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  2. Turn (angle) - Wikipedia

    en.wikipedia.org/wiki/Turn_(angle)

    The superseded version ISO 80000-3:2006 defined "revolution" as a special name for the dimensionless unit "one", [c] which also received other special names, such as the radian. [ d ] Despite their dimensional homogeneity , these two specially named dimensionless units are applicable for non-comparable kinds of quantity : rotation and angle ...

  3. Revolutions in Mathematics - Wikipedia

    en.wikipedia.org/wiki/Revolutions_in_Mathematics

    Herbert Mehrtens, T. S. Kuhn's theories and mathematics: a discussion paper on the "new historiography" of mathematics (1976) (21–41); Herbert Mehrtens, Appendix (1992): revolutions reconsidered (42–48); Joseph Dauben, Conceptual revolutions and the history of mathematics: two studies in the growth of knowledge (1984) (49–71);

  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 θ, φ ∈ [0, 2π), representing rotation around the tube and rotation around the torus's axis of revolution, respectively, where the major radius R is the distance from the center of the tube to ...

  5. Threequarters - Wikipedia

    en.wikipedia.org/wiki/Threequarters

    The fraction (mathematics) 3 ⁄ 4 (three quarters) Topics referred to by the same term This disambiguation page lists articles associated with the title Threequarters .

  6. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    In a fraction, the number of equal parts being described is the numerator (from Latin: numerātor, "counter" or "numberer"), and the type or variety of the parts is the denominator (from Latin: dēnōminātor, "thing that names or designates").

  7. Pappus's centroid theorem - Wikipedia

    en.wikipedia.org/wiki/Pappus's_centroid_theorem

    The theorem applied to an open cylinder, cone and a sphere to obtain their surface areas. The centroids are at a distance a (in red) from the axis of rotation.. In mathematics, Pappus's centroid theorem (also known as the Guldinus theorem, Pappus–Guldinus theorem or Pappus's theorem) is either of two related theorems dealing with the surface areas and volumes of surfaces and solids of ...

  8. French Revolution - Wikipedia

    en.wikipedia.org/wiki/French_Revolution

    The Revolution resulted from multiple long-term and short-term factors, culminating in a social, economic, financial and political crisis in the late 1780s. [3] [4] [5] Combined with resistance to reform by the ruling elite, and indecisive policy by Louis XVI and his ministers, the result was a crisis the state was unable to manage. [6] [7]

  9. Rotation formalisms in three dimensions - Wikipedia

    en.wikipedia.org/wiki/Rotation_formalisms_in...

    Rotation formalisms are focused on proper (orientation-preserving) motions of the Euclidean space with one fixed point, that a rotation refers to.Although physical motions with a fixed point are an important case (such as ones described in the center-of-mass frame, or motions of a joint), this approach creates a knowledge about all motions.