative algebra - Wikipedia

    en.wikipedia.org/wiki/Alternative_algebra

    Artin's theorem states that in an alternative algebra the subalgebra generated by any two elements is associative. [4] Conversely, any algebra for which this is true is clearly alternative. It follows that expressions involving only two variables can be written unambiguously without parentheses in an alternative algebra.

  4. Alternating multilinear map - Wikipedia

    en.wikipedia.org/wiki/Alternating_multilinear_map

    In mathematics, more specifically in multilinear algebra, an alternating multilinear map is a multilinear map with all arguments belonging to the same vector space (for example, a bilinear form or a multilinear form) that is zero whenever any pair of its arguments is equal.

  5. Xcas - Wikipedia

    en.wikipedia.org/wiki/Xcas

    Xcas is a user interface to Giac, which is an open source [2] computer algebra system (CAS) for Windows, macOS and Linux among many other platforms. Xcas is written in C++ . [ 3 ] Giac can be used directly inside software written in C++.

  6. Alternating algebra - Wikipedia

    en.wikipedia.org/wiki/Alternating_algebra

    In mathematics, an alternating algebra is a Z-graded algebra for which xy = (−1) deg(x)deg(y) yx for all nonzero homogeneous elements x and y (i.e. it is an anticommutative algebra) and has the further property that x 2 = 0 for every homogeneous element x of odd degree.

  7. Equivalence relation - Wikipedia

    en.wikipedia.org/wiki/Equivalence_relation

    For example, the natural numbers 2 and 6 have a common factor greater than 1, and 6 and 3 have a common factor greater than 1, but 2 and 3 do not have a common factor greater than 1. The empty relation R (defined so that aRb is never true) on a set X is vacuously symmetric and transitive; however, it is not reflexive (unless X itself is empty).

  8. Factorization of polynomials - Wikipedia

    en.wikipedia.org/wiki/Factorization_of_polynomials

    If two or more factors of a polynomial are identical, then the polynomial is a multiple of the square of this factor. The multiple factor is also a factor of the polynomial's derivative (with respect to any of the variables, if several). For univariate polynomials, multiple factors are equivalent to multiple roots (over a suitable extension field).

  9. Factorization - Wikipedia

    en.wikipedia.org/wiki/Factorization

    The polynomial x 2 + cx + d, where a + b = c and ab = d, can be factorized into (x + a)(x + b). In mathematics, factorization (or factorisation, see English spelling differences) or factoring consists of writing a number or another mathematical object as a product of several factors, usually smaller or simpler objects of the same kind.