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  2. Quadratic function - Wikipedia

    en.wikipedia.org/wiki/Quadratic_function

    To convert the standard form to factored form, one needs only the quadratic formula to determine the two roots r 1 and r 2. To convert the standard form to vertex form, one needs a process called completing the square. To convert the factored form (or vertex form) to standard form, one needs to multiply, expand and/or distribute the factors.

  3. Vertex operator algebra - Wikipedia

    en.wikipedia.org/wiki/Vertex_operator_algebra

    This is the generating function for partitions, and is also written as q 1/24 times the weight −1/2 modular form 1/η (the reciprocal of the Dedekind eta function). The rank n free boson then has an n parameter family of Virasoro vectors, and when those parameters are zero, the character is q n/24 times the weight −n/2 modular form η −n.

  4. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  5. Tree (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Tree_(graph_theory)

    In a rooted tree, the parent of a vertex v is the vertex connected to v on the path to the root; every vertex has a unique parent, except the root has no parent. [24] A child of a vertex v is a vertex of which v is the parent. [24] An ascendant of a vertex v is any vertex that is either the parent of v or is (recursively) an ascendant of a ...

  6. Quadratic form - Wikipedia

    en.wikipedia.org/wiki/Quadratic_form

    A quadratic form over a field K is a map q : V → K from a finite-dimensional K-vector space to K such that q(av) = a 2 q(v) ...

  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. Gamma matrices - Wikipedia

    en.wikipedia.org/wiki/Gamma_matrices

    The defining property for the gamma matrices to generate a Clifford algebra is the anticommutation relation {,} = + = ,where the curly brackets {,} represent the anticommutator, is the Minkowski metric with signature (+ − − −), and is the 4 × 4 identity matrix.

  9. Inversive geometry - Wikipedia

    en.wikipedia.org/wiki/Inversive_geometry

    To construct the inverse P ' of a point P outside a circle Ø: . Draw the segment from O (center of circle Ø) to P.; Let M be the midpoint of OP. (Not shown) Draw the circle c with center M going through P.