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  2. Plotting algorithms for the Mandelbrot set - Wikipedia

    en.wikipedia.org/wiki/Plotting_algorithms_for...

    Analogous to the exterior case, once b is found, we know that all points within the distance of b/4 from c are inside the Mandelbrot set. There are two practical problems with the interior distance estimate: first, we need to find z 0 {\displaystyle z_{0}} precisely, and second, we need to find p {\displaystyle p} precisely.

  3. Logistic map - Wikipedia

    en.wikipedia.org/wiki/Logistic_map

    The two intersection points are (, +) = (,) and (, +) = (,), and the positions of these intersection points are constant and do not depend on the value of r. An example of a spider web projection of a trajectory on the graph of the logistic map, and the locations of the fixed points x f 1 {\displaystyle x_{f1}} and x f 2 {\displaystyle x_{f2 ...

  4. Julia set - Wikipedia

    en.wikipedia.org/wiki/Julia_set

    is the smallest closed set containing at least three points which is completely invariant under f. ⁡ is the closure of the set of repelling periodic points. For all but at most two points , the Julia set is the set of limit points of the full backwards orbit (). (This suggests a simple algorithm for plotting Julia sets, see below.)

  5. Indicator function - Wikipedia

    en.wikipedia.org/wiki/Indicator_function

    In classical mathematics, characteristic functions of sets only take values 1 (members) or 0 (non-members). In fuzzy set theory, characteristic functions are generalized to take value in the real unit interval [0, 1], or more generally, in some algebra or structure (usually required to be at least a poset or lattice).

  6. Projections onto convex sets - Wikipedia

    en.wikipedia.org/wiki/Projections_onto_convex_sets

    In mathematics, projections onto convex sets (POCS), sometimes known as the alternating projection method, is a method to find a point in the intersection of two closed convex sets. It is a very simple algorithm and has been rediscovered many times. [1] The simplest case, when the sets are affine spaces, was analyzed by John von Neumann.

  7. Weierstrass function - Wikipedia

    en.wikipedia.org/wiki/Weierstrass_function

    Rather between any two points no matter how close, the function will not be monotone. The computation of the Hausdorff dimension D {\textstyle D} of the graph of the classical Weierstrass function was an open problem until 2018, while it was generally believed that D = 2 + log b ⁡ ( a ) < 2 {\textstyle D=2+\log _{b}(a)<2} .

  8. Convex optimization - Wikipedia

    en.wikipedia.org/wiki/Convex_optimization

    The feasible set of the optimization problem consists of all points satisfying the inequality and the equality constraints. This set is convex because D {\displaystyle {\mathcal {D}}} is convex, the sublevel sets of convex functions are convex, affine sets are convex, and the intersection of convex sets is convex.

  9. Level-set method - Wikipedia

    en.wikipedia.org/wiki/Level-set_method

    Below it, the red surface is the graph of a level set function determining this shape, and the flat blue region represents the X-Y plane. The boundary of the shape is then the zero-level set of φ {\displaystyle \varphi } , while the shape itself is the set of points in the plane for which φ {\displaystyle \varphi } is positive (interior of ...