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  2. Finite subdivision rule - Wikipedia

    en.wikipedia.org/wiki/Finite_subdivision_rule

    A subdivision rule takes a tiling of the plane by polygons and turns it into a new tiling by subdividing each polygon into smaller polygons. It is finite if there are only finitely many ways that every polygon can subdivide. Each way of subdividing a tile is called a tile type. Each tile type is represented by a label (usually a letter).

  3. Puiseux series - Wikipedia

    en.wikipedia.org/wiki/Puiseux_series

    Puiseux's theorem, sometimes also called the Newton–Puiseux theorem, asserts that, given a polynomial equation (,) = with complex coefficients, its solutions in y, viewed as functions of x, may be expanded as Puiseux series in x that are convergent in some neighbourhood of 0.

  4. Pentagram map - Wikipedia

    en.wikipedia.org/wiki/Pentagram_map

    The pentagram map takes a given polygon, finds the intersections of the shortest diagonals of the polygon, and constructs a new polygon from these intersections. Richard Schwartz introduced the pentagram map for a general polygon in a 1992 paper [ 1 ] though it seems that the special case, in which the map is defined for pentagons only, goes ...

  5. List of polygons - Wikipedia

    en.wikipedia.org/wiki/List_of_polygons

    These segments are called its edges or sides, and the points where two of the edges meet are the polygon's vertices (singular: vertex) or corners. The word polygon comes from Late Latin polygōnum (a noun), from Greek πολύγωνον ( polygōnon/polugōnon ), noun use of neuter of πολύγωνος ( polygōnos/polugōnos , the masculine ...

  6. Pentagon - Wikipedia

    en.wikipedia.org/wiki/Pentagon

    For the pentagon, this results in a polygon whose angles are all (360 − 108) / 2 = 126°. To find the number of sides this polygon has, the result is 360 / (180 − 126) = 6 2 ⁄ 3, which is not a whole number. Therefore, a pentagon cannot appear in any tiling made by regular polygons.

  7. Polygon - Wikipedia

    en.wikipedia.org/wiki/Polygon

    A simple polygon is the boundary of a region of the plane that is called a solid polygon. The interior of a solid polygon is its body, also known as a polygonal region or polygonal area. In contexts where one is concerned only with simple and solid polygons, a polygon may refer only to a simple polygon or to a solid polygon.

  8. Fokas method - Wikipedia

    en.wikipedia.org/wiki/Fokas_method

    Furthermore, for the case that is an arbitrary convex polygon, the global relation can be solved numerically in a straightforward way, for example using MATLAB. Also, for the case that is a convex polygon, the Fokas method constructs an integral representation in the Fourier complex plane. By using this representation together with the global ...

  9. 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.