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2. Rotation (mathematics) - Wikipedia

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

   The rotation has two angles of rotation, one for each plane of rotation, through which points in the planes rotate. If these are ω 1 and ω 2 then all points not in the planes rotate through an angle between ω 1 and ω 2. Rotations in four dimensions about a fixed point have six degrees of freedom.

3. Rotation - Wikipedia

   en.wikipedia.org/wiki/Rotation

   A sphere rotating (spinning) about an axis. Rotation or rotational motion is the circular movement of an object around a central line, known as an axis of rotation.A plane figure can rotate in either a clockwise or counterclockwise sense around a perpendicular axis intersecting anywhere inside or outside the figure at a center of rotation.

4. Torus - Wikipedia

   en.wikipedia.org/wiki/Torus

   Poloidal direction (red arrow) and toroidal direction (blue arrow) A torus of revolution in 3-space can be parametrized as: [2] (,) = (+ ⁡) ⁡ (,) = (+ ⁡) ⁡ (,) = ⁡. using angular coordinates , [,), representing rotation around the tube and rotation around the torus' axis of revolution, respectively, where the major radius is the distance from the center of the tube to the center of ...

5. Ulam spiral - Wikipedia

   en.wikipedia.org/wiki/Ulam_spiral

   Klauber's 1932 paper describes a triangle in which row n contains the numbers (n − 1) 2 + 1 through n 2. As in the Ulam spiral, quadratic polynomials generate numbers that lie in straight lines. Vertical lines correspond to numbers of the form k 2 − k + M. Vertical and diagonal lines with a high density of prime numbers are evident in the ...

6. Coin rotation paradox - Wikipedia

   en.wikipedia.org/wiki/Coin_rotation_paradox

   The outer coin makes two rotations rolling once around the inner coin. The path of a single point on the edge of the moving coin is a cardioid.. The coin rotation paradox is the counter-intuitive math problem that, when one coin is rolled around the rim of another coin of equal size, the moving coin completes not one but two full rotations after going all the way around the stationary coin ...

7. On These Issues, Trump 2.0 Will Differ From Trump 1.0 - AOL

   www.aol.com/news/issues-trump-2-0-differ...

   But in some areas, Trump 2.0 is likely to look very different from Trump 1.0. After taking credit for spearheading the development of COVID-19 vaccines in 2020, Trump now plans to bring an anti ...