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  2. Symmetric polynomial - Wikipedia

    en.wikipedia.org/wiki/Symmetric_polynomial

    this expression is unique up to equivalence of polynomial expressions; if P has integral coefficients, then the polynomial expression also has integral coefficients. For example, for n = 2, the relevant elementary symmetric polynomials are e 1 (X 1, X 2) = X 1 + X 2, and e 2 (X 1, X 2) = X 1 X 2. The first polynomial in the list of examples ...

  3. 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

  4. Quadratic formula - Wikipedia

    en.wikipedia.org/wiki/Quadratic_formula

    The roots of the quadratic function y = ⁠ 1 / 2 ⁠ x 2 − 3x + ⁠ 5 / 2 ⁠ are the places where the graph intersects the x-axis, the values x = 1 and x = 5. They can be found via the quadratic formula. In elementary algebra, the quadratic formula is a closed-form expression describing the solutions of a quadratic equation.

  5. Symmetry in mathematics - Wikipedia

    en.wikipedia.org/wiki/Symmetry_in_mathematics

    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 explicitly calculate a set of first integrals, yielding a complete solution without integration.

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    A Rorschach test is a figure invariant by this symmetry, [203] as are butterfly and animal bodies more generally (at least on the surface). [204] Waves on the sea surface possess translation symmetry: moving one's viewpoint by the distance between wave crests does not change one's view of the sea. [205] Fractals possess self-similarity. [206] [207]

  7. Symmetry operation - Wikipedia

    en.wikipedia.org/wiki/Symmetry_operation

    In mathematics, a symmetry operation is a geometric transformation of an object that leaves the object looking the same after it has been carried out. For example, a 1 ⁄ 3 turn rotation of a regular triangle about its center, a reflection of a square across its diagonal, a translation of the Euclidean plane, or a point reflection of a sphere through its center are all symmetry operations.

  8. AOL Mail Help - AOL Help

    help.aol.com/products/new-aol-mail

    You've Got Mail!® Millions of people around the world use AOL Mail, and there are times you'll have questions about using it or want to learn more about its features. That's why AOL Mail Help is here with articles, FAQs, tutorials, our AOL virtual chat assistant and live agent support options to get your questions answered.

  9. Parabola - Wikipedia

    en.wikipedia.org/wiki/Parabola

    The point E is an arbitrary point on the parabola. The focus is F, the vertex is A (the origin), and the line FA is the axis of symmetry. The line EC is parallel to the axis of symmetry, intersects the x axis at D and intersects the directrix at C. The point B is the midpoint of the line segment FC.

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