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  2. Sierpiński curve - Wikipedia

    en.wikipedia.org/wiki/Sierpiński_curve

    Sierpiński curves are a recursively defined sequence of continuous closed plane fractal curves discovered by Wacław Sierpiński, which in the limit completely fill the unit square: thus their limit curve, also called the Sierpiński curve, is an example of a space-filling curve.

  3. Arnold invariants - Wikipedia

    en.wikipedia.org/wiki/Arnold_invariants

    The + and invariants keep track of how curves change under these transformations and deformations. The + invariant increases by 2 when a direct self-tangency move creates new self-intersection points (and decreases by 2 when such points are eliminated), while decreases by 2 when an inverse self-tangency move creates new intersections (and increases by 2 when they are eliminated).

  4. List of mathematical shapes - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_shapes

    Name Algebraic Curves ¿ Curves ¿ Curves: Cubic Plane Curve: Quartic Plane Curve: Rational Curves: Degree 2: Conic Section(s) Unit Circle: Unit Hyperbola: Degree 3: Folium of Descartes: Cissoid of Diocles: Conchoid of de Sluze: Right Strophoid: Semicubical Parabola: Serpentine Curve: Trident Curve: Trisectrix of Maclaurin: Tschirnhausen Cubic ...

  5. List of curves - Wikipedia

    en.wikipedia.org/wiki/List_of_curves

    Two Dimensional Curves; Visual Dictionary of Special Plane Curves; Curves and Surfaces Index (Harvey Mudd College) National Curve Bank; An elementary treatise on cubic and quartic curves by Alfred Barnard Basset (1901) online at Google Books

  6. Meander (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Meander_(mathematics)

    Given a fixed line L in the Euclidean plane, a meander of order n is a self-avoiding closed curve in the plane that crosses the line at 2n points. Two meanders are equivalent if one meander can be continuously deformed into the other while maintaining its property of being a meander and leaving the order of the bridges on the road, in the order in which they are crossed, invariant.

  7. Zindler curve - Wikipedia

    en.wikipedia.org/wiki/Zindler_curve

    Figure 1: Zindler curve. Any of the chords of equal length cuts the curve and the enclosed area into halves. Figure 2: Examples of Zindler curves with a = 8 (blue), a = 16 (green) and a = 24 (red). A Zindler curve is a simple closed plane curve with the defining property that: (L) All chords which cut the curve length into halves have the same ...

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  9. Fenchel's theorem - Wikipedia

    en.wikipedia.org/wiki/Fenchel's_theorem

    We reflect across the plane through (), (), and the north pole, forming a closed curve containing antipodal points , with length () = (). A curve connecting ± p {\displaystyle \pm p} has length at least π {\displaystyle \pi } , which is the length of the great semicircle between ± p {\displaystyle \pm p} .