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  2. Symmetry in mathematics - Wikipedia

    en.wikipedia.org/wiki/Symmetry_in_mathematics

    A Line symmetry of a system of differential equations is a continuous symmetry of the system of differential equations. Knowledge of a Line symmetry can be used to simplify an ordinary differential equation through reduction of order. [8] For ordinary differential equations, knowledge of an appropriate set of Lie symmetries allows one to ...

  3. Symmetric polynomial - Wikipedia

    en.wikipedia.org/wiki/Symmetric_polynomial

    One context in which symmetric polynomial functions occur is in the study of monic univariate polynomials of degree n having n roots in a given field.These n roots determine the polynomial, and when they are considered as independent variables, the coefficients of the polynomial are symmetric polynomial functions of the roots.

  4. Symmetric algebra - Wikipedia

    en.wikipedia.org/wiki/Symmetric_algebra

    Therefore, the symmetric algebra over V can be viewed as a "coordinate free" polynomial ring over V. The symmetric algebra S(V) can be built as the quotient of the tensor algebra T(V) by the two-sided ideal generated by the elements of the form x ⊗ y − y ⊗ x.

  5. Elementary symmetric polynomial - Wikipedia

    en.wikipedia.org/wiki/Elementary_symmetric...

    In mathematics, specifically in commutative algebra, the elementary symmetric polynomials are one type of basic building block for symmetric polynomials, in the sense that any symmetric polynomial can be expressed as a polynomial in elementary symmetric polynomials.

  6. Lie point symmetry - Wikipedia

    en.wikipedia.org/wiki/Lie_point_symmetry

    The following theorem (see th. 2.8 in ch.2 of [5]) gives necessary and sufficient conditions so that a local Lie group is a symmetry group of an algebraic system. Theorem . Let G {\displaystyle G} be a connected local Lie group of a continuous dynamical system acting in the n-dimensional space R n {\displaystyle \mathbb {R} ^{n}} .

  7. Killing vector field - Wikipedia

    en.wikipedia.org/wiki/Killing_vector_field

    Heuristically, we can derive the dimension of the Killing field algebra. Treating Killing's equation + = together with the identity ⁠ = ⁠. as a system of second order differential equations for ⁠ ⁠, we can determine the value of at any point given initial data at a point ⁠ ⁠.

  8. Symmetric function - Wikipedia

    en.wikipedia.org/wiki/Symmetric_function

    Given any function in variables with values in an abelian group, a symmetric function can be constructed by summing values of over all permutations of the arguments. . Similarly, an anti-symmetric function can be constructed by summing over even permutations and subtracting the sum over odd permut

  9. Abel–Ruffini theorem - Wikipedia

    en.wikipedia.org/wiki/Abel–Ruffini_theorem

    An algebraic solution of the initial polynomial equation exists if and only if there exists such a sequence of fields such that contains a solution. For having normal extensions, which are fundamental for the theory, one must refine the sequence of fields as follows.

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