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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 algebra - Wikipedia

    en.wikipedia.org/wiki/Symmetric_algebra

    The key difference is that the symmetric algebra of an affine space is not a graded algebra, but a filtered algebra: one can determine the degree of a polynomial on an affine space, but not its homogeneous parts. For instance, given a linear polynomial on a vector space, one can determine its constant part by evaluating at 0.

  4. Pencil (geometry) - Wikipedia

    en.wikipedia.org/wiki/Pencil_(geometry)

    When described algebraically, it is possible that the equations may admit imaginary solutions. The types are: An elliptic pencil (red family of circles in the figure) is defined by two generators that pass through each other in exactly two points. Every circle of an elliptic pencil passes through the same two points.

  5. Lie point symmetry - Wikipedia

    en.wikipedia.org/wiki/Lie_point_symmetry

    Lie point symmetry is a concept in advanced mathematics. Towards the end of the nineteenth century, Sophus Lie introduced the notion of Lie group in order to study the solutions of ordinary differential equations [ 1 ] [ 2 ] [ 3 ] (ODEs).

  6. Elementary symmetric polynomial - Wikipedia

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

    The lemma shows that all these products have different leading monomials, and this suffices: if a nontrivial linear combination of the e λ t (X 1, ..., X n) were zero, one focuses on the contribution in the linear combination with nonzero coefficient and with (as polynomial in the variables X i) the largest leading monomial; the leading term ...

  7. Algebraic geometry - Wikipedia

    en.wikipedia.org/wiki/Algebraic_geometry

    Algebraic geometry is a branch of mathematics which uses abstract algebraic techniques, mainly from commutative algebra, to solve geometrical problems.Classically, it studies zeros of multivariate polynomials; the modern approach generalizes this in a few different aspects.

  8. 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.

  9. Noether's theorem - Wikipedia

    en.wikipedia.org/wiki/Noether's_theorem

    A researcher can calculate the types of Lagrangians that conserve X through a continuous symmetry. Due to Noether's theorem, the properties of these Lagrangians provide further criteria to understand the implications and judge the fitness of the new theory.

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